我有这个UIView子类:classEmptyAlbumsView:UIView{classfuncinstanceFromNib()->EmptyAlbumsView{returnR.nib.emptyAlbumsView.firstView(owner:nil)!asEmptyAlbumsView}//MARK:-IBActions@IBActionfuncdidTapFreeAlbumButton(sender:UIButton){print("Tappingbutton")print(didTapFreeAlbumButtonClosure)didTapFreeAlbumBut