相信很多Windows程序员都习惯MessageBox弹框提示， 在MacOS下也有类似MessageBox这种弹框提示方法

第一种方法

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    //其他的各种弹框类型
    NSAlert *alert = [[NSAlert alloc] init];
    //[alert addButtonWithTitle:@"OK"];
    //[alert addButtonWithTitle:@"Cancel"];
    [alert setMessageText:@"test?"];
    //[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];

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    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);

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