如何实时监听电池状态是否发生改变

[dayyyyy0827]

现在的方法是5s钟check一次电池状态，轮询
有什么办法可以在状态发生改变的时候主动通知吗

[yuhao309]

通过UIDevice获取电池用量和状态转换。
UIDevice *device = [UIDevice currentDevice];
device.batteryMonitoringEnabled = YES;

//开启了监视电池状态的功能
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(batteryLevelChanged:) name:@"UIDeviceBatteryLevelDidChangeNotification" object:device];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(batteryStateChanged:) name:@"UIDeviceBatteryStateDidChangeNotification" object:device];


- (void)batteryLevelChanged:(id)sender
{

UIDevice *myDevice = [UIDevice currentDevice];

[myDevice setBatteryMonitoringEnabled:YES];

float batteryLevel = [myDevice batteryLevel];

NSLog(@"电池剩余比例：%@", [NSString stringWithFormat:@"%f",batteryLevel*100]);

}

-(void)batteryStateChanged:(id)sender
{

NSArray *stateArray = [NSArray arrayWithObjects:@"未开启监视电池状态",@"电池未充电状态",@"电池充电状态",@"电池充电完成",nil];

NSLog(@"电池状态：%@", [stateArray objectAtIndex:[[UIDevice currentDevice] batteryState]]);

}

[不担心]

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

UIDeviceBatteryStateDidChangeNotification
UIDeviceBatteryLevelDidChangeNotification

监听这两个消息应该就可以了.

[Evanchane]

厉害了的编码了哟