保持窗口始终在最前面? [英] Keep window always on top?

问题描述

在Objective-C for Cocoa Apps中，可以使用这种方式使窗口始终位于顶部吗?

In Objective-C for Cocoa Apps it's possible to use such way to keep window always on top?

如何使用Swift实现相同的目标?

How to achieve the same with Swift?

self.view.window?.level = NSFloatingWindowLevel

导致构建错误Use of unresolved identifier 'NSFloatingWindowLevel'

推荐答案

要更改窗口级别，您不能在viewDidload中执行此操作，因为视图的window属性始终在那里为零，但是可以覆盖viewDidAppear方法或在IBAction方法:

To change the window level you can't do it inside viewDidload because view's window property will always be nil there but it can be done overriding viewDidAppear method or in a IBAction method:

快捷键1

override func viewDidAppear() {
    super.viewDidAppear()
    view.window?.level = Int(CGWindowLevelForKey(kCGFloatingWindowLevelKey))
}

快捷键2

view.window?.level = Int(CGWindowLevelForKey(.FloatingWindowLevelKey))

快捷键3

view.window?.level = Int(CGWindowLevelForKey(.floatingWindow))

快捷键4

最后，他们修复了奇数语法:

Finally they fixed the odd syntax:

view.window?.level = .floating

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