如何找出特定 NSScreen 上是否有全屏应用程序运行 [英] How do find out if there is a full-screen app running on a specific NSScreen

问题描述

在 Cocoa/AppKit 中，给定来自 [NSScreen 屏幕] 的屏幕，我如何才能确定在该特定屏幕上是否有全屏应用程序正在运行?我最感兴趣的是使用 Cocoa API 进行全屏的应用程序，但如果有一个解决方案也包含其他类型的全屏应用程序，那就更好了.该解决方案需要能够通过 Mac App Store 的审批.

In Cocoa/AppKit, given a screen from [NSScreen screens], how can I find out if there's a full-screen app running on that specific screen? I'm mostly interested in apps that use the Cocoa APIs for full-screen, but if there's a solution that also encompasses other types of full-screen apps, even better. The solution needs be able to pass Mac App Store approval.

我的具体用例涉及一个菜单栏应用程序 (NSStatusItem) 并确定菜单栏是否在 [NSScreen mainScreen] 上显示，以便允许一个全局键盘快捷键，用于在状态项(如果它可见)或浮动窗口(如果没有可见状态项)上显示弹出窗口定位.

My specific use case involves a menu bar app (NSStatusItem) and figuring out whether or not a menubar is shown at all on [NSScreen mainScreen] in order to allow a global keyboard shortcut to show either a popover positioning on the status item (if it's visible) or a floating window if there's no visible status item.

NSScreens 本身似乎没有公开任何关于 windows/apps 的信息，NSRunningApplication 也没有公开这些信息.

NSScreens themselves don't seem to expose any information about windows/apps, and NSRunningApplication doesn't expose this information either.

是否有碳 API 可以找到这一点?例如，如果我有一个窗口列表，我可以遍历它们并查看是否有任何窗口框架与屏幕的框架完全匹配.另一方面，可能有些应用程序具有类似的框架但在其他应用程序下运行(例如 Backdrop 应用程序，https://itunes.apple.com/us/app/backdrop/id411461952?mt=12)，因此这样的方法需要查看窗口级别.

Are there perhaps Carbon APIs for finding this out? For example, if I have a list of windows, I could iterate through them and see if any window frames match the screens' frame exactly. On the other hand, there might be apps that have a frame like that but run underneath other apps (like the Backdrop app, https://itunes.apple.com/us/app/backdrop/id411461952?mt=12), so an approach like this would need to look at window levels.

推荐答案

可以试试CGWindowList API，比如CGWindowListCopyWindowInfo().

You can try the CGWindowList API, such as CGWindowListCopyWindowInfo().

如果您只想知道菜单栏是否显示，您应该能够检查 -[NSApplication currentSystemPresentationOptions] 的 NSApplicationPresentationAutoHideMenuBar 或 NSApplicationPresentationHideMenuBar代码>.该方法还可以告诉您活动应用程序是否处于 Cocoa 全屏模式 (NSApplicationPresentationFullScreen).

If you just want to know if the menu bar is showing, you should be able to check -[NSApplication currentSystemPresentationOptions] for NSApplicationPresentationAutoHideMenuBar or NSApplicationPresentationHideMenuBar. That method can also tell you if the active app is in Cocoa full-screen mode (NSApplicationPresentationFullScreen).

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