ios - 如何从收到的消息中获取 MSMessage 摘要文本？

Question

我在 MSMessage 中传递摘要消息，但是当尝试获取另一端收到的消息时，它返回 nil。

下面是创建消息的代码。

fileprivate func composeMessage(with url: String, andEventInfo eventInfo: NSDictionary?) -> MSMessage {

    let message = MSMessage(session:MSSession())
    message.url = URL(string: url)
    message.layout = createTemplateForEvent(eventInfo: eventInfo!)
    message.summaryText = "SAMPLE MESSAGE"
    return message
}

在当前对话中发送消息

let message = composeMessage(with: url!,andEventInfo: eventInfo)
    activeConversation?.insert(message, completionHandler: { (error) in

        print(error)
    })

现在，在接收端

这里 summaryText 返回 nil。

override func didReceive(_ message: MSMessage, conversation: MSConversation) {

     print("DID RECEIVE MESSAGE: \(message.summaryText)")        
}

此外，当用户点击消息时，它也会返回 nil

override func willTransition(to presentationStyle: MSMessagesAppPresentationStyle) {
    guard let conversation = activeConversation else { fatalError("Expected an active converstation") }

    // Present the view controller appropriate for the conversation and presentation style.
    if presentationStyle == .expanded {

        if conversation.selectedMessage != nil {

            print(conversation.selectedMessage?.summaryText)

            presentViewController(for: conversation, with: presentationStyle)
        }

    }

}

任何人都知道为什么会发生这种情况或出现任何问题？

Answer 1

希望这会有所帮助

override func didReceive(_ message: MSMessage, conversation: MSConversation) {
// Called when a message arrives that was generated by another instance of this
// extension on a remote device.

// Use this method to trigger UI updates in response to the message.
guard let messageURL = message.url else { return }
guard let urlComponents = NSURLComponents(url: messageURL, resolvingAgainstBaseURL: false), let queryItems = urlComponents.queryItems else { return }

print("URL Components", urlComponents)
print("queryItems", queryItems)

for item in queryItems {
    print("Received \(item.name) with value \(item.value)")
}

}

引用和帮助来源:https://www.hackingwithswift.com/ios10

另请参阅:iOS10 iMessage : Unable to insert data into iMessage using MSConversation