cocoa - NSToolbarItem 可用性基于 OS X 版本

Question

我有一个可在多个 OS X 版本上使用的应用程序。使 NSToolbarItem 仅适用于某些操作系统版本的用户的最佳方法是什么。当它不可用时，应该将其完全隐藏，而不仅仅是禁用。

为了简单起见，如何以编程方式从此(下方)菜单中删除工具栏项？

编辑:我尝试在委托(delegate)中重写toolbarAllowedItemIdentifiers:，如下所示:

- (NSArray *)toolbarAllowedItemIdentifiers:(NSToolbar *)toolbar {
    NSLog(@"Toolbar requesting allowed items.");
    NSMutableArray *array = [NSMutableArray array];
    [array addObject:@"TPUpToolbarItem"];
    [array addObject:@"TPDownToolbarItem"];
    [array addObject:@"TPResetToolbarItem"];
    [array addObject:@"TPSpeedToolbarItem"];
    [array addObject:@"TPGroupToolbarItem"];
    [array addObject:@"TPBackgroundToolbarItem"];
    [array addObject:NSToolbarShowFontsItemIdentifier];
    if (floor(NSAppKitVersionNumber) <= 1038) {
        NSLog(@"Below Lion, adding Fullscreen item.");
        [array addObject:@"TPFSToolbarItem"];
    }
    [array addObject:@"TPFlipHToolbarItem"];
    [array addObject:@"TPFlipVToolbarItem"];
    [array addObject:NSToolbarFlexibleSpaceItemIdentifier];
    [array addObject:NSToolbarSpaceItemIdentifier];
    [array addObject:NSToolbarSeparatorItemIdentifier];
    [array addObject:NSToolbarShowColorsItemIdentifier];
    [array addObject:NSToolbarPrintItemIdentifier];
    return array;
}

所有其他工具栏项目都按正确的顺序显示，但全屏项目是最后一个，而且仍然在那里。

提前致谢。

Answer 1

除了 -toolbarAllowedItemIdentifiers: 之外，不要忘记 -toolbarDefaultItemIdentifiers:。尝试如下操作:

enum {
    MDUndeterminedVersion    = 0,
    MDTiger                  = 0x1040,
    MDLeopard                = 0x1050,
    MDSnowLeopard            = 0x1060,
    MDLion                   = 0x1070,
    MDMountainLion           = 0x1080,
    MDMavericks              = 0x1090,
    MDUnknownVersion         = 0x1100 // ??
};

static SInt32 MDSystemVersion = MDUndeterminedVersion;

+ (void)initialize {
    if (MDSystemVersion == MDUndeterminedVersion) {
        SInt32 MDFullSystemVersion = 0;
        Gestalt(gestaltSystemVersion, &MDFullSystemVersion);
        MDSystemVersion = MDFullSystemVersion & 0xfffffff0;
    }
}

- (NSArray *)toolbarAllowedItemIdentifiers:(NSToolbar *)toolbar {
    NSLog(@"Toolbar requesting allowed items.");
    NSMutableArray *array = [NSMutableArray array];
    [array addObject:@"TPUpToolbarItem"];
    [array addObject:@"TPDownToolbarItem"];
    [array addObject:@"TPResetToolbarItem"];
    [array addObject:@"TPSpeedToolbarItem"];
    [array addObject:@"TPGroupToolbarItem"];
    [array addObject:@"TPBackgroundToolbarItem"];
    [array addObject:NSToolbarShowFontsItemIdentifier];
    if (MDSystemVersion < MDLion) {
        NSLog(@"Below Lion, adding Fullscreen item.");
        [array addObject:@"TPFSToolbarItem"];
    }
    [array addObject:@"TPFlipHToolbarItem"];
    [array addObject:@"TPFlipVToolbarItem"];
    [array addObject:NSToolbarFlexibleSpaceItemIdentifier];
    [array addObject:NSToolbarSpaceItemIdentifier];
    [array addObject:NSToolbarSeparatorItemIdentifier];
    [array addObject:NSToolbarShowColorsItemIdentifier];
    [array addObject:NSToolbarPrintItemIdentifier];
    return array;
}

--

- (NSArray *)toolbarDefaultItemIdentifiers:(NSToolbar *)toolbar {
    NSLog(@"Toolbar requesting default items.");
    NSMutableArray *array = [NSMutableArray array];
    [array addObject:@"TPUpToolbarItem"];
    [array addObject:@"TPDownToolbarItem"];
    [array addObject:@"TPResetToolbarItem"];
    [array addObject:@"TPSpeedToolbarItem"];
    [array addObject:@"TPGroupToolbarItem"];
    [array addObject:@"TPBackgroundToolbarItem"];
    [array addObject:NSToolbarShowFontsItemIdentifier];
    if (MDSystemVersion < MDLion) {
        NSLog(@"Below Lion, adding Fullscreen item.");
        [array addObject:@"TPFSToolbarItem"];
    }
    [array addObject:@"TPFlipHToolbarItem"];
    [array addObject:@"TPFlipVToolbarItem"];
    [array addObject:NSToolbarFlexibleSpaceItemIdentifier];
    [array addObject:NSToolbarSpaceItemIdentifier];
    [array addObject:NSToolbarSeparatorItemIdentifier];
    [array addObject:NSToolbarShowColorsItemIdentifier];
    [array addObject:NSToolbarPrintItemIdentifier];
    return array;
}

请注意，如果您为工具栏设置了允许用户自定义，则可能需要删除应用程序首选项文件才能注意到工具栏设置中的更改。