Question

Is it possible to display a tap-to-focus blue box when a custom overlay is used in a UIImagePickerView and when showsCameraControl attribute is set to FALSE?

Answer 1

The modal camera view already supports touch-to-focus. You need to make your overlay view “transparent” to touches.

Subclass a UIView as OverlayView and add something like this. In my overlay view I have two buttons, which should of course not be transparent for touching.

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {

    if (CGRectContainsPoint(infoButton.frame, point) || CGRectContainsPoint(snapButton.frame, point)) {
        // touched button
        return YES; 
    }

    return NO;
}

There are probably other and more elegant ways to do this.
I think you would also have to add the little “focus rectangle” on your view programmatically.