iOS 9 Segue导致应用程序冻结（没有崩溃或错误抛出）

问题描述：

我已经在这个应用程序上工作了好几个月，从我记忆中来看，我从来没有遇到过segue的问题。代码在调用 performSegueWithIdentifier 方面没有变化，但自从我最近更新到Xcode 7和iOS 9后，我无法解决这个问题。

I have been working on this app for months now and from as far back as I can remember I have never had an issue with segues. The code is unchanged in terms of calling performSegueWithIdentifier but since my recent update to Xcode 7 and iOS 9 I have not been able to tack this issue.

我试过：

删除按钮并创建新按钮w / segue链接

使用直接按钮来查看，不使用 performSegueWithIdentifier

将按钮连接到新的空白viewController

当我按下按钮时，目标VC上没有调用初始加载功能（例如： ViewDidLoad ， ViewWillAppear 等）。当我将它连接到空白视图时，segue可以正常使用相同的代码。

When I press the button, no initial load functions are called on the destination VC (Ex: ViewDidLoad, ViewWillAppear, etc). When I connect it to a blank view, the segue works fine with the same code in place.

由于代码永远不会停止或中断，并且只是在Xcode上运行时似乎冻结，我似乎无法将其缩小到最低限度造成这个问题。我有一个类似的segue也可以从同一个ViewController上的另一个按钮调用，它没有任何问题。

Since the code never stops, or breaks, and just seems to "freeze" in place while still running on Xcode I can't seem to even narrow this down to whats causing the issue. I have a similar segue that is also called from another button on the same ViewController that has no issues whatsoever.

对此事的任何想法都非常感谢！

Any thoughts on the matter are greatly appreciated!

编辑：我有将问题缩小到导致问题的 UITextView 。一旦删除了文本视图，页面就会通过segue加载。我想知道iOS 8和iOS 9在 UITextView 方面有什么变化，因为我必须删除文本视图并完全重新添加新的文本视图。

I have narrowed the issue down to the UITextView's causing the problem. Once the Text Views were removed the page loads fine via segue. I wonder what changed between iOS 8 and iOS 9 in terms of UITextView as I will have to remove the text views and completely re add new text views.

答

所以基本上segue因为我在 UITextView 中使用而冻结了code> destinationViewController 。以下修复了此问题：

So basically the segue was freezing because of the UITextView's I was using in the destinationViewController. The following fixed the issue:

删除所有 UITextView 的

添加新的UITextView的
- 你必须保留默认的lorem强制文本并在 viewDidLoad中以编程方式更改（）
- Delete all UITextView's
- Add new UITextView's
  - you must leave the default lorem imposed text and change this programmatically in the viewDidLoad()
  这是我的修复，从我在这个问题上所做的研究来看，这似乎是iOS 9和Xcode 7中的一个错误。
  
  This was the fix for me, and from the research I have done on the issue it seems this is a bug in iOS 9 and Xcode 7.
  
  干杯！
  
  注意：删除UITextView中的文本（或使其长度超过12个字符）足以解决它，不需要删除并重新创建它们。 这在Xcode 7.1.1及更高版本中得到修复。
  
  NOTE: Removing the text in the UITextView (or making it longer then ~12 characters) is sufficient to work around it, no need to delete and recreate them. This is fixed in Xcode 7.1.1 and later.

iOS 9 Segue导致应用程序冻结（没有崩溃或错误抛出）

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