How to create NSButton with delayed NSMenu?

问题

In Cocoa i want to create an nsbutton with delayed menu. i.e., When clicked it should call the action method and when kept in pressed state for 2 seconds it should display a nsmenu.

It is similar to "Build Active Target" button present in Xcode toolbar.

Regards,

Dhanaraj.

回答1:

It's a NSPopUpButton.. Here is how I create it in my app.

NSToolbarItem* item = [[[NSToolbarItem alloc] initWithItemIdentifier:identifier] autorelease];
[item setLabel:label];
[item setPaletteLabel:label];
[item setToolTip:tooltip];

NSPopUpButton* button = [[[NSPopUpButton alloc] initWithFrame:NSMakeRect(0, 0, 200, 24) pullsDown:NO] autorelease];
NSMenu* menu = [button menu];
// insert code here, that adds NSMenuItems to the menu

[button setTarget:self];
[button setAction:@selector(menuAction:)];
[[button cell] setBezelStyle:NSTexturedRoundedBezelStyle];
[[button cell] setArrowPosition:NSPopUpArrowAtBottom];
[[button cell] setFont:[NSFont systemFontOfSize:14]];
[item setView:button];

来源：https://stackoverflow.com/questions/3309030/how-to-create-nsbutton-with-delayed-nsmenu