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

问题描述

我已尝试正确获取电池电量.但是那个值不像iphone状态栏中的值.

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

通过代码使用 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 imdimatery 中一样.

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

推荐答案

Apple 文档是这样说的:

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控.

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

所以你的代码应该是这样的:

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;

希望这会有所帮助！

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