iOS,Socker编程

//
//  ViewController.m
//  SockerLearn
//
//  Created by Vie on 2017/2/9.
//  Copyright ? 2017年 Vie. All rights reserved.
//

#import "ViewController.h"
#import "GCDAsyncSocket.h"
@interface ViewController ()<GCDAsyncSocketDelegate>
@property(nonatomic,strong) GCDAsyncSocket *socket;
@end

@implementation ViewController

-(GCDAsyncSocket *)socket{
    if (!_socket) {
        //创建一个socket对象，代理方法都会在子线程调用，在刷新UI时就要回到主线程
        _socket=[[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)];
        _socket.IPv4PreferredOverIPv6 = NO; // 设置支持IPV6

    }
    return _socket;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    float heightBtn=50;
    float widthBtn=self.view.frame.size.width*0.8;
    float btnX=(self.view.frame.size.width-widthBtn)/2;
    
    //连接服务器按钮
    UIButton *connectBtn=[[UIButton alloc] initWithFrame:CGRectMake(btnX, 100, widthBtn, heightBtn)];
    [connectBtn setTitle:@"连接服务器" forState:UIControlStateNormal];
    [connectBtn setBackgroundColor:[UIColor colorWithRed:104/255.0 green:200/255.0 blue:250/255.0 alpha:1]];
    [connectBtn.layer setCornerRadius:8.0f];
    [connectBtn addTarget:self action:@selector(connectAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:connectBtn];
    
    //登陆按钮(登陆其实就是发送消息校验)
    UIButton *loginBtn=[[UIButton alloc] initWithFrame:CGRectMake(btnX, 180, widthBtn, heightBtn)];
    [loginBtn setTitle:@"登陆验证" forState:UIControlStateNormal];
    [loginBtn setBackgroundColor:[UIColor colorWithRed:104/255.0 green:200/255.0 blue:250/255.0 alpha:1]];
    [loginBtn.layer setCornerRadius:8.0f];
    [loginBtn addTarget:self action:@selector(loginAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:loginBtn];
    
    //断开连接
    UIButton *closeBtn=[[UIButton alloc] initWithFrame:CGRectMake(btnX, 260, widthBtn, heightBtn)];
    [closeBtn setTitle:@"断开连接" forState:UIControlStateNormal];
    [closeBtn setBackgroundColor:[UIColor colorWithRed:104/255.0 green:200/255.0 blue:250/255.0 alpha:1]];
    [closeBtn.layer setCornerRadius:8.0f];
    [closeBtn addTarget:self action:@selector(closeAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:closeBtn];
    
}
//连接Socket服务
-(void)connectAction:(UIButton *)sender{
    NSLog(@"连接Socket服务器");
    NSString *host=@"192.168.191.1";
    int port=5678;
    //连接服务器
    NSError *error=nil;
    
//    [self.socket connectToHost:host onPort:port error:&error];
    //设置连接超时时间
    [self.socket connectToHost:host onPort:port withTimeout:15 error:&error];
    
    if (error) {
        NSLog(@"%@",error);
    }
}

//发送消息Socket登陆验证
-(void)loginAction:(UIButton *)sender{
    NSLog(@"发送消息Socket登陆验证");
    //登陆指令(本质是发送消息接收消息)
    NSString *loginInfo=@"Vie:123456\n";
    NSData *data=[loginInfo dataUsingEncoding:NSUTF8StringEncoding];
    //-1不设置超时
    [self.socket writeData:data withTimeout:-1 tag:0];
}

//断开Socket连接
-(void)closeAction:(UIButton *)sender{
    NSLog(@"断开Socket连接");
    [self.socket disconnect];
}

#pragma  mark  GCDAsyncSocketDelegate数据发送成功执行回调
-(void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag{
    NSLog(@"数据成功发送到服务器");
    //自己调用下读取数据的方法，接着Socket才会执行didReadData(每当你接收到数据之后，需要再次设置)
    [self.socket readDataWithTimeout:-1 tag:tag];
}

#pragma mark GCDAsyncSocketDelegate接收到数据
-(void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    //将接收到的数据转换成字符串，中文编码要一致
    NSString *responseString=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"收到数据tag:%ld  内容：%@",tag,responseString);
   //每次读完数据后,都要调用一次监听数据的方法Socket才会执行didReadData
    [self.socket readDataWithTimeout:-1 tag:tag];
}

#pragma mark GCDAsyncSocketDelegate连接服务器结果回调
-(void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port{
    NSLog(@"连接主机成功");
}

-(void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err{
    if (err) {
        NSLog(@"连接失败");
    }else{
        NSLog(@"正常断开");
    }
}

@end