如何使用swift在鼠标悬停时显示滚动条？

Question

将鼠标移到滚动视图上时，将显示滚动条。

https://developer.apple.com/documentation/appkit/nsscrollview/1403460-flashscrollers https://developer.apple.com/documentation/appkit/nsresponder/1525114-mousemoved

要使其出现在视图外观中： 以下是代码

override func viewDidAppear() {
    super.viewDidAppear()
    featureScrollView.flashScrollers()
}