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我有一个气球视图，当我点击单元格时 UIMenuController 没有出现。我试图在

  • (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath,

然后我添加了一个长按手势

  • (void)longPress:(UILongPressGestureRecognizer *)recognizer,

最后我在扩展中添加了一个实现

UITableViewCell

课，但它仍然不起作用。

这是一个例子

- (BOOL)canBecomeFirstResponder {
 return YES;
}

- (BOOL) canPerformAction:(SEL)selector withSender:(id) sender 
{   
    return YES;
}

-(void)copyAction:(id)sender{
    NSLog(@"copy");
}

-(void)deleteAction:(id)sender{
    NSLog(@"delete");
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.
    BalloonCell *cell = (BalloonCell*)[tableView cellForRowAtIndexPath:indexPath];

    [self becomeFirstResponder];
    BOOL isCanBecomde = [self canBecomeFirstResponder];
    BOOL isFirst = [self isFirstResponder];

    UIMenuItem *copy = [[UIMenuItem alloc] initWithTitle:@"Копировать" action:@selector(copyAction:)];
    UIMenuItem *delete = [[UIMenuItem alloc] initWithTitle:@"Удалить" action:@selector(deleteAction:)];

    UIMenuController *menu = [UIMenuController sharedMenuController];

    CGRect drawRect = [cell convertRect:cell.bounds toView:self.view];

     [menu setTargetRect:drawRect inView:window];
     [menu setMenuItems:[NSArray arrayWithObjects:copy, delete, nil]];

    [menu setMenuVisible:YES animated:YES];

}

你有任何猜测为什么 UIMenuController 没有出现吗？

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