小编zai*_*aid的帖子

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.下面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]; …