swift -> AsyncSocket 建立 UDP socket 连接

下載位置:https://github.com/robbiehanson/CocoaAsyncSocket

使用 AsyncUdpSocket.m 和 AsyncUdpSocket.h

因為專案是 Swift 專案，要使用 objecitive-c 的函式庫要在 Header 檔中 import。

1. 複製 AsyncUdpSocket.m 和 AsyncUdpSocket.h 到專案中，xcode 會問你是否建立 Bridge file，確定建立。

2. 在 你的專案名稱-Bridging-Header.h 檔中加入：

#import "AsyncUdpSocket.h"

ViewControler.swift

//
//  ViewController.swift
//  udp_test
//
//  Created by  on 16/5/9.
//  Copyright © 2016年. All rights reserved.
//

import UIKit

class ViewController: UIViewController,AsyncUdpSocketDelegate{
    var udpClient = AsyncUdpSocket();
    override func viewDidLoad() {
        super.viewDidLoad();
                // Do any additional setup after loading the view, typically from a nib.
    }
    //手动发送
    @IBAction func btn_send(sender: UIButton) {
        let data = "Hi, im wang".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true);
        udpClient.sendData(data, toHost: "192.168.1.102", port: 60002, withTimeout: -1, tag: 0);
        //开始监听接收，并如10秒内无消息回复就自动断开连接，只接收一次,//如果设置超时为-1 则没有超时限制
        udpClient.receiveWithTimeout(10, tag: 0);
        
    }
    //手动关闭连接
    @IBAction func close(sender: UIButton) {
        udpClient.close();
    }
    //手动连接
    @IBAction func btn_conn(sender: UIButton) {
        udpClient = AsyncUdpSocket(delegate: self);
    }
    //如果本地发送成功 监听
    func onUdpSocket(sock: AsyncUdpSocket!, didSendDataWithTag tag: Int) {
        print("send success");
    }
    //监听接收
    func onUdpSocket(sock: AsyncUdpSocket!, didReceiveData data: NSData!, withTag tag: Int, fromHost host: String!, port: UInt16) -> Bool {
        let str = NSString(data: data, encoding: NSUTF8StringEncoding);
        print("receive:\(str)");
        //如果不能一次接收完还有更多的
        udpClient.receiveWithTimeout(10, tag: 0);
        return true;
    }
    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
}

//

import UIKit

class ViewController: UIViewController,AsyncUdpSocketDelegate{
    var udpClient = AsyncUdpSocket();
    override func viewDidLoad() {
        super.viewDidLoad();
                // Do any additional setup after loading the view, typically from a nib.
    }
    //手动发送
    @IBAction func btn_send(sender: UIButton) {
        let data = "Hi, im wang".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true);
        udpClient.sendData(data, toHost: "192.168.1.102", port: 60002, withTimeout: -1, tag: 0);
        //开始监听接收，并如10秒内无消息回复就自动断开连接，只接收一次,//如果设置超时为-1 则没有超时限制
        udpClient.receiveWithTimeout(-1, tag: 0);
        
    }
    //手动关闭连接
    @IBAction func close(sender: UIButton) {
        udpClient.close();
    }
    //手动连接
    @IBAction func btn_conn(sender: UIButton) {
        udpClient = AsyncUdpSocket(delegate: self);
    }
    //如果本地发送成功 监听
    func onUdpSocket(sock: AsyncUdpSocket!, didSendDataWithTag tag: Int) {
        print("send success");
    }
    //监听接收
    func onUdpSocket(sock: AsyncUdpSocket!, didReceiveData data: NSData!, withTag tag: Int, fromHost host: String!, port: UInt16) -> Bool {
        let str = NSString(data: data, encoding: NSUTF8StringEncoding);
        print("receive:\(str)");
        //如果不能一次接收完还有更多的
        udpClient.receiveWithTimeout(-1, tag: 0);
        return true;
    }
    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
}