Проверьте подключение к Интернету с Swift
Когда я пытаюсь проверить подключение к Интернету на своем iPhone, я получаю кучу ошибок. Может ли кто-нибудь помочь мне исправить это?
Код:
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = 0
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {
return false
}
let isReachable = (flags & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection) ? true : false
}
}
Ошибки с кодом:
![Errors]()
Если он не читается, ошибка 1 говорит:
'Int' не конвертируется в 'SCNetworkReachabilityFlags'
Ошибка 2 и 3:
Не удалось найти перегрузку для "init", которая принимает предоставленные аргументы
Ответы
Ответ 1
Для решения проблемы 4G, упомянутой в комментариях, я использовал реализацию достижимости @AshleyMills как справочную и переписанную Reachability for Swift 3.1:
обновлено: Xcode 10.1 • Swift 4 или новее
Файл Reachability.swift
import Foundation
import SystemConfiguration
class Reachability {
var hostname: String?
var isRunning = false
var isReachableOnWWAN: Bool
var reachability: SCNetworkReachability?
var reachabilityFlags = SCNetworkReachabilityFlags()
let reachabilitySerialQueue = DispatchQueue(label: "ReachabilityQueue")
init(hostname: String) throws {
guard let reachability = SCNetworkReachabilityCreateWithName(nil, hostname) else {
throw Network.Error.failedToCreateWith(hostname)
}
self.reachability = reachability
self.hostname = hostname
isReachableOnWWAN = true
try start()
}
init() throws {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let reachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
throw Network.Error.failedToInitializeWith(zeroAddress)
}
self.reachability = reachability
isReachableOnWWAN = true
try start()
}
var status: Network.Status {
return !isConnectedToNetwork ? .unreachable :
isReachableViaWiFi ? .wifi :
isRunningOnDevice ? .wwan : .unreachable
}
var isRunningOnDevice: Bool = {
#if targetEnvironment(simulator)
return false
#else
return true
#endif
}()
deinit { stop() }
}
extension Reachability {
func start() throws {
guard let reachability = reachability, !isRunning else { return }
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
context.info = Unmanaged<Reachability>.passUnretained(self).toOpaque()
guard SCNetworkReachabilitySetCallback(reachability, callout, &context) else { stop()
throw Network.Error.failedToSetCallout
}
guard SCNetworkReachabilitySetDispatchQueue(reachability, reachabilitySerialQueue) else { stop()
throw Network.Error.failedToSetDispatchQueue
}
reachabilitySerialQueue.async { self.flagsChanged() }
isRunning = true
}
func stop() {
defer { isRunning = false }
guard let reachability = reachability else { return }
SCNetworkReachabilitySetCallback(reachability, nil, nil)
SCNetworkReachabilitySetDispatchQueue(reachability, nil)
self.reachability = nil
}
var isConnectedToNetwork: Bool {
return isReachable &&
!isConnectionRequiredAndTransientConnection &&
!(isRunningOnDevice && isWWAN && !isReachableOnWWAN)
}
var isReachableViaWiFi: Bool {
return isReachable && isRunningOnDevice && !isWWAN
}
/// Flags that indicate the reachability of a network node name or address, including whether a connection is required, and whether some user intervention might be required when establishing a connection.
var flags: SCNetworkReachabilityFlags? {
guard let reachability = reachability else { return nil }
var flags = SCNetworkReachabilityFlags()
return withUnsafeMutablePointer(to: &flags) {
SCNetworkReachabilityGetFlags(reachability, UnsafeMutablePointer($0))
} ? flags : nil
}
/// compares the current flags with the previous flags and if changed posts a flagsChanged notification
func flagsChanged() {
guard let flags = flags, flags != reachabilityFlags else { return }
reachabilityFlags = flags
NotificationCenter.default.post(name: .flagsChanged, object: self)
}
/// The specified node name or address can be reached via a transient connection, such as PPP.
var transientConnection: Bool { return flags?.contains(.transientConnection) == true }
/// The specified node name or address can be reached using the current network configuration.
var isReachable: Bool { return flags?.contains(.reachable) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. If this flag is set, the kSCNetworkReachabilityFlagsConnectionOnTraffic flag, kSCNetworkReachabilityFlagsConnectionOnDemand flag, or kSCNetworkReachabilityFlagsIsWWAN flag is also typically set to indicate the type of connection required. If the user must manually make the connection, the kSCNetworkReachabilityFlagsInterventionRequired flag is also set.
