2 (null) in -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] ()
3 (null) in -[UICollectionView _validateSelectionOrHighlightIndexPath:isSelection:allowMassIndexPath:assertIfInvalid:] ()
UICollectionView tries to select a particular IndexPath and finds that the IndexPath is invalid. This usually occurs when the IndexPath does not exist in the current data source.
error info：
0 (null) in __exceptionPreprocess ()
1 (null) in objc_exception_throw ()
2 (null) in -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] ()
3 (null) in -[UICollectionView _validateSelectionOrHighlightIndexPath:isSelection:allowMassIndexPath:assertIfInvalid:] ()
UICollectionView tries to select a particular IndexPath and finds that the IndexPath is invalid. This usually occurs when the IndexPath does not exist in the current data source.