What is the real difference between UIView
methods setNeedsLayout
and setNeedsDisplay
?
As usual documentation is foggy about this.
Actually the documentation is pretty clear about this:
setNeedsLayout will layout subviews
Call this method on your application's main thread when you want to adjust the layout of a view's subviews.
setNeedsDisplay will call for a redraw of your view ( drawRect:
, etc).
You can use this method or the setNeedsDisplayInRect: to notify the system that your view's contents need to be redrawn.
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