Torch/Flash flickers once before staying on

Question

I am using code (which I used before XCode 4 in another project) and now if I switch my flashlight on, it flashes once before it stays on.

Like so: -*-**** where -=off & *=on

The code I am using:

AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (toggleSwitch.on)
{
    NSLog( @"Light ON");

     AVCaptureSession *session = [[AVCaptureSession alloc] init];
     AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
     [session addInput:input];
     AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
     [session addOutput:output];
     [session beginConfiguration];
     [device lockForConfiguration:nil];
     [device setTorchMode:AVCaptureTorchModeOn];
     [device unlockForConfiguration];
     [session commitConfiguration];
     [session startRunning];
    [self setAVSession:session];
    [output release];
    [session release];

}
else
{
    NSLog( @"Light OFF");

     [AVSession stopRunning];
     [AVSession release],AVSession = nil;

}

Switching it off works normal/fine.

Why would this happen? - How can I solve this problem?

That is the red-eye / blink reduction tactic in action. – nobody Nov 02 '11 at 14:08 — nobody, Nov 02 '11 at 14:08

score 0 · Accepted Answer · edited May 23 '17 at 10:24

0

Checkout the answer on this Post - works much better with no flashing.

Turn on torch/flash on iPhone

edited May 23 '17 at 10:24

Community

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answered Jan 24 '12 at 11:08

Ben

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Torch/Flash flickers once before staying on

1 Answers1