Cocoa 中类似MessageBox的方法

Reference：

1. http://www.gamemastercn.com/archives/127

2.http://stackoverflow.com/questions/2919826/how-do-i-implement-a-message-box-in-a-cocoa-application

使用CFUserNotificationisplayAlert:

CFOptionFlags  result;
        NSString *strMsg = [NSString stringWithFormat:@"%i", 234];
        CFStringRef* msg_ref;/*
        CFUserNotificationDisplayAlert(0,
                                       kCFUserNotificationNoDefaultButtonFlag,
                                       NULL, NULL, NULL,
                                       CFSTR("Title"),
                                       CFSTR("Message"),
                                       NULL, NULL, NULL, &result);*/

CFShow:

CFStringRef theString = CFStringCreateWithFormat (kCFAllocatorDefault,NULL,CFSTR("pi = %.2f %@\n"), 3.1415,CFSTR("."));
        CFShow(theString);

NSAlert

    NSAlert *alert = [[NSAlert alloc] init];
    //[alert addButtonWithTitle:@"OK"];
    //[alert addButtonWithTitle:@"Cancel"];
    [alert setMessageText:@"Delete the record?"];
    //[alert setInformativeText:@"Deleted records cannot be restored."];
    //[alert setAlertStyle:NSWarningAlertStyle];
    // [alert setHelpAnchor:@"ddd"];
    // [alert setInformativeText:@"asdfa"];
    // [alert setMessageText:strMsg];
    /*
     [alert beginSheetModalForWindow:_window
     modalDelegate:self
     didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)
     contextInfo:nil];
     */
    [alert runModal];