问题描述
我有自定义的 UILabel，它在 iOS6 和 iOS7 上运行良好.但是在 iOS8 上，这个标签的 (void)layoutSubviews 方法永远不会被调用.我用 initWithFrame 创建了这个标签，所以应该调用这个方法 - 它在另一个 iOS 版本上被调用.iOS8 中的 autoLayout 系统会发生什么?
I have custom UILabel which works fine on iOS6 and iOS7. But on iOS8 this label's (void)layoutSubviews method never get called.I create this label with initWithFrame, so this method should be called - and it's called on another iOS versions.What happens with autoLayout system in iOS8?
推荐答案
我只想添加这个答案，因为问题标题可能会导致很多人在这里遇到类似的问题(比如我).
I just want to add this answer because the question title may lead a lot of ppl here with similar issues (like me).
iOS 8 到 8.0.2 LayoutSubviews 调用不可靠.它们可能永远不会被调用，或者(在我的情况下)被循环调用.
With iOS 8 to 8.0.2 LayoutSubviews calls are unreliable. They may not be called ever or (in my case) are called in a loop.
即使您不应该这样做，在 LayoutSubviews 中分配内容也是相当安全的，但是这种错误 (?!) 行为可能会导致难以追踪的错误.
Even though you should not do it, it was pretty safe to alloc stuff in LayoutSubviews, but with this buggy (?!) behaviour it can cause hard-to-trace bugs.
我不知道 8.1 是否解决了所有问题，但客户设备运行 8.1 并且他们现在确实运行 8.0.2 还需要一段时间
I don't know if 8.1 fixes all the issues but it will be some time until customer devices will run 8.1 and they do run 8.0.2 NOW
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