NSWorkspace的“frontmostApplication”在初始使用后不会更改 [英] NSWorkspace's 'frontmostApplication' doesn't change after initial use

问题描述

我尝试获取当前活动（前台）应用程序的更新。甚至跨计算机屏幕。我使用这个代码尝试做：

I'm trying to get an update of the current active (foreground) application. Even across computer screens. I'm using this code to try to do it:

print(NSWorkspace.sharedWorkspace().frontmostApplication?.localizedName)

每3秒在命令行应用程序中循环，并打印到控制台。

This loops in a command line application every 3 seconds, and prints to console. It works with any application open as active when it first starts up.

但是，它不会从第一个应用程序后改变。
1.为什么要这样做？
2.什么是正确的代码，使其工作？
3.每次最前面的应用程序更改时，是否有一种方法来简单地获取应用程序名称？ （最好在swift或obj-c中）

However, it does not change from the first app afterwards. 1. Why is it doing this? 2. What is the proper code to make it work? 3. Is there a way to simply get the app name every time the forefront application changes? (preferably in swift or obj-c)

推荐答案

名称每次最前沿的应用程序更改？

Is there a way to simply get the app name every time the forefront application changes?

使用 NSWorkspace 通知 NSWorkspaceDidActivateApplicationNotification 。

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