var connectionRequired: Bool { return flags?.contains(.connectionRequired) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. Any traffic directed to the specified name or address will initiate the connection.
var connectionOnTraffic: Bool { return flags?.contains(.connectionOnTraffic) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established.
var interventionRequired: Bool { return flags?.contains(.interventionRequired) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. The connection will be established "On Demand" by the CFSocketStream programming interface (see CFStream Socket Additions for information on this). Other functions will not establish the connection.
var connectionOnDemand: Bool { return flags?.contains(.connectionOnDemand) == true }
/// The specified node name or address is one that is associated with a network interface on the current system.
var isLocalAddress: Bool { return flags?.contains(.isLocalAddress) == true }
/// Network traffic to the specified node name or address will not go through a gateway, but is routed directly to one of the interfaces in the system.
var isDirect: Bool { return flags?.contains(.isDirect) == true }
/// The specified node name or address can be reached via a cellular connection, such as EDGE or GPRS.
var isWWAN: Bool { return flags?.contains(.isWWAN) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. If this flag is set
/// The specified node name or address can be reached via a transient connection, such as PPP.
var isConnectionRequiredAndTransientConnection: Bool {
return (flags?.intersection([.connectionRequired, .transientConnection]) == [.connectionRequired, .transientConnection]) == true
}
}
func callout(reachability: SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutableRawPointer?) {
guard let info = info else { return }
DispatchQueue.main.async {
Unmanaged<Reachability>
.fromOpaque(info)
.takeUnretainedValue()
.flagsChanged()
}
}
extension Notification.Name {
static let flagsChanged = Notification.Name("FlagsChanged")
}
struct Network {
static var reachability: Reachability!
enum Status: String {
case unreachable, wifi, wwan
}
enum Error: Swift.Error {
case failedToSetCallout
case failedToSetDispatchQueue
case failedToCreateWith(String)
case failedToInitializeWith(sockaddr_in)
}
}
использование
Инициализируйте его в вашем методе AppDelegate.swift didFinishLaunchingWithOptions и обработайте все возможные ошибки:
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
do {
try Network.reachability = Reachability(hostname: "www.google.com")
}
catch {
switch error as? Network.Error {
case let .failedToCreateWith(hostname)?:
print("Network error:\nFailed to create reachability object With host named:", hostname)
case let .failedToInitializeWith(address)?:
print("Network error:\nFailed to initialize reachability object With address:", address)
case .failedToSetCallout?:
print("Network error:\nFailed to set callout")
case .failedToSetDispatchQueue?:
print("Network error:\nFailed to set DispatchQueue")
case .none:
print(error)
}
}
return true
}
}
И образец контроллера представления:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default
.addObserver(self,
selector: #selector(statusManager),
name: .flagsChanged,
object: nil)
updateUserInterface()
}
func updateUserInterface() {
switch Network.reachability.status {
case .unreachable:
view.backgroundColor = .red
case .wwan:
view.backgroundColor = .yellow
case .wifi:
view.backgroundColor = .green
}
print("Reachability Summary")
print("Status:", Network.reachability.status)
print("HostName:", Network.reachability.hostname ?? "nil")
print("Reachable:", Network.reachability.isReachable)
print("Wifi:", Network.reachability.isReachableViaWiFi)
}
@objc func statusManager(_ notification: Notification) {
updateUserInterface()
}
}
Пример проекта
Ответ 2
Для Swift 3, Swift 4 (работа с сотовой связью и Wi-Fi):
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
/* Only Working for WIFI
let isReachable = flags == .reachable
let needsConnection = flags == .connectionRequired
return isReachable && !needsConnection
*/
// Working for Cellular and WIFI
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
}
Использование:
if Reachability.isConnectedToNetwork(){
print("Internet Connection Available!")
}else{
print("Internet Connection not Available!")
}
Ответ 3
Создайте новый файл Swift в своем проекте, назовите его Reachability.swift. Вырежьте и вставьте в него следующий код, чтобы создать свой класс.
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
let isReachable = flags == .Reachable
let needsConnection = flags == .ConnectionRequired
return isReachable && !needsConnection
}
}
Вы можете проверить подключение к Интернету в любом месте своего проекта, используя этот код:
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}
Если пользователь не подключен к Интернету, вы можете показать им диалоговое окно оповещения, чтобы уведомить их.
