XMPPFramework 整理文件传输

Question

我在我的项目中使用XMPPFramework，我正在尝试互相发送照片，但我被卡住了。

文件传输第一次运行良好，但在尝试发送另一个文件时，它失败并显示消息“传输已在进行中”。

我搜索了很多，但没有关于这个案例的描述/建议/答案。我该如何解决这个问题？

我的代码在这里：

按下按钮开始发送。

@IBAction func didPressedSendButton(_ sender: UIButton) {
    if imageView.image == nil{
        print("Select image first!")
        return
    }
    if jidField.text == nil{
        print("Set opponent jid first!")
        return
    }
    if !XMPP.shared.stream.isConnected{
        print("Stream is not connected!")
        return
    }

    sender.isEnabled = false

    let outgoingFileTransfer = XMPPOutgoingFileTransfer(dispatchQueue: .main)
    outgoingFileTransfer.activate(XMPP.shared.stream)
    outgoingFileTransfer.addDelegate(self, delegateQueue: .main)

    let opponent = XMPPJID(string: jidField.text!)!
    let recipient = XMPPJID(user: opponent.user, domain: opponent.domain, resource: "foo")

    do{
        outgoingFileTransfer.recipientJID = recipient

        outgoingFileTransfer.outgoingData = UIImagePNGRepresentation(imageView.image!)

        try outgoingFileTransfer.start()

        try outgoingFileTransfer.send(
            UIImagePNGRepresentation(imageView.image!),
            named: imageView.image?.description ,
            toRecipient: recipient,
            description: "outgoingFileTransfer Description")

    }catch{
        print("Uh-oh... Something went wrong.")
        print(error.localizedDescription)
    }

}

委托方法

func xmppOutgoingFileTransfer(_ sender: XMPPOutgoingFileTransfer!, didFailWithError error: Error!) {
    print("There was an error for sending a file. \(error.localizedDescription)")

    sendButton.isEnabled = true
}

func xmppOutgoingFileTransferDidSucceed(_ sender: XMPPOutgoingFileTransfer!) {
    print("Sending a file succeed. pray for receiving with no problem.")
    sendButton.isEnabled = true
}

func xmppIncomingFileTransfer(_ sender: XMPPIncomingFileTransfer!, didFailWithError error: Error!) {
    print("Incoming file transfer failed with error : ", error)
}

func xmppIncomingFileTransfer(_ sender: XMPPIncomingFileTransfer!, didReceiveSIOffer offer: XMPPIQ!) {

    print("Incoming File Transfer did receive SI Offer. Accepting...")

    print("Offer : ")
    print(offer.prettyXMLString())

    sender.acceptSIOffer(offer)
    //offer.name
}

func xmppIncomingFileTransfer(_ sender: XMPPIncomingFileTransfer!, didSucceedWith data: Data!, named name: String!) {

    print("I got something...")

    if let receivedString = String(data: data, encoding: .utf8){
        let alert = UIAlertController(title: "You\'ve got :", message: receivedString, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))

        present(alert, animated: true, completion: nil)

        print("OK, this is a text file.")
        print("Incoming file transfer did Succeed. Hooray!")
    }else if let receivedImage = UIImage(data: data){
        receivedImageview.image = receivedImage

        print("OK, this is an image file.")
        print("Incoming file transfer did Succeed. Hooray!")
    }else{
        print("I got something, but I can\'t convert it. what is this?")
    }

}

+++ 附加

我“成功”发送和接收第一个文件，但我无法发送第二个文件。它只是返回一条错误消息“传输已在进行中”，并且文件传输永远不会开始。

Answer 1

只需删除此代码：

    try outgoingFileTransfer.start()