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drawing asynchronous #3952

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milkatgit opened this issue Apr 18, 2019 · 1 comment
Closed

drawing asynchronous #3952

milkatgit opened this issue Apr 18, 2019 · 1 comment

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@milkatgit
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milkatgit commented Apr 18, 2019 •
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Hi, I have two questions.1. Is the drawing asynchronous? 2. How to know that a drawing has been completed.
@liuxuan30
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liuxuan30 commented Apr 23, 2019 •
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You must know all UI related tasks are performed on main thread, right?

There are design patterns like delegate to let you know when the drawing is complete. I don't think we provide one yet; not getting any requirement for that. Besides, what's your demand to know it's finished?

By concept, I don't think UIKit or CoreGraphics is designed this way. You never call draw() yourself.

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@liuxuan30 @milkatgit