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
var alert = UIAlertView(title: "No Internet Connection", message: "Make sure your device is connected to the internet.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}
Объяснение:
Мы делаем многоразовый публичный класс и метод, который можно использовать в любом месте проекта для проверки подключения к Интернету. Нам необходимо добавить фреймворки Foundation и System Configuration.
В общедоступном классе Reachability метод isConnectedToNetwork() -> Bool { } вернет значение bool о подключении к Интернету. Мы используем цикл if для выполнения необходимых действий в случае. Надеюсь, этого достаточно. Ура!
Ответ 4
Если кто-то уже использует Alamofire, то -
struct Connectivity {
static let sharedInstance = NetworkReachabilityManager()!
static var isConnectedToInternet:Bool {
return self.sharedInstance.isReachable
}
}
Использование:
if Connectivity.isConnectedToInternet {
print("Connected")
} else {
print("No Internet")
}
Ответ 5
Я проверил реализацию класса достижимости Ashley Mill без Cocoa Pods/Dependancy Manager. Идея состоит в том, чтобы сделать зависимость Reachability свободной в проекте.
Xcode 7.2 - Swift 2.1
1) https://github.com/ashleymills/Reachability.swift. Загрузите в проект класс Reachability.
Примечание. При добавлении, пожалуйста, отметьте галочкой "копировать элементы, если необходимо".
2) Создайте класс AppManager.swift. Этот класс будет использоваться как класс Public Model, где будут добавлены общедоступные методы и данные и могут быть использованы в любом VC.
// AppManager.swift
import UIKit
import Foundation
class AppManager: NSObject{
var delegate:AppManagerDelegate? = nil
private var _useClosures:Bool = false
private var reachability: Reachability?
private var _isReachability:Bool = false
private var _reachabiltyNetworkType :String?
var isReachability:Bool {
get {return _isReachability}
}
var reachabiltyNetworkType:String {
get {return _reachabiltyNetworkType! }
}
// Create a shared instance of AppManager
final class var sharedInstance : AppManager {
struct Static {
static var instance : AppManager?
}
if !(Static.instance != nil) {
Static.instance = AppManager()
}
return Static.instance!
}
// Reachability Methods
func initRechabilityMonitor() {
print("initialize rechability...")
do {
let reachability = try Reachability.reachabilityForInternetConnection()
self.reachability = reachability
} catch ReachabilityError.FailedToCreateWithAddress(let address) {
print("Unable to create\nReachability with address:\n\(address)")
return
} catch {}
if (_useClosures) {
reachability?.whenReachable = { reachability in
self.notifyReachability(reachability)
}
reachability?.whenUnreachable = { reachability in
self.notifyReachability(reachability)
}
} else {
self.notifyReachability(reachability!)
}
do {
try reachability?.startNotifier()
} catch {
print("unable to start notifier")
return
}
}
private func notifyReachability(reachability:Reachability) {
if reachability.isReachable() {
self._isReachability = true
//Determine Network Type
if reachability.isReachableViaWiFi() {
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.WIFI_NETWORK.rawValue
} else {
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.WWAN_NETWORK.rawValue
}
} else {
self._isReachability = false
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.OTHER.rawValue
}
NSNotificationCenter.defaultCenter().addObserver(self, selector: "reachabilityChanged:", name: ReachabilityChangedNotification, object: reachability)
}
func reachabilityChanged(note: NSNotification) {
let reachability = note.object as! Reachability
dispatch_async(dispatch_get_main_queue()) {
if (self._useClosures) {
self.reachability?.whenReachable = { reachability in
self.notifyReachability(reachability)
}
self.reachability?.whenUnreachable = { reachability in
self.notifyReachability(reachability)
}
} else {
self.notifyReachability(reachability)
}
self.delegate?.reachabilityStatusChangeHandler(reachability)
}
}
deinit {
reachability?.stopNotifier()
if (!_useClosures) {
NSNotificationCenter.defaultCenter().removeObserver(self, name: ReachabilityChangedNotification, object: nil)
}
}
}
3) Сделайте класс делегата. Я использую метод делегата для уведомления о состоянии подключения.
