Question

我正在尝试获取项目中电池的状态，并在设备正在充电时将变量设置为true。我现在面临的问题是，无论是否收费，变量都不会更改。这是我的代码。

 var chargingStatus: Bool? = false

 func declaration() {
        UIDevice.current.isBatteryMonitoringEnabled = true
        NotificationCenter.default.addObserver(self, selector: #selector(batteryStateDidChange), name: UIDevice.batteryStateDidChangeNotification, object: nil)

    }

@objc func batteryStateDidChange(_ notification: Notification) {

        print("BATTERY STATE \(batteryState)")
        switch batteryState {
        case .unplugged, .unknown:
            chargingStatus = false
        case .charging:
            chargingStatus = true
        case .full:
            chargingStatus = false
            print("charging or full")
        }
    }

Answer 1

您必须使用电池状态通知UIDeviceBatteryStateDidChangeNotification和UIDeviceBatteryLevelDidChangeNotification

override func viewDidLoad() {
    super.viewDidLoad()
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "batteryStateDidChange:", name: UIDeviceBatteryStateDidChangeNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "batteryLevelDidChange:", name: UIDeviceBatteryLevelDidChangeNotification, object: nil)   

    // Stuff...
}

func batteryStateDidChange(notification: NSNotification){     
    // The stage did change: plugged, unplugged, full charge...
}

func batteryLevelDidChange(notification: NSNotification){     
   // The battery's level did change (98%, 99%, ...)
}

设备充电状态Swift

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