iOS 在tableView上消退键盘

给tableView添加手势

UITapGestureRecognizer *gesture = [[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(resignKeyBoardGestureWithTableView:)];

    gesture.cancelsTouchesInView =NO;//当前控件响应后会传播到其他控件上，默认yes

    [tableView addGestureRecognizer:gesture];

#pragma mark --------- 消退键盘 ---------

- (void)resignKeyBoardGestureWithTableView:(UITapGestureRecognizer *)tap

{

    [_searchBar resignFirstResponder];

}