// Protocols.swift
import Foundation
@objc protocol AppManagerDelegate:NSObjectProtocol {
func reachabilityStatusChangeHandler(reachability:Reachability)
}
4) Сделайте родительский класс UIViewController (метод наследования). Родительский класс имеет методы, доступные всем дочерним VC.
// UIappViewController.swift
import UIKit
class UIappViewController: UIViewController,AppManagerDelegate {
var manager:AppManager = AppManager.sharedInstance
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func reachabilityStatusChangeHandler(reachability: Reachability) {
if reachability.isReachable() {
print("isReachable")
} else {
print("notReachable")
}
}
}
5) Начать мониторинг подключения к Интернету в режиме реального времени в AppDelegate.
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
AppManager.sharedInstance.initRechabilityMonitor()
return true
}
6) Я добавил приложение App Swift File AppReference для хранения значений постоянных перечислений.
// AppReference.swift
import Foundation
enum CONNECTION_NETWORK_TYPE : String {
case WIFI_NETWORK = "Wifi"
case WWAN_NETWORK = "Cellular"
case OTHER = "Other"
}
7) В ViewController (например, вы хотите вызывать API только в том случае, если сеть доступна)
// ViewController.swift
import UIKit
class ViewController: UIappViewController {
var reachability:Reachability?
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
if(AppManager.sharedInstance.isReachability)
{
print("net available")
//call API from here.
} else {
dispatch_async(dispatch_get_main_queue()) {
print("net not available")
//Show Alert
}
}
//Determine Network Type
if(AppManager.sharedInstance.reachabiltyNetworkType == "Wifi")
{
print(".Wifi")
}
else if (AppManager.sharedInstance.reachabiltyNetworkType == "Cellular")
{
print(".Cellular")
}
else {
dispatch_async(dispatch_get_main_queue()) {
print("Network not reachable")
}
}
}
override func viewWillAppear(animated: Bool) {
}
override func didReceiveMemoryWarning() {
}
}
Образец можно загрузить @https://github.com/alvinreuben/Reachability-Sample
Модернизировано до Swift 3.1-
https://github.com/alvinvgeorge/Reachability-UpgradedToSwift3
Ответ 6
Просто понял это для себя.
Xcode: 7.3.1, iOS 9.3.3
Используя ashleymills/Reachability.swift как Reachability.swift в моем проекте, я создал следующую функцию:
func hasConnectivity() -> Bool {
do {
let reachability: Reachability = try Reachability.reachabilityForInternetConnection()
let networkStatus: Int = reachability.currentReachabilityStatus.hashValue
return (networkStatus != 0)
}
catch {
// Handle error however you please
return false
}
}
Просто позвоните hasConnectivity(), где вам нужно проверить соединение. Это работает как для Wi-Fi, так и для Cellular.
Добавление ashleymills Reachability.swift, чтобы люди не могли перемещаться между сайтами:
Copyright (c) 2014, Ashley Mills
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
// Reachability.swift version 2.2beta2
import SystemConfiguration
import Foundation
public enum ReachabilityError: ErrorType {
case FailedToCreateWithAddress(sockaddr_in)
case FailedToCreateWithHostname(String)
case UnableToSetCallback
case UnableToSetDispatchQueue
}
public let ReachabilityChangedNotification = "ReachabilityChangedNotification"
func callback(reachability:SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutablePointer<Void>) {
let reachability = Unmanaged<Reachability>.fromOpaque(COpaquePointer(info)).takeUnretainedValue()
dispatch_async(dispatch_get_main_queue()) {
reachability.reachabilityChanged(flags)
}
}
public class Reachability: NSObject {
public typealias NetworkReachable = (Reachability) -> ()
public typealias NetworkUnreachable = (Reachability) -> ()
public enum NetworkStatus: CustomStringConvertible {
case NotReachable, ReachableViaWiFi, ReachableViaWWAN
public var description: String {
switch self {
case .ReachableViaWWAN:
return "Cellular"
case .ReachableViaWiFi:
return "WiFi"
case .NotReachable:
return "No Connection"
}
}
}
// MARK: - *** Public properties ***
public var whenReachable: NetworkReachable?
public var whenUnreachable: NetworkUnreachable?
public var reachableOnWWAN: Bool
public var notificationCenter = NSNotificationCenter.defaultCenter()
public var currentReachabilityStatus: NetworkStatus {
if isReachable() {
if isReachableViaWiFi() {
return .ReachableViaWiFi
}
if isRunningOnDevice {
return .ReachableViaWWAN
}
}
return .NotReachable
}
public var currentReachabilityString: String {
return "\(currentReachabilityStatus)"
}
private var previousFlags: SCNetworkReachabilityFlags?
