iOS - Drag and drop collision detection How to detect when your selected item drags over another subview?

Question

We are adding drag and drop functionality to what is to become a sports field with positions for players.

The positions are mapped out using Interface Builder with each

Answer 1

check if the frame of the item you are moving intersects with the frame from on of your subviews

for (UIView *anotherView in self.subviews) {
    if (movingView == anotherView)
        continue;
    if (CGRectIntersectsRect(movingView.frame, anotherView.frame)) {
        // Do something
    }
}

If I were you, I would add all game relevant items to an NSArray and for-loop through this. So you don't detect collisions with subviews that have nothing to do with your game like labels and so on.

Answer 2

Also might want to consider view.center with CGRectContainsPoint()