ios - iOS中的MQTT-mqttDidDisconnect:套接字被远程对等方关闭

我尝试在ios中实现mqtt，但在发布mqttDidDisconnect时收到一个错误：“远程对等方关闭了套接字”。是服务器上的问题还是发送请求时的问题？
删除门代码

func mqttDidPing(_ mqtt: CocoaMQTT) {
    print("mqttDidPing")
}

func mqttDidReceivePong(_ mqtt: CocoaMQTT) {
    print("mqttDidReceivePong")

}

func mqtt(_ mqtt: CocoaMQTT, didPublishAck id: UInt16) {
    print("didPublishAck : \(id)")
}

func mqtt(_ mqtt: CocoaMQTT, didPublishComplete id: UInt16) {
    print("didPublishComplete: \(id)")
}

func mqtt(_ mqtt: CocoaMQTT, didSubscribeTopic topic: String) {
    print("didSubscribeTopic: \(topic)")
}

func mqtt(_ mqtt: CocoaMQTT, didUnsubscribeTopic topic: String) {
    print("didUnsubscribeTopic: \(topic)")
}

func mqttDidDisconnect(_ mqtt: CocoaMQTT, withError err: Error?) {
    print("mqttDidDisconnect: \(err?.localizedDescription ?? "")")
}

func mqtt(_ mqtt: CocoaMQTT, didConnectAck ack: CocoaMQTTConnAck) {
    print("didConnectAck: \(ack)")
}

func mqtt(_ mqtt: CocoaMQTT, didPublishMessage message: CocoaMQTTMessage, id: UInt16) {
    print("didPublishMessage: \(message) and \(id)")
}

func mqtt(_ mqtt: CocoaMQTT, didReceiveMessage message: CocoaMQTTMessage, id: UInt16) {
    print("didReceiveMessage: \(message) and \(id)")
}

func mqtt(_ mqtt: CocoaMQTT, didReceive trust: SecTrust, completionHandler: @escaping (Bool) -> Void) {
    print("didReceive trust")
}

最佳答案

你可以查看我的问题https://github.com/emqtt/CocoaMQTT/issues/252。本质上，问题是与服务器端相关的，并且使用EMQX代理连接成功（从https://github.com/emqx/emqx/releases/download/v3.0.0/emqx-centos7-v3.0.0.zip下载）