// MARK: - *** Initialisation methods ***
required public init(reachabilityRef: SCNetworkReachability) {
reachableOnWWAN = true
self.reachabilityRef = reachabilityRef
}
public convenience init(hostname: String) throws {
let nodename = (hostname as NSString).UTF8String
guard let ref = SCNetworkReachabilityCreateWithName(nil, nodename) else { throw ReachabilityError.FailedToCreateWithHostname(hostname) }
self.init(reachabilityRef: ref)
}
public class func reachabilityForInternetConnection() throws -> Reachability {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let ref = withUnsafePointer(&zeroAddress, {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}) else { throw ReachabilityError.FailedToCreateWithAddress(zeroAddress) }
return Reachability(reachabilityRef: ref)
}
public class func reachabilityForLocalWiFi() throws -> Reachability {
var localWifiAddress: sockaddr_in = sockaddr_in(sin_len: __uint8_t(0), sin_family: sa_family_t(0), sin_port: in_port_t(0), sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
localWifiAddress.sin_len = UInt8(sizeofValue(localWifiAddress))
localWifiAddress.sin_family = sa_family_t(AF_INET)
// IN_LINKLOCALNETNUM is defined in <netinet/in.h> as 169.254.0.0
let address: UInt32 = 0xA9FE0000
localWifiAddress.sin_addr.s_addr = in_addr_t(address.bigEndian)
guard let ref = withUnsafePointer(&localWifiAddress, {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}) else { throw ReachabilityError.FailedToCreateWithAddress(localWifiAddress) }
return Reachability(reachabilityRef: ref)
}
// MARK: - *** Notifier methods ***
public func startNotifier() throws {
guard !notifierRunning else { return }
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
context.info = UnsafeMutablePointer(Unmanaged.passUnretained(self).toOpaque())
if !SCNetworkReachabilitySetCallback(reachabilityRef!, callback, &context) {
stopNotifier()
throw ReachabilityError.UnableToSetCallback
}
if !SCNetworkReachabilitySetDispatchQueue(reachabilityRef!, reachabilitySerialQueue) {
stopNotifier()
throw ReachabilityError.UnableToSetDispatchQueue
}
// Perform an intial check
dispatch_async(reachabilitySerialQueue) { () -> Void in
let flags = self.reachabilityFlags
self.reachabilityChanged(flags)
}
notifierRunning = true
}
public func stopNotifier() {
defer { notifierRunning = false }
guard let reachabilityRef = reachabilityRef else { return }
SCNetworkReachabilitySetCallback(reachabilityRef, nil, nil)
SCNetworkReachabilitySetDispatchQueue(reachabilityRef, nil)
}
// MARK: - *** Connection test methods ***
public func isReachable() -> Bool {
let flags = reachabilityFlags
return isReachableWithFlags(flags)
}
public func isReachableViaWWAN() -> Bool {
let flags = reachabilityFlags
// Check we're not on the simulator, we're REACHABLE and check we're on WWAN
return isRunningOnDevice && isReachable(flags) && isOnWWAN(flags)
}
public func isReachableViaWiFi() -> Bool {
let flags = reachabilityFlags
// Check we're reachable
if !isReachable(flags) {
return false
}
// Must be on WiFi if reachable but not on an iOS device (i.e. simulator)
if !isRunningOnDevice {
return true
}
// Check we're NOT on WWAN
return !isOnWWAN(flags)
}
// MARK: - *** Private methods ***
private var isRunningOnDevice: Bool = {
#if (arch(i386) || arch(x86_64)) && os(iOS)
return false
#else
return true
#endif
}()
private var notifierRunning = false
private var reachabilityRef: SCNetworkReachability?
private let reachabilitySerialQueue = dispatch_queue_create("uk.co.ashleymills.reachability", DISPATCH_QUEUE_SERIAL)
private func reachabilityChanged(flags: SCNetworkReachabilityFlags) {
guard previousFlags != flags else { return }
if isReachableWithFlags(flags) {
if let block = whenReachable {
block(self)
}
} else {
if let block = whenUnreachable {
block(self)
}
}
notificationCenter.postNotificationName(ReachabilityChangedNotification, object:self)
previousFlags = flags
}
private func isReachableWithFlags(flags: SCNetworkReachabilityFlags) -> Bool {
if !isReachable(flags) {
return false
}
if isConnectionRequiredOrTransient(flags) {
return false
}
if isRunningOnDevice {
if isOnWWAN(flags) && !reachableOnWWAN {
// We don't want to connect when on 3G.
return false
}
}
return true
}
// WWAN may be available, but not active until a connection has been established.
