iOS: How to get the selected UIMenuItem from UIMenuController

Question

I am trying to use UIMenuCnotroller to show a list of dynamically generated items, they share the same action method, and so I need to know which item is selected in the single action method.

However, in the action method - (void)menuItemAction:(id)sender;the sender is actually the UIMenuController object, and I didn't find any method of UIMenuController can tell me which menuitem is selected.

One solution I can think of is to dynamically generate different action selectors for different items, and do some tricks in forwardInvocation

But is there any easier way?

Igor · Answer 1 · 2012-01-09T08:30:38.887

2

You can use UIMenuCnotroller like: 1) creation:

UIMenuController *menuController = [UIMenuController sharedMenuController];
        UIMenuItem *open = [[UIMenuItem alloc] initWithTitle:@"Open" action:@selector(open:)];
        UIMenuItem *reDownload = [[UIMenuItem alloc] initWithTitle:@"Re-Download" action:@selector(reDownload:)];

        [menuController setMenuItems:[NSArray arrayWithObjects:open, reDownload, nil]];
        [menuController setTargetRect:cell.frame inView:self.view];
        [menuController setMenuVisible:YES animated:YES];

        [open release];
        [reDownload release];

2) To catch actions should implement next methods:

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

    if (selector == @selector(reDownload:))
    {
        return YES;
    }

    return NO;
}

- (BOOL) canBecomeFirstResponder 
{
    return YES;
}

3) And realization of yours methods:

- (void) open:(id) sender 
{
    [self doSomething];
}

- (void) reDownload:(id) sender 
{
[self doSomething];
}

Hope, this helps.

edited Jan 09 '12 at 08:30

answered Jan 06 '12 at 11:33

Igor

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Thanks. This is different from what I need, in my case the two menu items want to shard the same action. For example, put two file names to two menu items, then they will share the same -(void)open:(id)sender – Hao Gong Jan 09 '12 at 04:45
Yes, but you can realize the same methods in differents actions methods. In other words, has 2 items and 2 differents actions. In the body of each actons you can define what items has been selected and call share method. – Igor Jan 09 '12 at 08:37
Just take opening files as an example, assume that we want to show a menu, each item of which shows a file name in app's document folder, and tap it will load the file. In this case we don't know how many files should be shown until running, so we can't assign different methods to different menu items, unless to use a fake selector and leverage [NSObject forwardInvocation:] – Hao Gong Jan 09 '12 at 23:00
Hi krock. I want to intercept when copy, cut or paste from menu items are selected.. Iam using selectors copy: , paste: and cut: in canPerformAction method and it is not working. Any clue.. – Muhammad Irfan Apr 24 '14 at 12:40

Durai Amuthan.H · Answer 2 · 2016-01-25T09:23:57.520

1

One easiest way would be to use different @selector method for each menu item

Examples:

UIMenuItem *oneObj = [[UIMenuItem alloc] initWithTitle:@"One" action:@selector(One:)];

UIMenuItem *twoObj = [[UIMenuItem alloc] initWithTitle:@"Two" action:@selector(Two:)];

edited Jan 25 '16 at 09:23

answered Aug 09 '13 at 12:39

Durai Amuthan.H

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You shouldn't capitalise variable names or method names. – Tim Vermeulen Jan 22 '16 at 22:04
Now I have applied the naming convention – Durai Amuthan.H Jan 25 '16 at 09:24

score 1 · Accepted Answer · edited May 23 '17 at 12:32

1

Okay, I've solved this one. It involves messing with [NSObject forwardInvocation:] and is a bit dirty, but the resulting code is quite minimal. Answered over here: https://stackoverflow.com/a/9874092/790036

edited May 23 '17 at 12:32

Community

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1

answered Mar 26 '12 at 14:35

sobri

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Yes eventually I took a similar solution. – Hao Gong Apr 09 '12 at 14:18

iOS: How to get the selected UIMenuItem from UIMenuController

3 Answers3