检查电池电量iOS Swift

我刚启动Swift,一直在寻找一种检查电池电量的方法。我找到了该资源并一直在使用它,但是由于某种原因似乎无法使它正常工作。

我不太确定如何解决此问题。有任何想法吗?

回答:

首先只需启用电池监控:

UIDevice.current.isBatteryMonitoringEnabled = true

然后,您可以创建一个计算属性以返回电池电量:

电池电量从0.0(完全放电)到1.0(100%充电)。访问此属性之前,请确保已启用电池监视。如果未启用电池监视,则电池状态为UIDevice.BatteryState.unknown,此属性的值为–1.0。

var batteryLevel: Float { UIDevice.current.batteryLevel }

要监视设备的电池电量,您可以添加观察者 UIDevice.batteryLevelDidChangeNotification

NotificationCenter.default.addObserver(self, selector: #selector(batteryLevelDidChange), name: UIDevice.batteryLevelDidChangeNotification, object: nil)


@objc func batteryLevelDidChange(_ notification: Notification) {

print(batteryLevel)

}

您还可以验证电池状态:

var batteryState: UIDevice.BatteryState { 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."


并添加观察者UIDevice.batteryStateDidChangeNotification

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")

}

}

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