Touch and pull down a view

Question

I have a uiview at the top of the interface (below the status bar) that only the bottom part of it is shown.

Actually, I want to make the red uiview to slide down

Answer 1

Make a subclass of UIView.

Override touchesBegan:withEvent and touchesMoved:withEvent.

In the touchesBegan perhaps make a visual change so the user knows they are touching the view. In the touchesMoved use [[touches anyObject] locationInView:self] and [[touches anyObject] previousLocationInView:self]

to calculate the difference between the current touch position and the last touch position (detect drag down or drag back up).

Then if you're custom drawing, call [self setNeedsDisplay] to tell your view to redraw in it's drawRect:(CGRect)rect method.

Note: this assumes multiple touch is not used by this view.