所以,我正在试图弄清楚如何监控iOS设备中的电池电量和状态变化。
到目前为止,我已经确定了如何获得当前的电池电量,但无法弄清楚如何获取状态或如何监控任何更改,因此我可以弹出对话框(或通知,但我认为我可以'无论如何都要在后台监听这个......)100%充电时。
这是我到目前为止所做的:
@IBOutlet var BatteryLevelLabel: UILabel!
@IBOutlet var BatteryStateLabel: UILabel!
// function to return the devices battery level
func batteryLevel()-> Float {
return UIDevice.currentDevice().batteryLevel
}
// function to return the devices battery state (Unknown, Unplugged, Charging, or Full)
func batteryState()-> UIDeviceBatteryState {
return UIDevice.currentDevice().batteryState
}
override func viewDidLoad() {
super.viewDidLoad()
let currentBatteryLevel = batteryLevel()
// enables the tracking of the devices battery level
UIDevice.currentDevice().batteryMonitoringEnabled = true
// shows the battery level on labels
BatteryLevelLabel.text = "\(batteryLevel() * 100)%)"
BatteryStateLabel.text = "\(batteryState())"
print("Device Battery Level is: \(batteryLevel()) and the state is \(batteryState())")
// shows alert when battery is 100% (1.0)
if currentBatteryLevel == 1.0{
let chargedAlert = UIAlertController(title: "Battery Charged", message: "Your battery is 100% charged.", preferredStyle: UIAlertControllerStyle.Alert)
chargedAlert.addAction(UIAlertAction(title: "Ok", style: .Default, handler: { (action: UIAlertAction!) in
print("Handle Ok logic here")
}))
presentViewController(chargedAlert, animated: true, completion: nil)
}
}
非常感谢任何帮助!谢谢!
答案 0 :(得分:13)
您可以使用电池状态通知UIDeviceBatteryStateDidChangeNotification
和UIDeviceBatteryLevelDidChangeNotification
在状态发生变化时收到通知:
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%, ...)
}
答案 1 :(得分:5)
这是实现为Swift 3.0建议的代码@tbaranes的新方法
NotificationCenter.default.addObserver(self, selector: Selector(("batteryStateDidChange:")), name: NSNotification.Name.UIDeviceBatteryStateDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: Selector(("batteryLevelDidChange:")), name: NSNotification.Name.UIDeviceBatteryLevelDidChange, object: nil)
答案 2 :(得分:0)
UIDevice class现在有了新的方法:
获取设备电池状态
var batteryLevel: Float
设备的电池电量。
var isBatteryMonitoringEnabled: Bool
一个布尔值,指示是否启用电池监控 (true)与否(false)。
var batteryState: UIDeviceBatteryState
设备的电池状态。
UIDeviceBatteryState
具有以下值:
case unknown
无法确定设备的电池状态。
case unplugged
设备未插入电源;电池正在放电。
case charging
设备已接通电源且电池电量低于100% 充电。
case full
设备已接通电源,电池100%充电。