// WiFi may require a connection for VPN on Demand.
private func isConnectionRequired() -> Bool {
return connectionRequired()
}
private func connectionRequired() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags)
}
// Dynamic, on demand connection?
private func isConnectionOnDemand() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags) && isConnectionOnTrafficOrDemand(flags)
}
// Is user intervention required?
private func isInterventionRequired() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags) && isInterventionRequired(flags)
}
private func isOnWWAN(flags: SCNetworkReachabilityFlags) -> Bool {
#if os(iOS)
return flags.contains(.IsWWAN)
#else
return false
#endif
}
private func isReachable(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.Reachable)
}
private func isConnectionRequired(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionRequired)
}
private func isInterventionRequired(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.InterventionRequired)
}
private func isConnectionOnTraffic(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionOnTraffic)
}
private func isConnectionOnDemand(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionOnDemand)
}
func isConnectionOnTrafficOrDemand(flags: SCNetworkReachabilityFlags) -> Bool {
return !flags.intersect([.ConnectionOnTraffic, .ConnectionOnDemand]).isEmpty
}
private func isTransientConnection(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.TransientConnection)
}
private func isLocalAddress(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.IsLocalAddress)
}
private func isDirect(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.IsDirect)
}
private func isConnectionRequiredOrTransient(flags: SCNetworkReachabilityFlags) -> Bool {
let testcase:SCNetworkReachabilityFlags = [.ConnectionRequired, .TransientConnection]
return flags.intersect(testcase) == testcase
}
private var reachabilityFlags: SCNetworkReachabilityFlags {
guard let reachabilityRef = reachabilityRef else { return SCNetworkReachabilityFlags() }
var flags = SCNetworkReachabilityFlags()
let gotFlags = withUnsafeMutablePointer(&flags) {
SCNetworkReachabilityGetFlags(reachabilityRef, UnsafeMutablePointer($0))
}
if gotFlags {
return flags
} else {
return SCNetworkReachabilityFlags()
}
}
override public var description: String {
var W: String
if isRunningOnDevice {
W = isOnWWAN(reachabilityFlags) ? "W" : "-"
} else {
W = "X"
}
let R = isReachable(reachabilityFlags) ? "R" : "-"
let c = isConnectionRequired(reachabilityFlags) ? "c" : "-"
let t = isTransientConnection(reachabilityFlags) ? "t" : "-"
let i = isInterventionRequired(reachabilityFlags) ? "i" : "-"
let C = isConnectionOnTraffic(reachabilityFlags) ? "C" : "-"
let D = isConnectionOnDemand(reachabilityFlags) ? "D" : "-"
let l = isLocalAddress(reachabilityFlags) ? "l" : "-"
let d = isDirect(reachabilityFlags) ? "d" : "-"
return "\(W)\(R) \(c)\(t)\(i)\(C)\(D)\(l)\(d)"
}
deinit {
stopNotifier()
reachabilityRef = nil
whenReachable = nil
whenUnreachable = nil
}
}
Ответ 7
Apple представила Network Framework в iOS12.
import Foundation
import Network
class NetworkReachability {
var pathMonitor: NWPathMonitor!
var path: NWPath?
lazy var pathUpdateHandler: ((NWPath) -> Void) = { path in
self.path = path
if path.status == NWPath.Status.satisfied {
print("Connected")
} else if path.status == NWPath.Status.unsatisfied {
print("unsatisfied")
} else if path.status == NWPath.Status.requiresConnection {
print("requiresConnection")
}
}
let backgroudQueue = DispatchQueue.global(qos: .background)
init() {
pathMonitor = NWPathMonitor()
pathMonitor.pathUpdateHandler = self.pathUpdateHandler
pathMonitor.start(queue: backgroudQueue)
}
func isNetworkAvailable() -> Bool {
if let path = self.path {
if path.status == NWPath.Status.satisfied {
return true
}
}
return false
}
}
Ответ 8
Хотя это не дает прямого ответа на ваш вопрос, я хотел бы упомянуть, что Apple недавно провела эту беседу:
https://developer.apple.com/videos/play/wwdc2018/714/
Около 09:55 он говорит о том, что вы делаете:
- Проверьте подключение
- Если соединение → Сделай что-нибудь
- Если нет соединения → сделать что-то еще (подождать? Повторить?)
