objective-c - popUpButton is setEnabled:YES but doesn't allow click

Question

my popUpButton is in a window with a group of popUpButtons. If I try to click the 2nd of 4 vertically aligned buttons then the popdown menu will not appear. If I select the 3rd or 4th then the 2nd will now be selectable.

throughout my code the setEnabled on that popUpButton is :YES.

ideas on where to look in my controller?

This is a Objective C/Cocoa Question.

Answer 1

解決策は-validateMenuItemコードにありました...そのメソッドのどこかでnullの戻り値をチェックしていなかったので、論理的にfalseを返していました。