如何以编程方式展开和折叠部分NSSplitView？

Question

我想,以取代RBSplitView与NSSplitView我现有的项目.该应用程序现在只有豹子,我想用Leopard附带RBSplitView的新产品 替换NSSplitView.

不过,我错过RBSplitView的便利方法expand和collapse在NSSplitView.如何以编程方式展开和折叠部分NSSplitView？

Answer 1

只需隐藏您想要折叠的子视图,例如

[aSubViewToCollapse setHidden:YES];

您可能还希望实现委托方法 - (BOOL)splitView:shouldHideDividerAtIndex:返回YES以在折叠时隐藏分隔符.

Answer 2

我刚刚进行了程序化扩展和崩溃NSSplitView工作.NSSplitView每当双击分割器时,我还配置了我的扩展/折叠子视图,所以我希望这对于该功能很好玩(似乎).这就是我做的:

(在这个例子中,splitView是我NSSplitView自己,splitViewSubViewLeft是我希望展开/折叠的子视图,lastSplitViewSubViewLeftWidth是一个类型的实例变量CGFloat.)

// subscribe to splitView's notification of subviews resizing
// (I do this in -(void)awakeFromNib)
[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(mainSplitViewWillResizeSubviewsHandler:)
 name:NSSplitViewWillResizeSubviewsNotification
 object:splitView
 ];

// this is the handler the above snippet refers to
- (void) mainSplitViewWillResizeSubviewsHandler:(id)object
{
    lastSplitViewSubViewLeftWidth = [splitViewSubViewLeft frame].size.width;
}

// wire this to the UI control you wish to use to toggle the
// expanded/collapsed state of splitViewSubViewLeft
- (IBAction) toggleLeftSubView:(id)sender
{
    [splitView adjustSubviews];
    if ([splitView isSubviewCollapsed:splitViewSubViewLeft])
        [splitView
         setPosition:lastSplitViewSubViewLeftWidth
         ofDividerAtIndex:0
         ];
    else
        [splitView
         setPosition:[splitView minPossiblePositionOfDividerAtIndex:0]
         ofDividerAtIndex:0
         ];
}

Answer 3

我尝试了上面的解决方案,发现它不起作用,因为isSubviewCollapsed从未返回YES

这些建议的组合产生了有效的结果

if ([splitViewTop isHidden]) {
    [splitViewTop setHidden:NO];
    [split
     setPosition:previousSplitViewHeight
     ofDividerAtIndex:0];
}
else {
    [splitViewTop setHidden:YES];
}
[split adjustSubviews];

Answer 4

在 El Capitan，这对我有用。

splitViewItem.collapsed = YES;