NSCollectionView单选不起作用，但是多选很好 [英] NSCollectionView single selection is not working, but multiple selection is fine

问题描述

如标题所述，单选时，我的 NSCollectionView 不起作用.

As title described, my NSCollectionView is not working when single selection.

正确显示MyNSCollectionView，

MyNSCollectionView is rendered correcttly,

下面的代码显示了如何初始化NSCollectionView:

below code shows how I initialize my NSCollectionView:

    self.leftBar.dataSource = self
    self.leftBar.delegate = self

    self.leftBar.isSelectable = true
    self.leftBar.allowsEmptySelection = true

    let layout = NSCollectionViewFlowLayout()
    layout.scrollDirection = .horizontal

    layout.itemSize = NSSize(width: 200 , height: 50)

    leftBar.collectionViewLayout = layout


    self.contentView.addSubview(leftBar)

    leftBar <- [
        Top(),
        Left(),
        Bottom(),
        Width(200)
    ]

自定义NSCollectionViewItem

Custom NSCollectionViewItem

class LeftBarCell: NSCollectionViewItem {

var leftBarView : LeftBarView?

override func loadView() {
    leftBarView = LeftBarView(frame: NSZeroRect)
    view = leftBarView!
}

func setup(title : String){

    leftBarView?.titleTextView.string = title
}

}

在LeftBarView

In LeftBarView

class LeftBarView: NSView {

lazy var titleTextView : NSTextView = {

    let titleTextView = NSTextView()

    titleTextView.isEditable = false
    titleTextView.isSelectable = false
    titleTextView.font = NSFont(name: "Helvetica", size: 20)
    return titleTextView
}()

override init(frame frameRect: NSRect) {
    super.init(frame: frameRect)

    self.setupViews()
}

required init?(coder: NSCoder) {
    super.init(coder: coder)
}

func setupViews(){
    self.addSubview(titleTextView)

    self.wantsLayer = true
    self.layer?.backgroundColor = NSColor.lightGray.cgColor

    titleTextView <- Edges()
}

}

我尝试玩

    self.leftBar.isSelectable = true
    leftBar.allowsMultipleSelection = true

，并且多项选择有效.触发了 NSCollectionViewDelegate 中的 didSelectItemsAt

and multiple selection is working. The didSelectItemsAt from NSCollectionViewDelegate is triggered

但是当我尝试使用

    self.leftBar.isSelectable = true

或

    self.leftBar.isSelectable = true
    self.leftBar.allowsEmptySelection = true

当我单击collectionviewitem时，它不起作用，未触发 NSCollectionViewDelegate 中的 didSelectItemsAt .

It is not working when I click on the collectionviewitem, The didSelectItemsAt from NSCollectionViewDelegate is not triggered.

任何想法都将不胜感激，谢谢！

Any thoughts would be appreciated, thanks!

推荐答案

已解决.这是因为textview覆盖了单元格，您可能需要禁用textview才能使其变为被动状态.

Solved. This is because the textview covers the cell, u might need to disable the textview to become passive.

extension NSTextView {

 open override func hitTest(_ point: NSPoint) -> NSView? {
    return nil
   }
}

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