检测到电池警告显示为iPhone

本文介绍了检测到电池警告显示为iPhone的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

是否可以检测是否显示了电池电量警告?我向UIApplicationDidBecomeActiveNotification注册了一个通知，我想知道它是否是由于电池电量不足警告而触发的，所以我可以进行不同的处理.

Is there a way to detect whether a battery level warning was shown? I registered a notification to UIApplicationDidBecomeActiveNotification and I want to know whether it was triggered due to a low battery warning so I can handle it differently.

推荐答案

您可以通过编程方式监控电池电量，当电池电量达到一定水平时，便可以处理事件了.

You can monitor the battery level programmatically, and when it reaches a certain level, you can handle your event then.

-(NSString*)batteryStateStatus:(UIDeviceBatteryState)state{ switch ( state ) { case UIDeviceBatteryStateUnknown: return @"Unknown"; break; case UIDeviceBatteryStateUnplugged: return @"Unplugged"; break; case UIDeviceBatteryStateCharging: return @"Charging"; case UIDeviceBatteryStateFull: return @"Charged"; } return nil; } -(NSString *)getBatteryPercent { CFTypeRef blob = IOPSCopyPowerSourcesInfo(); CFArrayRef sources = IOPSCopyPowerSourcesList(blob); CFDictionaryRef pSource = NULL; const void *psValue; NSString *thePercent; int i; int curCapacity = 0; int maxCapacity = 0; int percent; int numOfSources = CFArrayGetCount(sources); //if (numOfSources == 0) return 1; for (i = 0 ; i < numOfSources ; i++) { pSource = IOPSGetPowerSourceDescription(blob, CFArrayGetValueAtIndex(sources, i)); //if (!pSource) return 2; psValue = (CFStringRef)CFDictionaryGetValue(pSource, CFSTR(kIOPSNameKey)); psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSCurrentCapacityKey)); CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity); psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSMaxCapacityKey)); CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity); percent = (int)((double)curCapacity/(double)maxCapacity * 100); } return [NSString stringWithFormat:@"%d",percent]; }