Swift version: 5.6
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 In-app subscriptions are a pain to implement, hard to test, and full of edge cases. RevenueCat makes it straightforward and reliable so you can get back to building your app. Oh, and it's free if your app makes less than $10k/mo.
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.