NSOutlineView通过代码展开/折叠动画 [英] NSOutlineView expand / collapse animation from code

问题描述

我想知道如何从代码中动画扩展/折叠NSOutlineView树节点吗？

i'm wondering how does one animate the expansion/collapse of an NSOutlineView's tree node from code ?

// this works ok but doesn't animate  

NSTreeNode *node = [self.outlineView itemAtRow:self.outlineView.clickedRow];

if([self.outlineView isItemExpanded:node])
{
    [self.outlineView.animator collapseItem:node];
}else{
    [self.outlineView.animator expandItem:node];
}

如果通过默认绘制的箭头展开节点，则大纲视图自然会动画

所以有一种方法...

an outline view naturally animates if you expand a node via the default-drawn arrow
so there IS a way...

推荐答案

我的原始代码还可以，这只是' t在10.7下可用

My original code was OK, this just wasn't available under 10.7

中的原始文本OS X v10.8应用程序套件发行说明：

NSOutlineView

NSOutlineView

现在使用以下方法支持通过-animator代理动画：-expandItem :、 -expandItem：expandChildren :、 -collapseItem：和-collapseItem：collapseChildren:。例如，为特定项目的扩展动画：[[outlineView animator] expandItem：item];

The following methods now support being animated via the -animator proxy: -expandItem:, -expandItem:expandChildren:, -collapseItem:, and -collapseItem:collapseChildren:. As an example, to animate the expansion of a particular item: [[outlineView animator] expandItem:item];

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