Problem with the camera flash iphone

Question

I have a switch that if I activate it, I turn on the camera flash and if you turn off, turn off (default is off)

This is my code:

- (void)viewDidAppear:(BOOL)animated

{   

    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera] == NO)
        return;

    picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    picker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType: UIImagePickerControllerCameraCaptureModeVideo];

    picker.allowsEditing = NO;
    picker.showsCameraControls = NO;

    picker.delegate = self;

    [self presentModalViewController:picker animated:YES];  

}

- (IBAction) onChangeSwitch:(id)sender

{

    switch(interruptor.on){
        case YES:
            picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
            break;
        case NO:
            picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;
            break;
    }
}

Looking online, I've seen the code I have is to turn the flash simply and not to start or stop the torch from the iPhone camera.

I've seen it done with the AVCaptureDevice Turn on torch/flash on iPhone # 3367424 I do not know now how could adapt that to my code.

Does anyone know and gives me a hand?

thanks

score 3 · Answer 1 · answered Apr 21 '12 at 05:02

- (void)flashLightOn {


    NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    for (AVCaptureDevice *device in devices) {
        if ([device hasFlash] == YES) {

            [device lockForConfiguration:nil];
            [device setTorchMode:AVCaptureTorchModeOn];
            [device unlockForConfiguration];
        }

    }
}

-(void)flashLightOff {


    NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    for (AVCaptureDevice *device in devices) {
        if ([device hasFlash] == YES) {

            [device lockForConfiguration:nil];
            [device setTorchMode:AVCaptureTorchModeOff];
            [device unlockForConfiguration];
        }

    }

}

score 2 · Answer 2 · answered Aug 09 '11 at 21:07

2

Here is how I turn the light (a.k.a. torch) on & off:

- (void) setTorchOn:(BOOL)isOn
{
    AVCaptureDevice* device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    [device lockForConfiguration:nil]; //you must lock before setting torch mode
    [device setTorchMode:isOn ? AVCaptureTorchModeOn : AVCaptureTorchModeOff];
    [device unlockForConfiguration];
}

I'm pretty sure you'll need to link to the AVFoundation framework.

answered Aug 09 '11 at 21:07

bendytree

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Thank you very much. I'll try to see if I have luck, but I think if I have picker, I can not mix with AvCaputre .. to see if I have luck. Thank you very much again. – jekeyeke Aug 13 '11 at 09:37

Problem with the camera flash iphone

2 Answers2