deletePlaceholder()
Removes an unneeded placeholder cell altogether from the collection view.
Declaration
func deletePlaceholder() -> BoolReturn Value
true if the placeholder cell was removed, or false if the cell was no longer in the collection view.
Discussion
Use this method to remove a placeholder cell without swapping in a new cell. You might call this method if the user chooses to undo the insertion of a cell or if the contents of the collection view changed.