CameraOverlayView to crop result in UIImagePickerController

Question

When I use UIImagePickerControllerwith cameraOverlayView, can I get only a select area from my overlay view?

http://tinyurl.com/2fqy9nq

Answer 1

• Add a UIImageView as a child of your CameraOverlayView.
• Create a black PNG size of 320x480. Cut a rectangle in the middle to create a hole (transparent pixels).
• Assign a PNG image to UIImageView.

Alternatively, you can overwrite your CameraOverlayView - (void)drawRect:(CGRect)rectas follows (untested from my head):

// Request draw context
CGContextRef context = UIGraphicsGetCurrentContext();

// Draw background        
CGContextSetRGBFillColor(context, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextFillRect(context, rect);

// Cut hole
CGContextSetBlendMode(context, kCGBlendModeClear);
CGContextFillRect(context, CGRectMake(40, 40, 100, 100);

- Faces (http://faces.pixelshed.net/). , .