如何添加/刪除NSMenuItem下的子菜單項

Question

如何在運行時動態地在NSMenuItem下添加/刪除Sub MenuItem？

Answer 1

我找到了解決方案。

NSMenu *mainMenu = [[NSApplication sharedApplication] mainMenu]; 
NSMenu *appMenu = [[mainMenu itemAtIndex:5] submenu]; 

NSMenuItem *item=[[NSMenuItem alloc]initWithTitle:@"Tutorial" action:@selector(actionTutorial:) keyEquivalent:@"T"]; 

[item setTarget:self]; 
[item setTag:0]; 


[appMenu addItem:item]; 
[appMenu removeItemAtIndex:2]; // which is the index of above added item.