UIScrollView 损坏并停止使用 OpenGL 渲染滚动(相关 CADisplayLink、NSRunLoop) [英] UIScrollView broken and halts scrolling with OpenGL rendering (related CADisplayLink, NSRunLoop)

问题描述

解决方案说明，不是问题.

Solution note, Not a question.

UIScrollView 通过防止在 CADisplayLink 向 NSDefaultRunLoopMode 注册时触发 CADisplayLink 滴答声来暂停 OpenGL 渲染.

UIScrollView suspends OpenGL rendering by preventing firing CADisplayLink tick when CADisplayLink registered with NSDefaultRunLoopMode.

但是，如果你使用 NSRunLoopCommonModes 来解决这个问题，UIScrollView 将在突发滚动时停止滚动.并且一旦停止，它就不会再次滚动.(破碎)

But, if you use NSRunLoopCommonModes to solve this, UIScrollView will halt scrolling at burst scrolling. And after once halted, it does not scroll again. (broken)

并在其他线程/运行循环中注册 CADisplayLink(如本问题的回答所述:CADisplayLink 在 UIScrollView 滚动时停止更新) 减少 UIScrollView 行为中断，但无法消除.

And registering CADisplayLink in other thread/runloop (as described in answer of this question: CADisplayLink stops updating when UIScrollView scrolled) reduces UIScrollView behavior breaking, but cannot eliminate.

推荐答案

使用UITrackingRunLoopMode.它专为滚动内容而设计.

Use UITrackingRunLoopMode. It's specifically designed for scrolling stuffs.

否则，调用 render &也可以在 -scrollViewDidScroll 中显示代码，而不仅仅是在 CADisplayLink 的刻度回调中.

Otherwise, call render & present code at -scrollViewDidScroll too, not only in CADisplayLink's tick callback.

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