storyboard上的线没有删除,但是方法已经注释
- 属性被注释
'NSUnknownKeyException', reason: '[<ViewController 0x7fb570d03f30> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key but.'
- 方法被注释
NSInvalidArgumentException', reason: '-[ViewController click:]: unrecognized selector sent to instance 0x7fd4ded04bc0'