iPhone 打开和关闭闪光灯代码

Posted 2020-06-14

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//打开闪光灯
-(void)turnOnLed {

 AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

 if ([device hasTorch]) {

  [device lockForConfiguration:nil];

  [device setTorchMode: AVCaptureTorchModeOn];

  [device unlockForConfiguration];

} 

//关闭闪光灯

-(void)turnOffLed {

 AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

 if ([device hasTorch]) {

  [device lockForConfiguration:nil];

  [device setTorchMode: AVCaptureTorchModeOff];

  [device unlockForConfiguration];

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