[英]How to get the exact battery level?
This is simple code of my simple batteryLevel Test app. 这是我简单的BatteryLevel Test应用程序的简单代码。
- (void)viewDidLoad
{
[super viewDidLoad];
UIDevice *device = [UIDevice currentDevice];
device.batteryMonitoringEnabled = YES;
mLabel.text = [NSString stringWithFormat:@"%0.5f",device.batteryLevel];
}
This is the image of my app, hope you can see the status bar battery level and my application battery level. 这是我的应用程序的图像,希望您可以看到状态栏电池电量和我的应用程序电池电量。 I don't know why these levels are different....?
我不知道为什么这些水平不同...? one is 99% and apps level is 0.95 which is actually 95%
一个是99%,应用程序级别是0.95,实际上是95%
// Enable this property
UIDevice.current.isBatteryMonitoringEnabled = true
// Then add observer
NotificationCenter.default.addObserver(self, selector: #selector(batteryLevelDidChange(notification:)), name: NSNotification.Name.UIDeviceBatteryLevelDidChange, object: nil)
Observer method 观察者法
@objc func batteryLevelDidChange(notification: NSNotification) {
// The battery's level did change
print(UIDevice.current.batteryLevel)
}
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