Swift version: 5.10
All views and subclasses are rendered using the drawRect()
method, but you should never call that method directly yourself. Instead, it gets called by the system whenever drawing is required, which allows it to to avoid multiple redraws if drawRect()
is called several times in a row.
Instead, if you want a view to redraw immediately, you should call its setNeedsDisplay()
method like this:
myButton.setNeedsDisplay()
That will ask UIKit to redraw the button using drawRect()
, but only if a redraw is not already queued.
SPONSORED Get accurate app localizations in minutes using AI. Choose your languages & receive translations for 40+ markets!
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 2.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.