How do I limit an objects movement in xcode for iphone?

Question

Hi all,

this is my first ever question so apologies if it's not descriptive enough.

I currently have an object that can be moved along an x axis with dragging. I need to limit it's movement to half of the screen.

Can anyone help

Answer 1

Well that is simple. Assuming we are talking about moving a UIView:

// Only move the object if its right bounding box position is
// in the first half of the screen

if ((someObjectView.frame.origin.x + someObjectView.frame.size.width) < 
        (containingView.bounds.size.width / 2.0) {
    // Move the object
}

You fill in the blanks :-)