ios - WCSession:是否可以取消排队的消息？

Question

有没有办法取消WCSession的sendMessage(_:replyHandler:errorHandler:)方法发送的消息？

来自documentation :

Messages are queued serially and delivered in the order in which you sent them.

Answer 1

没有。这种类型的转移是不可取消的，因为

• 操作系统会立即将任何sendMessage 数据发送到可达 对应方

  Use the [sendMessage] method to transfer data to a reachable counterpart. These methods are intended for immediate communication between your iOS app and WatchKit extension.

  Data sent using the [sendMessage], and transferCurrentComplicationUserInfo: methods has a higher priority and is transmitted right away.

• 操作系统没有提供专门取消消息的机制

  唯一具有取消方法的WCSession对象是WCSessionUserInfoTransfer和WCSessionFileTransfer，因为低优先级transferUserInfo 或 transferFile 数据不会立即发送，而是在操作系统确定的最佳时间发送。