iPhone套接字程序

iPhone套接字程序：实现网络通信

swift
import UIKit
import Foundation
class SocketViewController: UIViewController {
    
    var socket: GCDAsyncSocket!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建套接字对象
        socket = GCDAsyncSocket(delegate: self, delegateQueue: DispatchQueue.main)
        
        // 连接服务器
        do {
            try socket.connect(toHost: "192.168.0.1", onPort: 8080)
        } catch {
            print("连接失败：\(error.localizedDescription)")
        }
    }
}
extension SocketViewController: GCDAsyncSocketDelegate {
    
    func socket(_ sock: GCDAsyncSocket, didConnectToHost host: String, port: UInt16) {
        print("连接成功")
        
        // 发送数据
        let message = "Hello, Server!"
        let data = message.data(using: .utf8)
        socket.write(data, withTimeout: -1, tag: 0)
        
        // 接收数据
        socket.readData(withTimeout: -1, tag: 0)
    }
    
    func socket(_ sock: GCDAsyncSocket, didWriteDataWithTag tag: Int) {
        print("数据发送成功")
    }
    
    func socket(_ sock: GCDAsyncSocket, didRead data: Data, withTag tag: Int) {
        let message = String(data: data, encoding: .utf8)
        print("接收到数据：\(message ?? "")")
    }
    
    func socketDidDisconnect(_ sock: GCDAsyncSocket, withError err: Error?) {
        print("连接断开：\(err?.localizedDescription ?? "")")
    }
}