iOS：如何正确获得电池电量 [英] iOS: how to get correctly battery level

问题描述

我试图获得正确的电池电量。但是该值与iphone的状态栏中的值不同。

I have tried to get correctly battery level. But that value is not like value in status bar of iphone.

代码使用UIDevice：

by code use UIDevice:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

[[UIDevice currentDevice] batteryLevel];

请有人帮助我！我需要获得正确的电池电量，就像在状态栏中消失一样。

please someone help me! I need get correctly battery level that like in status bar imdimatery.

推荐答案

那么Apple的医生说这个：

Well the Apple docs say this:

电池电量范围从0.0（完全放电）到1.0（100％充电）。在访问此属性之前，请确保已启用电池监视。

Battery level ranges from 0.0 (fully discharged) to 1.0 (100% charged). Before accessing this property, ensure that battery monitoring is enabled.

所以您的代码应如下所示：

So your code should be like this:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];
float batteryLevel = [[UIDevice currentDevice] batteryLevel];

//This will give you the battery between 0.0 (empty) and 1.0 (100% charged)
//If you want it as a percentage, you can do this:

batteryLevel *= 100;

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