如何在OSX上使用swift创建具有透明背景的窗口? [英] How can I create a window with transparent background with swift on osx?

问题描述

我想在我的Mac上创建一个osx/cocoa应用程序，该应用程序非常简单:在我的mac上显示文本字符串，没有背景.最终，这将是一个计时器，该计时器在其他窗口上方显示为覆盖图，而不会太麻烦.

I want to create an osx/cocoa application on my mac, which does something very simple: Display a text string on my mac, with no background. Ultimately this will be a timer which displays as an overlay on top of other windows, without being too intrusive.

我尝试在applicationDidFinishLaunching中设置window.backgroundColor = NSColor(red: 1.0, green:0.5, blue:0.5, alpha: 0.5)(请参见alpha为0.5)，但这并不能将其转变为远程透明的东西.

I tried setting window.backgroundColor = NSColor(red: 1.0, green:0.5, blue:0.5, alpha: 0.5) (see the alpha is 0.5), in applicationDidFinishLaunching but this doesn't turn it into something remotely transparent.

任何善良的灵魂都想提出一种方法来做到这一点?

Any good soul wants to suggest a way to do this?

推荐答案

NSWindow具有属性"opaque"，默认情况下为true.

NSWindow has a property 'opaque' which it is true by default.

当窗口不透明时，此属性的值为true；否则为false. 否则为假.

The value of this property is true when the window is opaque; otherwise, false.

只需将其更改为false:

Just change it to false:

override func viewWillAppear() {
    super.viewWillAppear()
    view.window?.opaque = false
    view.window?.backgroundColor = NSColor(red: 1, green: 0.5, blue: 0.5, alpha: 0.5)
}

迅速4更新: opaque已重命名为 查看全文