Однако здесь есть несколько подводных камней:
- Что если на шаге 2 написано, что у него есть соединение, а через 0,5 секунды - нет?
- Что делать, если пользователь находится за прокси
- И последнее, но не менее важное, что, если некоторые ответы здесь не могут определить правильность подключения? (Я уверен, что если вы быстро переключите свое соединение, зайдете в wi-fi и выключите его (просто усложните), оно почти никогда не сможет правильно определить, было у меня соединение или нет).
- Цитата из видео: "Невозможно гарантировать, удастся ли будущая операция или нет"
Следующие пункты - некоторые лучшие практики согласно Apple:
Согласно сообщению, не должно быть никаких причин предварительно проверять, подключено ли у вас интернет-соединение или нет, поскольку оно может быть неточным во время отправки запроса на сервер.
Ответ 9
Я сделал свое собственное решение, используя NSTimer и Alamofire:
import Alamofire
public class ConnectionHelper: NSObject {
var request: Alamofire.Request?
func isInternetConnected(completionHandler: Bool -> Void) {
NSTimer.scheduledTimerWithTimeInterval(5.0, target: self, selector: "requestTimeout", userInfo: nil, repeats: false)
request = Alamofire
.request(
Method.HEAD,
"http://www.testurl.com"
)
.response { response in
if response.3?.code == -999 {
completionHandler(
false
)
} else {
completionHandler(
true
)
}
}
}
func requestTimeout() {
request!.cancel()
}
}
NSTimer используется как тайм-аут и используется из-за ненадежных результатов, используя тайм-аут Alamofire. Запрос должен быть сделан на URL-адрес, которому вы доверяете, чтобы быть надежным, например ваш собственный сервер или сервер, на котором расположены службы, на которых вы зависите.
Когда таймер истекает, запрос отменяется и результаты возвращаются с помощью обработчика завершения.
Использование:
ConnectionHelper().isInternetConnected() { internetConnected in
if internetConnected {
// Connected
} else {
// Not connected
}
}
Ответ 10
Если вы используете Alamofire, вы можете сделать что-то вроде этого:
let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
configuration.timeoutIntervalForRequest = 15 //Set timeouts in sec
configuration.timeoutIntervalForResource = 15
let alamoFireManager = Alamofire.Manager(configuration:configuration)
alamoFireManager?.request(.GET, "https://yourURL.com", parameters: headers, encoding: .URL)
.validate()
.responseJSON { response in
if let error = response.result.error {
switch error.code{
case -1001:
print("Slow connection")
return
case -1009:
print("No Connection!")
return
default: break
}
}
Ответ 11
здесь мое решение для swift 2.3 с lib (Reachability.swift)
Войдите в свой Podfile и добавьте:
pod 'ReachabilitySwift', '~> 2.4' // swift 2.3
Затем в ваш terminal:
pod install
Затем создайте новый файл ReachabilityManager и добавьте следующий код:
import Foundation
import ReachabilitySwift
enum ReachabilityManagerType {
case Wifi
case Cellular
case None
}
class ReachabilityManager {
static let sharedInstance = ReachabilityManager()
private var reachability: Reachability!
private var reachabilityManagerType: ReachabilityManagerType = .None
private init() {
do {
self.reachability = try Reachability.reachabilityForInternetConnection()
} catch {
print("Unable to create Reachability")
return
}
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ReachabilityManager.reachabilityChanged(_:)),name: ReachabilityChangedNotification,object: self.reachability)
do{
try self.reachability.startNotifier()
}catch{
print("could not start reachability notifier")
}
}
@objc private func reachabilityChanged(note: NSNotification) {
let reachability = note.object as! Reachability
if reachability.isReachable() {
if reachability.isReachableViaWiFi() {
self.reachabilityManagerType = .Wifi
} else {
self.reachabilityManagerType = .Cellular
}
} else {
self.reachabilityManagerType = .None
}
}
}
extension ReachabilityManager {
func isConnectedToNetwork() -> Bool {
return reachabilityManagerType != .None
}
}
Как это использовать:
перейдите в AppDelegate.swift и добавьте следующий код:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
ReachabilityManager.sharedInstance
}
Затем, когда вы хотите проверить, подключено ли устройство к Интернету, выполните следующие действия.
if ReachabilityManager.sharedInstance.isConnectedToNetwork() {
// Connected
} else {
// Not connected
}
Ответ 12
С помощью приведенного ниже кода вы можете проверить подключение к Интернету как для сотовой сети, так и для Wi-Fi.
