求教： APP， IOS Swift 写的 UDP 广播模式（作为 Server）udpSocket 接收不到数据问题，请大家帮忙看下哪里的问题

import SystemConfiguration.CaptiveNetwork import NetworkExtension

import UIKit

class UDPSocketManager: NSObject, GCDAsyncUdpSocketDelegate {

static var shared = UDPSocketManager() var udpSocket: GCDAsyncUdpSocket? var udpError: String? var port = 26600 var isStarting: Bool = false override init() { super.init() } func start() { if isStarting { return } self.udpSocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main) do { try udpSocket?.bind(toPort: UInt16(port), interface: udpError) try udpSocket?.enableBroadcast(true) try udpSocket?.beginReceiving() self.isStarting = true } catch { print("catch:\(String(describing: error))") self.isStarting = false } } func close() { self.isStarting = false udpSocket?.close() } func sendUdp(aaa: String, ssid: String, pw: String, address: Data) { let str = "ssid:\(ssid)pw:\(pw)" let asciiArr = str.asciiHexValues let instructStr = BasicProtocol.gatewayInstructionGeneration(frameNumStrArr: BasicProtocol.gatewayFrameNumStrArr, respFlagStrArr: ["80"], cmdIdStrArr: ["08", "01"], dataStrArr: asciiArr) HUD.showSuccess("收到数据:\(aaa)\n 发送数据：\(instructStr)", delay: 5) // self.udpSocket.send(Data(instructStr.components(separatedBy: " ").joined().changeToBytes()), toHost: "192.168.4.1", port: UInt16(self.port), withTimeout: -1, tag: 0) self.udpSocket?.send(Data(instructStr.components(separatedBy: " ").joined().changeToBytes()), toAddress: address, withTimeout: -1, tag: 0) } func sendUdp(str: String, address: Data) { let asciiArr = str.asciiValues let instructStr = BasicProtocol.gatewayInstructionGeneration(frameNumStrArr: BasicProtocol.gatewayFrameNumStrArr, respFlagStrArr: ["80"], cmdIdStrArr: ["08", "01"], dataStrArr: asciiArr) HUD.showSuccess("发送数据：\(instructStr)", delay: 5) self.udpSocket?.send(Data(instructStr.components(separatedBy: " ").joined().changeToBytes()), toAddress: address, withTimeout: -1, tag: 0) } func udpSocket(_ sock: GCDAsyncUdpSocket, didReceive data: Data, fromAddress address: Data, withFilterContext filterContext: Any?) { // 接受数据 let strData = data.map({ String(format: "%02x", $0) }).joined(separator: " ") HUD.showSuccess("收到数据：\(strData)", delay: 5) NotificationCenter.default.post(name: NSNotification.Name("UDPSocketNewMessage"), object: ["strData": strData, "address": address]) } func udpSocket(_ sock: GCDAsyncUdpSocket, didSendDataWithTag tag: Int) { // 发送数据成功 } 

}