ios6.0以前版本开发 异常信息：reason: ‘Could not instantiate class named NSLayoutConstraint’
2013-01-19 20:44
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ios6版本出来新特性：auto layout属性，此属性只针对ios6及以上版本；
ios6以下版本运行时出现异常信息：Terminating app due to uncaught exception ‘NSInvalidUnarchiveOperationException’, reason: ‘ Could not instantiate class named NSLayoutConstraint
‘
具体场景：Xcode 4.5 选择iPhone、iPad 5.0/5.1 Simulator（模拟器）
解决办法：需要关闭storyboard或xib界面文件的Use Auto Layout 选项，这是因为Auto Layout特性是iOS 6 新增加的，在之前的 5.0/5.1 Simulator模拟器中不支持。
参考网址：http://www.cocoachina.com/bbs/read.php?tid=116558
ios6以下版本运行时出现异常信息：Terminating app due to uncaught exception ‘NSInvalidUnarchiveOperationException’, reason: ‘ Could not instantiate class named NSLayoutConstraint
‘
具体场景：Xcode 4.5 选择iPhone、iPad 5.0/5.1 Simulator（模拟器）
解决办法：需要关闭storyboard或xib界面文件的Use Auto Layout 选项，这是因为Auto Layout特性是iOS 6 新增加的，在之前的 5.0/5.1 Simulator模拟器中不支持。
参考网址：http://www.cocoachina.com/bbs/read.php?tid=116558
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