xcode常见错误

------------------------------------------错误列表----------------------------------------------

 

1.Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter' 

 原因:集合视图 没有指定 layout 

 

2.Terminating app due to uncaught exception 'Cannot Install Constraint', reason: 'No common superview between views

原因: 没有添加到父视图上

 

3. +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:]: A constraint cannot be made between a leading/trailing attribute and a right/left attribute. Use leading/trailing for both or neither.'

原因:自动布局 属性对应错误

 

 4.Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'could not dequeue a view of kind: UICollectionElementKindCell with identifier pictureCellId - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'

原因:使用到了没有注册的 cell id

 

5.Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Weibo.BaseNavViewController back]: unrecognized selector sent to instance 0x7f951b820000'

原因没有实现方法选择器对应的方法 

 

6.CUICatalog: Invalid asset name supplied:

原因:图片资源的文件名称 在使用的时候 传递的是一个 ""