Xcode 7，iOS 9和Swift 2.0使ViewController的生命周期变得很奇怪
[英]Xcode 7, iOS 9 and Swift 2.0 makes the life cycle of the ViewController very weird
问题描述
In Swift 2.0, I push a ViewController ,and the VC is init from the Xib,The problem is coming：the VC load is very slow.
在Swift 2.0中，我推了一个ViewController，VC是从Xib初始化的，问题来了：VC的加载非常慢。 If I do something in the VC's ViewDidLoad, the VC display may need 5 second Or longer. 如果我在VC的ViewDidLoad中执行某些操作，则VC显示可能需要5秒或更长时间。 IOS 9 before using SizeClass, the VC view's size is correct in viewWillAppear, but in iOS 9, view'size is actually 600 * 600 in ViewWillAppear and only in ViewDidAppear to get the correct size, now a lot of operations can not be written inside, can not be written in ViewDidLoad or ViewWillAppear , can only be written in ViewDidAppear.
iOS 9在使用SizeClass之前，VC视图的大小在viewWillAppear中是正确的，但是在iOS 9中，View'size在ViewWillAppear中实际上是600 * 600，只有在ViewDidAppear中才能获得正确的大小，现在很多操作都无法写入里面，不能写在ViewDidLoad或ViewWillAppear中，只能写在ViewDidAppear中。
1 个解决方案
解决方案1
2 2015-10-19 06:22:34
You better use viewWillLayoutSubviews instead. 您最好改用viewWillLayoutSubviews 。 viewWillAppear is not recommended for frame related operations. 不建议将viewWillAppear用于与框架相关的操作。
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