UIImagePickerController पर कैमरा फ्लैश का उपयोग कैसे करें?

Question

मैं जानना चाहता हूं कि आईआईएम 4 पर UIImagePickerController के साथ कैमरा फ्लैश पर स्विच कैसे करें।

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerCameraDeviceFront] == YES) 
{ 
    /// What code here /// 
} 

else 
{ 
    NoFlash = [[UIAlertView alloc] initWithTitle:@"Uh-Oh" 
             message:@"Your device doesn't have a flash camera" 
             delegate:nil 
           cancelButtonTitle:@"mhmm, OK" 
           otherButtonTitles:nil]; 
    NoFlash.delegate = self; 
    [NoFlash show]; 
    [NoFlash release]; 
} 

}

मैं पहले से ही UIImagePickerController कक्षा संदर्भ वेब पेज यहाँ पढ़ें: http://bit.ly/cdAhhB लेकिन मैं इस सवाल का जवाब नहीं मिला। क्या कोई मेरी सहायता कर सकता है?

धन्यवाद

Answer 1

आप इसका उपयोग कर सकते हैं। मूल रूप से 'टॉगल टॉर्च' को कॉल करें जब आप फ्लैश चालू या बंद करना चाहते हैं। उम्मीद है कि यह वही है जो आप खोज रहे थे।

- (void) toggleTorch { 

    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 

    if ([device hasTorch] && [device hasFlash]){ 

     if (device.torchMode == AVCaptureTorchModeOff) { 

      NSLog(@"It's currently off.. turning on now."); 

      [power setImage:[UIImage imageNamed:@"on@2x.png"] forState:UIControlStateNormal]; 

      AVCaptureDeviceInput *flashInput = [AVCaptureDeviceInput deviceInputWithDevice:device error: nil]; 
      AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init]; 

      AVCaptureSession *session = [[AVCaptureSession alloc] init]; 

      [session beginConfiguration]; 
      [device lockForConfiguration:nil]; 

      [device setTorchMode:AVCaptureTorchModeOn]; 
      [device setFlashMode:AVCaptureFlashModeOn]; 

      [session addInput:flashInput]; 
      [session addOutput:output]; 

      [device unlockForConfiguration]; 

      [output release]; 

      [session commitConfiguration]; 
      [session startRunning]; 

      [self setTorchSession:session]; 
      [session release]; 
     } 
     else { 

      NSLog(@"It's currently on.. turning off now."); 

      [power.imageView setImage:[UIImage imageNamed:@"off@2x.png"]]; 

      [torchSession stopRunning]; 

     } 

    } 

} 

-(IBAction)powerBtn 
{ 
    [self toggleTorch]; 
} 

Answer 2

-(void)flashSelected 
{ 

if (PickerController.cameraFlashMode == 
UIImagePickerControllerCameraFlashModeOff) { 

    if ([UIImagePickerController 
isFlashAvailableForCameraDevice:UIImagePickerControllerCameraDeviceRear ]) 

    { 
     PickerController.cameraFlashMode = 
UIImagePickerControllerCameraFlashModeOn; 
    } 
} 
else 
{ 
    PickerController.cameraFlashMode = 
UIImagePickerControllerCameraFlashModeOff; 
}  
} 

बारी-बारी से ..

-(void)_flashToggle 
{ 
if (! [UIImagePickerController isFlashAvailableForCameraDevice:UIImagePickerControllerCameraDeviceRear ]) 
    return; 

if (PickerController.cameraFlashMode == UIImagePickerControllerCameraFlashModeOff) 
    PickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn; 
else 
    PickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff; 
} 

Answer 3

// not all devices have two cameras or a flash so just check here 
    if ([UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceRear]) { 
     imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceRear; 
     if ([UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceFront]) { 
      cameraSelectionButton.alpha = 1.0; 
      showCameraSelection = YES; 
     } 
    } else { 
     imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront; 
    } 

    // flash mode on 
     if ([UIImagePickerController isFlashAvailableForCameraDevice:imagePicker.cameraDevice]) 
     { 
      imagePicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff; 
      flashModeButton.alpha = 1.0; 
      showFlashMode = YES; 
     }