键盘添加撤销操作

CustomKeyboard/View/KBKeyBoardMainView.h

@@ -23,6 +23,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 /// 点击了右侧设置按钮
 - (void)keyBoardMainViewDidTapSettings:(KBKeyBoardMainView *)keyBoardMainView;
+/// 点击了撤销删除按钮
+- (void)keyBoardMainViewDidTapUndo:(KBKeyBoardMainView *)keyBoardMainView;
 
 /// emoji 视图里选择了一个表情
 - (void)keyBoardMainView:(KBKeyBoardMainView *)keyBoardMainView didSelectEmoji:(NSString *)emoji;