Using NSApplicationActivationPolicyAccessory does not hide the icon in dock

I have an application which will launches another application as a child process.

The child application does not need the dock icon, we use [NSApp setActivationPolicy: NSApplicationActivationPolicyAccessory]; to achieve it.

However, I have discovered that the dock icon cannot be perfectly hidden.

  1. The number of recently used apps that aren’t already in dock(not choose keep in dock) less than three: The icon of the child application remains in the dock without being hidden.

  2. The number of recently used apps that aren’t already in dock(not choose keep in dock) more than three： The icon of the child application appears a few milliseconds.

Even though add LSUIElement key in the Info.plist can work, we are seeking a programmatic modification.

Up vote post of ms-xu Down vote post of ms-xu
661 views
Posted by
ms-xu
Reply
Add a Comment

Replies

Even though add LSUIElement key in the Info.plist can work

That’s definitely the option I recommend (or LSBackgroundOnly, depending on whether you show any UI or not).

we are seeking a programmatic modification.

Why?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Posted by
eskimo
Up vote reply of eskimo Down vote reply of eskimo

  • Due to some complex reasons, using info.plist would require us to modify a lot of logic.

    Therefore, we expect NSApplicationActivationPolicyAccessory to work as described in the documentation "This corresponds to value of the LSUIElement key in the application’s Info.plist being 1.", rather than displaying the icon in some scenarios.

    —
    ms-xu
Add a Comment

At what point in the app's lifecycle are you calling -setActivationPolicy:?

Posted by
.jsn
Up vote reply of .jsn Down vote reply of .jsn
Add a Comment

After create the app instance.

A sample demo code:

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSApplication *app = [NSApplication sharedApplication];
        BOOL returnValue = [NSApp setActivationPolicy: NSApplicationActivationPolicyAccessory];
    }
    return  NSApplicationMain(argc, argv);
}
Posted by
ms-xu
Up vote reply of ms-xu Down vote reply of ms-xu
Add a Comment