NSTableView - 初始选择灰色直到点击(聚焦) [英] NSTableView - Initial Selection Grey until Clicked (Focussed)

问题描述

我在这里有一个简单的应用示例，我把它拼凑在一起，我得到的几乎就是我想要的.

I've got a simple example of an app here which I slapped together, and what I'm getting is pretty much what I'm after.

问题是当视图加载时，在 NSViewController 的 viewDidLoad 中，我将 tableView 的选定索引设置为 0，即第一项(有效).

The issue is that when the view loads up, in the NSViewController's viewDidLoad, I set the tableView's selected index to 0 i.e. the first item (which works).

我注意到的是，当发生这种情况时，所选行的颜色显示为灰色(即好像它不是活动窗口/视图)……当我物理单击时，它似乎只以正常的蓝色突出显示在选定的行上.

What I do notice is that when this happens, the selected row comes up as grey in color (i.e. as if it's not an active window/view)… It only seems to high light in the normal blue color when I physically click on the row that's selected.

我可以确认该行被选中并且一切正常.

I can confirm that the row is selected and everything appears fine.

有什么想法吗?

确认一下，我用来选择行的代码是:

To confirm, the code I use to select the row is:

override func viewDidAppear() {
    self.tableView.selectRowIndexes(NSIndexSet(index: 0), byExtendingSelection: false)
}

以下是实际视图本身发生的情况:

Here is what's happening with the actual view itself:

上图:较深的灰线是选择栏".这就是视图激活后立即发生的情况.

ABOVE: The darker grey line is the "selection bar". This is what happens as soon as the view becomes active.

上图:一旦我点击那一行(曾经是深灰色的那一行)，我就会得到他想要的高光......即海军蓝.

ABOVE: Once I click on that row (the one which was once dark grey), I get he desired high lighting.. i.e. Navy Blue.

推荐答案

cell 是灰色的原因是因为 table view 没有焦点/不是第一响应者.

The reason why the cell is grey is because the table view doesn't have focus / isn't the first responder.

tableView 单元格选择颜色有 3 种状态

There are 3 states for tableView cell selection color

1) 无选择 = 清除行背景

1) no selection = clear row background

2) 选择和焦点 = 蓝色行背景

2) selection and focus = blue row background

3) 选择且无焦点 = 灰色行背景

3) selection and no focus = grey row background

这可能是因为另一个视图具有焦点.简单地选择一个单元格不会将焦点转移到 tableView.你需要调用 NSWindow.makeFirstResponder() 来改变焦点.

This is probably because another view has focus. Simply selecting a cell doesn't shift focus to a tableView. You need to call NSWindow.makeFirstResponder() to change the focus.

func tableViewSelectionDidChange(notification: NSNotification) {
    let tableView = notification.object as! NSTableView
    if tableView.selectedRow != -1 {
        self.window!.makeFirstResponder(self.tableView)
    }
}

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