Moving an UIView containing Buttons stops Buttons responding

I have an XIB file containing a subview (footerButtonsView) containing two buttons. I change the position of the subview like so:

if (footerView.frame.origin.y < 280.0) {    
    [footerButtonsView setFrame:CGRectMake(footerButtonsView.frame.origin.x, footerBut开发者_Go百科tonsView.frame.origin.y+300.0-footerView.frame.origin.y, footerButtonsView.frame.size.width, footerButtonsView.frame.size.height)];
}

This moves the view containing the buttons as expected but the buttons would not react to touches anymore. Does anyone have an idea on what I'm missing here? Thanks!

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Looks like you're moving the view outside the bounds of its parent view?