iOS中我的应用程序的电池消耗检查 [英] battery consumption check for my app in iOS

问题描述

我需要获取我的应用的电池消耗详细信息.
我已经使用了用于跟踪的工具，并且我的能源使用量级别为1/20.
1/20是什么?

I need to get battery consumption details for my app.
I have used instruments for tracking and i am getting energy usage level as 1/20.
What is this 1/20?

推荐答案

1. 不久:

1. Shortly :

UIDevice *Device = [UIDevice currentDevice];
[Device setBatteryMonitoringEnabled:YES];

 int state = [Device batteryState];
NSLog(@"Now the status: %d",state);
 double batLeft = (float)[Device batteryLevel] * 100;
  NSLog(@"Charge left: %ld", batLeft);

API允许您注册以接收有关电池电量变化的通知.它仅报告以5％的递增或递减变化，但您可以使用计时器并测量两次更改(或初始电池电量和第一次更改)之间的时间.注册通知的方法如下:

The API allows you to register to receive notifications for changes to the battery level. It only reports a change at 5% increments up or down, but you can use a timer and measure the time between two changes (or initial battery level and first change). Here's how you register for the notifications:

   // Use this call to get the current battery level as a float
  // [[UIDevice currentDevice] batteryLevel]

   [[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

  [[NSNotificationCenter defaultCenter] addObserver:self
                                    selector:@selector(batteryStateDidChange:)
                                     name:UIDeviceBatteryStateDidChangeNotification
                                   object:nil];

   [[NSNotificationCenter defaultCenter] addObserver:self
                                 selector:@selector(batteryLevelDidChange:)
                                     name:UIDeviceBatteryLevelDidChangeNotification
                                   object:nil];

第一个通知会告诉您当前状态，例如拔下，充电或充满电.每当达到5％的增量时，就会触发秒.

The first notification tells you the current state, e.g. unplugged, charging, or full. The second will get triggered whenever a 5% increment is reached.

在我看来，如果给您的只是更改通知(上下更改5％)，那么准确度就不是您可以很好或快速地计算出来的.如果设备不执行任何操作，则5％的更改可能会花费很长时间.

Seems to me that if all you're given is change notifications at 5% changes up or down, accuracy is not something you can calculate very well or quickly. A 5% change could take a very long time if the device isn't doing anything.

也许您可以使用计时器监视[[UIDevice currentDevice] batteryLevel]，但是，尽管我没有尝试过，但我认为它只会以相同的5％增量进行更新.

Maybe you can monitor [[UIDevice currentDevice] batteryLevel] with a timer, however, while I haven't tried it I think it only gets updated at this same 5% increment.

来自: iphone:计算电池寿命

1. 这是一个很好的例子: http: //blog.coriolis.ch/2009/02/14/以编程方式读取电池级别/

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