язык - Swift 3.0
import UIKit
import Foundation
import SystemConfiguration
class NetworkConnection: UIViewController {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == false {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection)
}
class func checkConnection(sender:UIViewController){
if NetworkConnection.isConnectedToNetwork() == true {
print("Connected to the internet")
// Do something
} else {
print("No internet connection")
let alertController = UIAlertController(title: "No Internet Available", message: "", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.default){(result:UIAlertAction) -> Void in
return
}
alertController.addAction(okAction)
sender.present(alertController, animated: true, completion: nil)
// Do something
}
}
}
Ответ 13
Для быстрого 3 я не мог использовать только достижимость от решений RAJAMOHAN-S, так как он возвращает "true", если есть WiFi, но нет Интернета. Таким образом, я выполнил вторую проверку с помощью класса URLSession и обработчика завершения.
Вот весь класс.
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
// Working for Cellular and WIFI
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (Bool) -> Void) {
// 1. Check the WiFi Connection
guard isConnectedToNetwork() else {
completionHandler(false)
return
}
// 2. Check the Internet Connection
var webAddress = "https://www.google.com" // Default Web Site
if let _ = webSiteToPing {
webAddress = webSiteToPing!
}
guard let url = URL(string: webAddress) else {
completionHandler(false)
print("could not create url from: \(webAddress)")
return
}
let urlRequest = URLRequest(url: url)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
if error != nil || response == nil {
completionHandler(false)
} else {
completionHandler(true)
}
})
task.resume()
}
}
И вы называете это следующим образом:
Reachability.isInternetAvailable(webSiteToPing: nil) { (isInternetAvailable) in
guard isInternetAvailable else {
// Inform user for example
return
}
// Do some action if there is Internet
}
Ответ 14
Это моя версия. По сути, это не приносит ничего нового. Я связал это с UIDevice.
import UIKit
import SystemConfiguration
extension UIDevice {
open class var isConnectedToNetwork: Bool {
get {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard
let defaultRouteReachability: SCNetworkReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}),
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags() as SCNetworkReachabilityFlags?,
SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags)
else { return false }
return flags.contains(.reachable) && !flags.contains(.connectionRequired)
}
}
}
print("Network status availability: " + ( UIDevice.isConnectedToNetwork ? "true" : "false" ))
Ответ 15
Хотя он может не определять напрямую, подключен ли телефон к сети, самым простым (самым чистым?) Решением было бы "пинговать" Google или какой-либо другой сервер (что невозможно, если телефон не подключен к сети). ):
private var urlSession:URLSession = {
var newConfiguration:URLSessionConfiguration = .default
newConfiguration.waitsForConnectivity = false
newConfiguration.allowsCellularAccess = true
return URLSession(configuration: newConfiguration)
}()
public func canReachGoogle() -> Bool
{
let url = URL(string: "https://8.8.8.8")
let semaphore = DispatchSemaphore(value: 0)
var success = false
let task = urlSession.dataTask(with: url!)
{ data, response, error in
if error != nil
{
success = false
}
else
{
success = true
}
semaphore.signal()
}
task.resume()
semaphore.wait()
return success
}
Если вы обеспокоены тем, что сервер может быть недоступен или может заблокировать ваш IP-адрес, вы всегда можете пропинговать несколько серверов одинаковым образом и возвращать информацию о доступности любого из них. Или кто-то настроил выделенный сервер только для этой цели.
Ответ 16
struct Connectivity {
static let sharedInstance = NetworkReachabilityManager()!
static var isConnectedToInternet:Bool {
return self.sharedInstance.isReachable
}
}
Теперь назовите это
if Connectivity.isConnectedToInternet{
call_your_methods_here()
}else{
show_alert_for_noInternet()
}
