UIActivity

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UIActivity represents an icon that appears in UIActivityViewController's view (the share menu in iOS 6).

Ordering

You can force a custom activity to appear before another activity by returning the other activity's type string in the method:

-[UIActivity _beforeActivity];

You must also return YES in

-[UIActivity _canAdjustOrder];

Custom image

If you return an image from the method -[UIActivity activityImage] then the alpha will be used as a mask for the metallic grill background. In order to have a custom full-colour icon, return the image from this method:

-[UIActivity _activityImage]