CODEWITHSUNDEEP
iosautolayoutsetneedsdisplay
Duck
Duck

Reputation: 35953

setNeedsLayout and setNeedsDisplay

What is the real difference between UIView methods setNeedsLayout and setNeedsDisplay?

As usual documentation is foggy about this.

Upvotes: 72

Views: 36390

Answers (1)

Joris Kluivers
Joris Kluivers

Reputation: 12081

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.

Upvotes: 104

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