12 *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key icon.'

"this class is not key value coding-compliant for the key …"问题的解决

此问题 一般都是由interface build与代码中IBOutlet的连接所引起的。

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key icon.'

原因:这种错误一般是xib拖线删除了变量,没有在XIB中删除

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