关于iOS 5 Could not instantiate class named NSLayoutConstraint错误
来源：互联网 发布：java如何编译成class 编辑：程序博客网 时间：2024/05/16 10:27
因为使用Xcode 4.6.2,新建工程的时候SDK 6.1,但是要做低版本适配。在将iOS模拟器选为5.0编译运行时候出现Could not instantiate class named NSLayoutConstraint错误，这个问题原因是iOS 6新添加的AutoLaout属性(关于AutoLayout属性请见 这里)在IOS 5里不支持而使工程崩溃，而Xcode 4.6.2新建的工程是默认使用了AutoLaout属性的.
解决办法:选中XIB或者StoryBoard,在右侧属性面板上去掉AutoLaout的选中状态，如下图
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