iOS8上的火炬轉彎時暗，下面的代碼用於禁用火炬設置AVCaptureTorchModeOff

Question

的inspite在ios7， 工作正常的，但在iOS8上的火炬沾到暗的時候

AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 
        if ([device hasTorch] || [device hasFlash]){ 
         [device lockForConfiguration:nil]; 
         [device setTorchMode:AVCaptureTorchModeOff]; 
         [device setFlashMode:AVCaptureFlashModeOff]; 
         [device unlockForConfiguration]; 
        } 

Answer 1

試試這個代碼，它的工作原理...

- (IBAction)flashOnClicked:(id)sender 
    { 
     AVCaptureDevice *flashLight = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 
     if ([flashLight isTorchAvailable] && [flashLight isTorchModeSupported:AVCaptureTorchModeOn]) 
     { 
      BOOL success = [flashLight lockForConfiguration:nil]; 
      if (success) 
      { 
       if ([flashLight isTorchActive]) 
       { 
        //TURN ON 
        [flashLight setTorchMode:AVCaptureTorchModeOff]; 
       } 
       else 
       { 
        //TURN OFF 
        [flashLight setTorchMode:AVCaptureTorchModeOn]; 
       } 
       [flashLight unlockForConfiguration]; 
      } 
     } 
    }