cocoa - 如何创建一个像 Twitter 一样漂浮在所有其他窗口上方的 float 窗口？

Question

当您单击上下文菜单“Tweet”时，Twitter 应用程序有一个 float 窗口，它是 NSPanel 吗？怎么做？

Answer 1

看一下 NSWindow 的 setLevel: 方法:

Each level in the list groups windows within it in front of those in all preceding groups. Floating windows, for example, appear in front of all normal-level windows. When a window enters a new level, it’s ordered in front of all its peers in that level.

-- 来自 NSWindow 的 setLevel:引用。

您还可以找到Matt Gemmell's MAAttachedWindow项目有帮助: