而不是使用Google API和新窗口用户需要再次登录，你应该使用 EventKit ，它非常简单，您可以同步到用户想要的日历，而不仅仅是Google cal。

Instead of using Google API and a new window where the user needs to be login again, you should use the EventKit, it's pretty easy stuff and you could sync to the Calendar where the user wants, not only Google cal.