According to this document: https://developer.apple.com/documentation/usernotifications/implementing-communication-notifications Communication notifications provide a rich experience for direct communication. These notifications have a unique user experience, highlighting prominent avatars and group names. But when NSUserActiveTypes ->INSendMessage Intent is added to info. plist, the WatchOS startup app will display Outlook Handoff on Mac. However, there will be no Outlook Handoff after iOS startup. 按照此文档：https://developer.apple.com/documentation/usernotifications/implementing-communication-notifications 通讯通知为直接沟通提供了丰富的体验。这些通知具有独特的用户体验，突出了醒目的头像和群组名称。 但是当添加NSUserActivityTypes->INSendMessageIntent到info.plist后，WatchOS启动App就会在Mac 上出现Outlook接力。但是iOS启动后不会出现Outlook接力。

哈哈哈，已解决。Watch App启动后好像默认会激活info.plist->NSUserActiveTypes里的第一个，不要把INSendMessageIntent放在第一个，第一个放一个自定义的String。 Hahaha, it has been resolved. After the Watch App is launched, it seems that the first option in info. plst ->NSUserActiveTypes will be activated by default. Do not put INSEndMessage Intent in the first option, instead, place a custom String in the first option.