将LSUIElement转换为前台应用程序 [英] Transform LSUIElement to foreground application

问题描述

我有一个必须始终运行的应用程序（如果用户同意的话）。

I have an app which must run all the time (if the user agree whit this).

当用户退出该应用程序时，我会将前台应用程序转换为LSUIElement（该应用仅具有菜单栏图标，停靠图标和菜单消失）。

When the user quit the app, I transform the foreground app into a LSUIElement (the app only has a menu bar icon, the dock icon and the menu disappear).

我在菜单项中有一个选项，可以正常运行并转换LSUIElement进入前台应用程序（我使用功能 [NSApp setActivationPolicy：NSApplicationActivationPolicyRegular] 和 [NSApp activateIgnoringOtherApps：YES] ）

I have an options in the menu item which works ok and transform the LSUIElement into a foreground app (I use the functions [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular] and [NSApp activateIgnoringOtherApps:YES]).

我的问题出现在用户双击应用程序时。我在委托方法 applicationWillUnhide：（NSNotification *）notification 中再次使用 [NSApp setActivationPolicy：NSApplicationActivationPolicyRegular] 除了没有出现的菜单外，其他都可以正常工作。如果我转到另一个应用程序，然后又回来，则显示菜单。我尝试了不同的方法，但找不到合适的方法。

My problem appear when the user double click on the app. I use again the [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular] in the delegate method applicationWillUnhide:(NSNotification *)notification, and all works well except the menu which doesn't appear. If I go to another app, and then I came back the menu appear. I try different methods but I wasn't able to find a good one.

我想知道是一个委托方法，当用户双击应用程序时会调用该方法，或者在那一刻被调用的 NSApplication 中的函数是什么，因为我认为使用 setActivationPolicy： applicationWillUnhide 函数太迟了。

I want to know is a delegate method which is called when the user double clicks on the app, or what is the function from NSApplication which is called in that moment, because I think using the setActivationPolicy: in the applicationWillUnhide function is to late.

推荐答案

将普通应用程序转换为我使用的LSUIElement

To transform a normal application to a LSUIElement I use

ProcessSerialNumber psn = { 0, kCurrentProcess };
TransformProcessType(&psn, kProcessTransformToUIElementApplication);

并将其更改回前台：

ProcessSerialNumber psn = { 0, kCurrentProcess };
TransformProcessType(&psn, kProcessTransformToForegroundApplication);

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