Cocoa Programming for Mac OS X, Third Edition

Chapter 15. Using Alert Panels

Occasionally, you will want to warn the user about something by means of an Alert panel. Alert panels are easy to create. Most things in Cocoa are object oriented, but showing a modal Alert panel is typically done with a C function: NSRunAlertPanel(). Here is the declaration:

int NSRunAlertPanel(NSString *title, NSString *msg,
       NSString *defaultButton, NSString *alternateButton,
       NSString *otherButton, ...);

The code

int choice = NSRunAlertPanel(@"Fido", @"Rover",
                             @"Rex", @"Spot", @"Fluffy");

would result in the Alert panel shown in Figure 15.1.

Figure 15.1. Example Alert Panel

Note that the icon on the panel will be the icon ...