Проверить уровень заряда аккумулятора iOS Swift

Ответ 1

Сначала просто включите мониторинг батареи:

UIDevice.current.isBatteryMonitoringEnabled = true

Затем вы можете создать вычисляемое свойство для возврата уровня заряда батареи:

var batteryLevel: Float {
    return UIDevice.current.batteryLevel
}

Для контроля уровня заряда батареи вашего устройства вы можете добавить наблюдателя для UIDevice.batteryLevelDidChangeNotification:

// Swift 4.1 or earlier
NotificationCenter.default.addObserver(self, selector: #selector(batteryLevelDidChange), name: .UIDeviceBatteryLevelDidChange, object: nil)
// Swift 4.2 or later
// NotificationCenter.default.addObserver(self, selector: #selector(batteryLevelDidChange), name: UIDevice.batteryLevelDidChangeNotification, object: nil)

@objc func batteryLevelDidChange(_ notification: Notification) {
    print(batteryLevel)
}

Вы также можете проверить состояние батареи:

// Swift 4.1 or earlier
var batteryState: UIDeviceBatteryState {
    return UIDevice.current.batteryState
}
// Swift 4.2 or later
var batteryState: UIDevice.BatteryState {
    return UIDevice.current.batteryState
}

case .unknown   //  "The battery state for the device cannot be determined."
case .unplugged //  "The device is not plugged into power; the battery is discharging"
case .charging  //  "The device is plugged into power and the battery is less than 100% charged."
case .full      //   "The device is plugged into power and the battery is 100% charged."

и добавьте наблюдателя для UIDevice.batteryStateDidChangeNotification:

// Swift 4.1 or earlier
NotificationCenter.default.addObserver(self, selector: #selector(batteryStateDidChange), name: .UIDeviceBatteryStateDidChange, object: nil)
// Swift 4.2 or later
NotificationCenter.default.addObserver(self, selector: #selector(batteryStateDidChange), name: UIDevice.batteryStateDidChangeNotification, object: nil)

@objc func batteryStateDidChange(_ notification: Notification) {
    switch batteryState {
    case .unplugged, .unknown:
        print("not charging")
    case .charging, .full:
        print("charging or full")
    }
}

Ответ 2

var batteryLevel: Float {get}

Убедитесь, что контроль батареи включен первым =)

Документация Apple