UIMenuController与UITableViewController不起作用 [英] UIMenuController with UITableViewController doesn't work

问题描述

当用户选择表格中的任何行时，我正在尝试显示 UIMenuController 。我正在使用 UITableViewController 来显示包含自定义单元格的表格。

I am trying to display UIMenuController when user selects any row in the table. I am using UITableViewController to display table with custom cell.

我的代码： -

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
   // [tableView deselectRowAtIndexPath:indexPath animated:NO];

    MyCell *cell = (MyCell *)[tableView cellForRowAtIndexPath:indexPath];
    CGRect cellFrame = cell.frame;

    [self.view becomeFirstResponder];

    UIMenuItem *menuItem = [[UIMenuItem alloc] initWithTitle:@"Item1" action:@selector(action1:)];
    UIMenuItem *menuItem1 = [[UIMenuItem alloc] initWithTitle:@"Item2" action:@selector(action2:)];
    UIMenuItem *menuItem2 = [[UIMenuItem alloc] initWithTitle:@"Item3" action:@selector(action3:)];

    UIMenuController * menuController = [UIMenuController sharedMenuController];
    menuController.menuItems = [NSArray arrayWithObjects:menuItem, menuItem1, menuItem2, nil];
    menuController.arrowDirection = UIMenuControllerArrowDown;

    [menuController setTargetRect:cellFrame inView:self.view];

    [menuController setMenuVisible:YES animated:YES];
}

- (BOOL)canBecomeFirstResponder
{
    return YES;
}

但 UIMenuController 不没有表现出来。上面的代码有什么问题？

But UIMenuController doesn't shown. Whats wrong in above code ?

另外，我提到了这些链接。但没有运气。

Also, I've referred these links. But no luck.

推荐答案

如果您只需长按后显示菜单，则无需使用 tableView：didSelectRowAtIndexPath：并自己显示菜单。

If you're ok with showing the menu only after a long press, there is no need to use tableView:didSelectRowAtIndexPath: and show the menu yourself.

相反，您可以使用此委托方法：

Instead, you can use this delegate method:

- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

要隐藏标准物品（剪切，复制和粘贴），请返回NO这里：

To hide the standard items (cut, copy, and paste), return NO here:

- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
    return NO;
}

然后你需要返回YES 来自 canBecomeFirstResponder 就像你一样，由于某种原因，我也必须实现这个方法：

Then you need to return YES from canBecomeFirstResponder like you have and, for some reason, I had to implement this method too:

- (BOOL)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
    return YES;
}

这篇关于UIMenuController与UITableViewController不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！