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- (IBAction)openFlash:(id)sender { AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if ([device hasTorch] && [device hasFlash]) { [device lockForConfiguration:nil]; if (hasClosed) { [device setTorchMode:AVCaptureTorchModeOn]; } else { [device setTorchMode:AVCaptureTorchModeOff]; } [device unlockForConfiguration]; } }