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];
}
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