检查电池电量iOS Swift [英] Check Battery Level iOS Swift

问题描述

我刚开始使用Swift，我一直在寻找一种检查电池电量的方法。我发现这个资源，并一直在玩它但由于某种原因似乎无法让它工作。

I just started Swift and I have been looking for a way to check the battery level. I found this resource and have been playing around with it but for some reason can't seem to get it to work.

我不是很确定如何解决这个问题。有什么想法？

I wasn't quite sure how to go about fixing this. Any ideas?

推荐答案

首先启用电池监控：

UIDevice.current.isBatteryMonitoringEnabled = true

然后你可以创建一个计算机返回电池级别的属性：

Then you can create a computed property to return the battery level:

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

要监控设备电池电量，您可以为UIDeviceBatteryLevelDidChange通知添加观察者：

To monitor your device battery level you can add an observer for the UIDeviceBatteryLevelDidChange notification:

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

---

---

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

您还可以验证电池状态：

You can also verify the battery state:

var batteryState: UIDeviceBatteryState {
    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."

---

并为UIDeviceBatteryStateDidChange通知添加一个观察者：

---

and add an observer for UIDeviceBatteryStateDidChange notification:

NotificationCenter.default.addObserver(self, selector: #selector(batteryStateDidChange), name: .UIDeviceBatteryStateDidChange, object: nil)

---

---

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

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