c++ - 更改 NSUserNotification 显示时间

Question

我有 NSUserNotification

NSUserNotification *n = [NSUserNotification new];
n.title = self.title;
n.subtitle = self.subtitle;
[NSUserNotificationCenter.defaultUserNotificationCenter deliverNotification:n];

但我无法控制它的横幅显示时间？是否可以使用一些私有 api 来控制它

    [n setValue:@(self.ignoresDoNotDisturb) forKey:@"_ignoresDoNotDisturb"];