如何隐藏Dock图标

Question

我想选择隐藏Dock图标并显示NSStatusItem。我可以创建StatusItem，但是我不知道如何从Dock中删除图标。:-/

有什么想法吗？

Answer 1

我想您正在查找Info.plist中的LSUIElement

LSUIElement (字符串)。如果此注册表项设置为“1”，则启动服务将应用程序作为代理应用程序运行。代理应用程序不会出现在Dock或Force Quit窗口中。尽管它们通常作为后台应用程序运行，但如果需要，它们也可以来到前台来呈现用户界面。

查看有关打开/关闭它的简短讨论here

Answer 2

您可以使用所谓的激活策略：

Objective-C

// The application is an ordinary app that appears in the Dock and may
// have a user interface.
[NSApp setActivationPolicy: NSApplicationActivationPolicyRegular];

// The application does not appear in the Dock and does not have a menu
// bar, but it may be activated programmatically or by clicking on one
// of its windows.
[NSApp setActivationPolicy: NSApplicationActivationPolicyAccessory];

// The application does not appear in the Dock and may not create
// windows or be activated.
[NSApp setActivationPolicy: NSApplicationActivationPolicyProhibited];

Swift 4

// The application is an ordinary app that appears in the Dock and may
// have a user interface.
NSApp.setActivationPolicy(.regular)

// The application does not appear in the Dock and does not have a menu
// bar, but it may be activated programmatically or by clicking on one
// of its windows.
NSApp.setActivationPolicy(.accessory)

// The application does not appear in the Dock and may not create
// windows or be activated.
NSApp.setActivationPolicy(.prohibited)

这应该会隐藏停靠图标。

另请参阅

启发这个问题的

• 答案：How to create a helper application (LSUIElement) that also has a (removable) dock icon
• Documentation for NSRunningApplicationActivationPolicy.
• A相关问题："Start a GUI process in Mac OS X without dock icon".

Answer 3

要做到这一点，同时遵守苹果的指导方针，不修改应用程序捆绑包，并保证Mac App Store应用程序/(Lion应用程序?)不会因为修改info.plist而破坏它们的签名，您可以默认将LSUIElement设置为1，然后在应用程序启动时这样做：

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

以显示其停靠图标，或者如果用户选择不想要该图标，则跳过此操作。

只有一个副作用，应用程序的菜单直到失去并重新获得焦点时才会显示出来。

来源：Making a Checkbox Toggle The Dock Icon On and Off

就我个人而言，我不喜欢设置任何Info.plist选项，而是根据用户设置使用TransformProcessType(&psn, kProcessTransformToForegroundApplication)或TransformProcessType(&psn, kProcessTransformToUIElementApplication)。