ios - 我无法从自定义 UITableViewCell 中删除自定义 UIButton

Question

在编辑模式下，除了编辑附件之外，我还希望单元格显示一个 uibutton。当 tableView 进入编辑模式时，按钮显示正常并且工作正常。但它永远不会被删除。除了以下代码之外，我还尝试说 myButton.hidden = TRUE。这就是我在自定义 tableViewCell 类中的内容

- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
    [super setEditing:editing animated:animated];

    self.trashButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.trashButton.frame = CGRectMake(337, 17, 27, 30);
    [self.trashButton setBackgroundImage:[UIImage imageNamed:@"trash.png"] forState:UIControlStateNormal];

    if (editing) {
        [self addSubview:self.trashButton];
    } else {

        [self.trashButton removeFromSuperview];
    }
}

Answer 1

正如我在上面的评论中提到的，这样做可能会更好:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated 
{
    [super setEditing:editing animated:animated];

    if (self.trashButton) 
    {
        [self.trashButton removeFromSuperview];
        self.trashButton = nil;
    } 
    else 
    {
         self.trashButton = [UIButton buttonWithType:UIButtonTypeCustom];
         self.trashButton.frame = CGRectMake(337, 17, 27, 30);
         [self.trashButton setBackgroundImage:[UIImage imageNamed:@"trash.png"] forState:UIControlStateNormal];

         [self addSubview:self.trashButton];
    }
}