Swift3.0 — CocoaAsyncSocket客戶端（Socket通信）

CocoaAsyncSocket直接從GitHub下載： 
https://github.com/robbiehanson/CocoaAsyncSocket

怎么使用CocoaAsyncSocket呢？ 
我用的是最直接的方法，下載下來解壓后是下面的文件，找到這兩個文件，我們用GCDAsyncSocket（TCP），直接將這兩個文件拖進xCode8 
 
 
將這兩個文件拖進xCode后它會提示你是否建立一個Bridge-Header，就點擊Create。 
然后點擊這個頭文件並輸入

#import "GCDAsyncSocket.h"

這時候按下Command+B重新編譯一下。這樣CocoaAsyncSocket就導入完畢了。

下面是客戶端界面 

進入ViewController.swift

// // ViewController.swift // AsyncSocket_Exp // // Created by 大老虎 on 2016/11/27. // Copyright © 2016年 Tiger. All rights reserved. // import UIKit class ViewController: UIViewController, GCDAsyncSocketDelegate { @IBOutlet weak var serveripInput: UITextField! @IBOutlet weak var msgInput: UITextField! @IBOutlet weak var conBtn: UIButton! @IBOutlet weak var sendBtn: UIButton! @IBOutlet weak var msgView: UITextView! let serverPort: UInt16 = 6666 var clientSocket:GCDAsyncSocket! override func viewDidLoad() { super.viewDidLoad() sendBtn.isEnabled = false // Socket未連接成功時發送按鈕不能用 } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } // 連接服務器按鈕事件 @IBAction func conBtnClick(_ sender: AnyObject) { if serveripInput.text?.isEmpty == false { // 如果IP地址不為空則開始連接Socket clientSocket = GCDAsyncSocket() clientSocket.delegate = self clientSocket.delegateQueue = DispatchQueue.global() do { try clientSocket.connect(toHost: serveripInput.text!, onPort: serverPort) } catch { print("try connect error: \(error)") conBtn.backgroundColor = UIColor.red } } else { msgView.insertText("IP地址不能為空！\n") } } func socket(_ sock: GCDAsyncSocket, didConnectToHost host: String, port: UInt16) -> Void { print("connect success") sendBtn.isEnabled = true // 連接成功后發送按鈕設為可用 clientSocket.readData(withTimeout: -1, tag: 0) } func socketDidDisconnect(_ sock: GCDAsyncSocket, withError err: Error?) -> Void { print("connect error: \(err)") } func socket(_ sock: GCDAsyncSocket, didRead data: Data, withTag tag: Int) -> Void { // 1、獲取客戶端發來的數據，把 NSData 轉 NSString let readClientDataString: NSString? = NSString(data: data as Data, encoding: String.Encoding.utf8.rawValue) print("---Data Recv---") print(readClientDataString) // 2、主界面UI顯示數據 DispatchQueue.main.async { let showStr: NSMutableString = NSMutableString() showStr.append(self.msgView.text) showStr.append(readClientDataString! as String) showStr.append("\r\n") self.msgView.text = showStr as String } // 3、處理請求，返回數據給客戶端OK let serviceStr: NSMutableString = NSMutableString() serviceStr.append("OK") serviceStr.append("\r\n") clientSocket.write(serviceStr.data(using: String.Encoding.utf8.rawValue)!, withTimeout: -1, tag: 0) // 4、每次讀完數據后，都要調用一次監聽數據的方法 clientSocket.readData(withTimeout: -1, tag: 0) } // 發送消息按鈕事件 @IBAction func sendBtnClick(_ sender: AnyObject) { if msgInput.text?.isEmpty == false { // 如果消息不為空則發送 let serviceStr: NSMutableString = NSMutableString() serviceStr.append(self.msgInput.text!) serviceStr.append("\r\n") clientSocket.write(serviceStr.data(using: String.Encoding.utf8.rawValue)!, withTimeout: -1, tag: 0) } } } 

到這里客戶端程序就完成了，可以用iOS模擬器來跑一下。 

SocketTool截圖為 

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