Could not instantiate class named NSLayoutConstraint

最新推荐文章于 2017-04-22 16:59:54 发布

pqf523

最新推荐文章于 2017-04-22 16:59:54 发布

阅读量128

点赞数

CC 4.0 BY-SA版权

分类专栏： IOS

本文链接：https://blog.youkuaiyun.com/pqf523/article/details/84319261

IOS 专栏收录该内容

9 篇文章

订阅专栏

本文介绍了一个关于iOS应用在使用Xcode 4.5 Interface Builder创建界面时出现的应用崩溃问题。该问题仅在iOS 6及更高版本上出现，而在更早版本中则无法运行。文章提供了详细的解决方案，包括如何在Xcode的Interface Builder中关闭“使用自动布局”选项。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

错误提示:Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named NSLayoutConstraint'

I believe this is an issue with Xcode's new interface builder. Did you happen to build your .xib using Xcode 4.5's interface builder? I've run into this same problem just now, and I think that's the problem. My app runs on iOS 6, but not anything older.

And you need to make sure you turn off "use auto layout" for your nibs.

That can be done by

In the main view of your xib, under File Inspector tab, in Interface builder Document section on the right toolbar. There is a checkmark "Use AutoLayout"