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Mac - How to programmatically hide NSApplicationActivationPolicyAccessory or LSUIElement?

I have a small Swift based Cocoa application that I am writing. It's a single window application, something like Spotlight / QuickSilver / Alfred. It's installed as NSApplicationActivationPolicyAccessory

( docs ) (although I've tried the same using LSUIElement

, which is equivalent). It is activated with a global hotkey.

Everything works well, except that when it is active, I cannot hide the application using NSRunningApplication.currentApplication().hide()

.

The docs for the hide method say: "The property of this value will be NO

if the application is already exited, or if the type cannot be hidden ." (highlight is mine) and I get NO

back (although I am actually using Swift, so I get false

).

I can understand why the app NSApplicationActivationPolicyProhibited

won't be able to be hidden since it never works, but it confuses me that this also applies to NSApplicationActivationPolicyAccessory

.

I tried it myWindow.orderOut(self);

, but this just hides the window without hiding my application and returning focus to the previous application.

I keep a link to a previously active app, so I can manually reactivate that app if needed, but I hope there is a cleaner way to do this.

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2 answers


Use NSApplication.sharedApplication().hide(nil)

. Typically one would use an application object (instance NSApplication

) rather than an instance NSRunningApplication

to work with the current application.



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The manual solution is to keep a link to the previously active instance NSRunningApplication

(named previouslyActiveApplication

below) and then activate it if you want to deactivate the application NSApplicationActivationPolicyAccessory

, for example:



previouslyActiveApplication!.activateWithOptions(NSApplicationActivationOptions.ActivateIgnoringOtherApps);
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