Hide/Show iPhone Camera Iris/Shutter animation

Question

I am not able to Hide the iphone Camera shutter opening animation for my app. I am using UIImagePickerController to access iphone camera and using my own overlay controllers

Answer 1

To expound on Catalin's answer, (which was great btw), I found if you change the method "animateIrisOpen" slightly, the presentation is a fraction better... but noticeable.

- (void) animateIrisOpen {
    if (iris_) {
        iris_.hidden = NO;
        [iris_ performSelector:kIrisSelector];
    }
}