鼠标悬停时如何显示文本？

Question

I was wondering if anyone knew how to make text appear when hovering over an element, in this case, an NSImage? The best example of what I'm talking about is when you hover over an application when it's in your dock and the name of it appears. Here's an image of what I'm talking about:

Text when hovering over doc

Answer 1

What you need is a NSButton which can be initialised with your NSImage . You just need to set the button toolTip property:

let button = NSButton(image: buttonImage, target: self, action: #selector(imageAction))
button.toolTip = "Image action info"