根据光线感应关闭和开启屏幕

UIDevice *_curDevice = [UIDevice currentDevice];

[_curDevice setProximityMonitoringEnabled:YES];

NSNotificationCenter *_defaultCenter = [NSNotificationCenter defaultCenter];

[_defaultCenter addObserverForName:UIDeviceProximityStateDidChangeNotification

object:nil

queue:[NSOperationQueue mainQueue]

usingBlock:^(NSNotification *note) {

if (_curDevice.proximityState == YES) {

NSLog(@"怕是黑屏了吧");

}

else {

NSLog(@"屏幕应该亮了");

}

}];