Question

I have Several UIImageViews in a NSMutableArray. They are all in the superView. I want to check if a UIImageView intersects (collides, hits or touches) another UIImageView in the array. This is what I have been doing but I think there should be a better way.

for (UIImageView *b in _blocks) {
    for (UIImageView *b2 in _blocks) {
        if (CGRectContainsPoint(b2.frame, CGPointMake(b.center.x, b.center.y + b.frame.size.height/2))) {
            // Do something
        }

    }

}

If I want to check if the image view is touching more than 2 views this way, the code is going to get very nasty. Thats why I want to know a better way to do it.

Answer 1

Do this:

 NSMutableArray *arrIntersect = [NSMutableArray array];
 for (UIImageView *b in _blocks) {
    for (UIImageView *b2 in _blocks) {
         if (b != b2 && CGRectIntersectsRect(b2.frame, b.frame)) {
            if(arrIntersect.count > 2)
               //count > 2
            else
               [arrIntersect addObject:b2];
        }
    }
}