iOS - 显示电池状态的问题 [英] iOS - Issue with displaying battery status

问题描述

我试图用UILabel显示电池百分比，但结果是胡说八道！这是我的代码：

I am trying to display battery percentage with UILabel , but the result is nonsense ! here is my code :

UIDevice *myDevice = [UIDevice currentDevice];
    [myDevice setBatteryMonitoringEnabled:YES];
    int i=[myDevice batteryState];
    _battery.text = [NSString stringWithFormat:@"%i",i];

标签显示数字2 !!!!

the labels shows number 2 !!!!

推荐答案

使用以下代码获取电池电量

Use below code to get battery level

UIDevice *myDevice = [UIDevice currentDevice];
[myDevice setBatteryMonitoringEnabled:YES];
float batteryLevel = [myDevice batteryLevel];
_battery.text = [NSString stringWithFormat:@"%f",batteryLevel*100];

[myDevice batteryLevel]; 会给你电池介于0.0（空）和1.0（100％充电）之间

[myDevice batteryLevel]; will give you the battery between 0.0 (empty) and 1.0 (100% charged)

希望它有所帮助..

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