Cocoa - NSCollectionView和NSCollectionViewItem之间的链接在哪里？ Xcode 6 Bug？ [英] Cocoa - Where is the link between a NSCollectionView and a NSCollectionViewItem? Xcode 6 Bug?

问题描述

将NSCollectionView拖动到视图时，NSCollectionViewItem会显示在故事板上，四处飘动。

When you drag a NSCollectionView to a view, a NSCollectionViewItem appears on the storyboard, floating around.

想象一下，我将几个NScollectionViews拖动到同一个视图。我将有一堆NSCollectionViewItems。集合视图如何知道哪个NScollectionViewItem属于它？在接口构建器上可以看到两者之间的连接？我没有看到任何东西在界面生成器？我在哪里可以看到？

Imagine I drag several NScollectionViews to the same view. I will have a bunch of NSCollectionViewItems. How a collection view knows which NScollectionViewItem belongs to it? Is there a connection between the two that can be seen on interface builder? I don't see anything on interface builder? Where to do I see that?

编辑：显然这似乎是一个Xcode错误。当你添加一个NSCollectionView到故事板，它没有一个链接到NSCollectionViewItem，它似乎是不可能的，它们之间连接itemPrototype插座。

Apparently this seems to be a Xcode bug. When you add a NSCollectionView to the storyboard, it comes without a link to the NSCollectionViewItem and it seems to be impossible to connect the itemPrototype outlet between them.

bug这样，他们的答案是：这是一个与OS X上的故事板的已知问题。使用Xibs代替。我的建议是：不要使用OS X的故事板。事情是半熟并且充满了bug。

After contacting Apple about bugs like this, their answer was: "this is a know issue with Storyboards on OS X. Use Xibs instead." My advice to you is: never use storyboards with OS X. The thing is half cooked and full of bugs.

编辑：今天，一年后，Xcode 7.1仍然存在这个错误。建议仍然有效。不要在你的OS X应用程序使用storyboards，直到苹果在未来10年修复这个问题...

today, one year later, the bug still exists on Xcode 7.1. The advice is still valid. Don't use storyboards with your OS X apps, until Apple fixes this in the next 10 years...

推荐答案

我给@ RubberDuck的解决方法去了，但它没有工作（参见我的评论）。对我有用的是在视图控制器（Xcode 6.1）的 viewDidLoad 中设置 collectionView.itemPrototype ：

Well, I gave @RubberDuck's workaround a go but it didn't work (see my comment). What worked for me is setting collectionView.itemPrototype in viewDidLoad of the view controller (Xcode 6.1):

@IBOutlet weak var collectionView: NSCollectionView!

override func viewDidLoad() {
    // don't forget to set identifier of CollectionViewItem 
    // from interface builder
    let itemPrototype = self.storyboard?.instantiateControllerWithIdentifier("collectionViewItem")
        as NSCollectionViewItem
    self.collectionView.itemPrototype = itemPrototype
}

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