objective-c - How to change the NSPopover's arrow head position?

Question

I have a NSPopover on my app but i want to change the position of the arrow head.
What i have:

What i want:

As you can see in the second image the arrow head of the NSPopover is at the top. How can i do that?
my code:

[_popover showRelativeToRect:[sender bounds] ofView:sender preferredEdge:NSMaxXEdge];

Thank you!

Answer 1

不幸的是，这是不可能的NSPopover（从 10.7 开始）。您必须使用替代弹出框，例如出色的SFBPopovers.