当快速点击按钮时，iPhone手电筒应用程序崩溃
我的flashligh应用程序完美运行。出于某种原因，每次我快速点击手电筒按钮，应用程序只是冻结，并没有做任何事情。当我调用AVCaptureSession stopRunning时，它似乎冻结了。这是我的切换手电筒方法的代码。我也希望这种方法最终被称为频闪功能。
- (void)toggleFlashlight{
if (isTorchOn) {
// Start session configuration
[session beginConfiguration];
[device lockForConfiguration:nil];
// Set torch to on
[device setTorchMode:AVCaptureTorchModeOn];
[device unlockForConfiguration];
[session commitConfiguration];
[session startRunning];
}
else {
[session stopRunning];
[session release];
session = nil;
session = [[AVCaptureSession alloc] init];
// Create device input and add to current session
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error: nil];
[session addInput:input];
// Create video output and add to current session
AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
[session addOutput:output];
[output release];
}
}
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- (void)torchOnOff: (BOOL) onOff { AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if ([device hasTorch]) { [device lockForConfiguration:nil]; [device setTorchMode: onOff ? AVCaptureTorchModeOn : AVCaptureTorchModeOff]; [device unlockForConfiguration]; } }豹芜澈