macOS NSTabViewController centered tab icons

Question

I have a macOS app I have created. And I have a Preferences window built using a swift & storyboard with a tabless Toolbar styled NSTabViewController.

I see no way to override the positioning of the tab icons though - they default to the left side of the window. Is it possible?

score 3 · Accepted Answer · answered Jul 06 '18 at 11:46

3

Subclass NSTabViewController and override func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier]. Add a flexibleSpace toolbar item at both sides.

answered Jul 06 '18 at 11:46

Willeke

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that was super easy! thanks. ill post ,my particular solution below as it may help others – gypsyDev Jul 06 '18 at 18:54

score 1 · Answer 2 · answered Jul 06 '18 at 18:57

following Willeke's tip, I came up with this override in my NSTabViewController subclass:

override func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {

    super.toolbarDefaultItemIdentifiers(toolbar)

    var arr = Array<NSToolbarItem.Identifier>()
    for item in self.tabViewItems {
        if let identifier = item.identifier {
            arr.append(NSToolbarItem.Identifier.init(identifier as! String))
        }
    }

    //insert flexible spaces at first and last index
    arr.insert(NSToolbarItem.Identifier.flexibleSpace, at: 0)
    arr.append(NSToolbarItem.Identifier.flexibleSpace)

    return arr
}

Why not just `var arr = super.toolbarDefaultItemIdentifiers(toolbar)`? — Vadim, Dec 07 '18 at 14:01

score 0 · Answer 3 · edited Aug 30 '23 at 16:19

OC:

-(NSArray<NSToolbarItemIdentifier> *)toolbarDefaultItemIdentifiers:(NSToolbar *)toolbar{
    NSMutableArray *arr = [[super toolbarDefaultItemIdentifiers:toolbar] mutableCopy];
    [arr insertObject:[[NSToolbarItem alloc] initWithItemIdentifier:NSToolbarFlexibleSpaceItemIdentifier].itemIdentifier atIndex:0];
    [arr addObject:[[NSToolbarItem alloc] initWithItemIdentifier:NSToolbarFlexibleSpaceItemIdentifier].itemIdentifier];
    return arr;
}

score 0 · Answer 4 · edited Jan 17 '22 at 07:41

0

Swift：

override func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
    var array = super.toolbarDefaultItemIdentifiers(toolbar)
    array.insert(NSToolbarItem.Identifier.flexibleSpace, at: 0)
    array.append(NSToolbarItem.Identifier.flexibleSpace)
    return array
}

edited Jan 17 '22 at 07:41

Peter Csala

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answered Jan 17 '22 at 06:51

mapboo

1
1

1

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jan 17 '22 at 07:41

macOS NSTabViewController centered tab icons

4 Answers4