iOS实时通讯之socket

<span style="font-size:18px;color:#66FF99;">转自:http://www.2cto.com/kf/201512/455635.html</span>// OSI(开放式系统互联), 由ISO(国际化标准组织)制定  // 1. 应用层  // 2. 表示层  // 3. 会话层  // 4. 传输层  // 5. 网络层  // 6. 数据链接层  // 7. 物理层     // TCP/IP, 由美国国防部制定  // 1. 应用层, HTTP, FTP, SMTP, DNS  // 2. 传输层, TCP, UDP  // 3. 网络层, IP  // 4. 链路层, ARP, RARP     // HTTP(短连接)  // 1. 建立链接, 三次握手  // 2. 断开链接, 四次挥手     // 数据报文->数据包->数据帧->比特流(二进制)-->比特流->数据帧->数据包->数据报文     // socket, "插口", "套接字", 长连接, 存在于应用层和传输层之间, 提供一种封装, 方便进行通信

布局如下：

引进框架：

 

服务端代码：

#import "ViewController.h"// 使用CocoPods使用<>, 可以指定路径#import <cocoaasyncsocket cocoaasyncsocket.h="">#import "GNASocket.h" @interface ViewController ()<gcdasyncsocketdelegate> @property (weak, nonatomic) IBOutlet UITextField *portTF;@property (weak, nonatomic) IBOutlet UITextView *message; // 多行文本输入框@property (weak, nonatomic) IBOutlet UITextField *content; @property (nonatomic, strong) GCDAsyncSocket *clientSocket;// 为客户端生成的socket // 服务器socket@property (nonatomic, strong) GCDAsyncSocket *serverSocket; @end @implementation ViewController - (void)viewDidLoad{    [super viewDidLoad];} // 服务端监听某个端口- (IBAction)listen:(UIButton *)sender{    // 1. 创建服务器socket    self.serverSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];         // 2. 开放哪些端口    NSError *error = nil;    BOOL result = [self.serverSocket acceptOnPort:self.portTF.text.integerValue error:&error];         // 3. 判断端口号是否开放成功    if (result) {        [self addText:@"端口开放成功"];    } else {        [self addText:@"端口开放失败"];    }} // 发送- (IBAction)sendMessage:(UIButton *)sender{    NSData *data = [self.content.text dataUsingEncoding:NSUTF8StringEncoding];    [self.clientSocket writeData:data withTimeout:-1 tag:0];         GNASocket *socket = [GNASocket defaultScocket];    [socket.mySocket readDataWithTimeout:-1 tag:0];} // 接收消息- (IBAction)receiveMassage:(UIButton *)sender{    [self.clientSocket readDataWithTimeout:-1 tag:0];}  // textView填写内容- (void)addText:(NSString *)text{    self.message.text = [self.message.text stringByAppendingFormat:@"%@\n", text];} - (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];     } #pragma mark - GCDAsyncSocketDelegate// 当客户端链接服务器端的socket, 为客户端单生成一个socket- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket{    [self addText:@"链接成功"];    //IP: newSocket.connectedHost    //端口号: newSocket.connectedPort    [self addText:[NSString stringWithFormat:@"链接地址:%@", newSocket.connectedHost]];    [self addText:[NSString stringWithFormat:@"端口号:%hu", newSocket.connectedPort]];    // short: %hd    // unsigned short: %hu         // 存储新的端口号    self.clientSocket = newSocket;} - (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{    NSString *message = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    [self addText:message];}  @end</gcdasyncsocketdelegate></cocoaasyncsocket>

客户端代码：#import "SecondViewController.h"#import <cocoaasyncsocket.h>#import "GNASocket.h" @interface SecondViewController ()<gcdasyncsocketdelegate> @property (weak, nonatomic) IBOutlet UITextField *addressTF;@property (weak, nonatomic) IBOutlet UITextField *portTF;@property (weak, nonatomic) IBOutlet UITextField *message; @property (weak, nonatomic) IBOutlet UITextView *content; @property (nonatomic, strong) GCDAsyncSocket *socket; @end @implementation SecondViewController - (void)viewDidLoad{    [super viewDidLoad];     } // 和服务器进行链接- (IBAction)connect:(UIButton *)sender{    // 1. 创建socket    self.socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];         // 2. 与服务器的socket链接起来    NSError *error = nil;    BOOL result = [self.socket connectToHost:self.addressTF.text onPort:self.portTF.text.integerValue error:&error];         // 3. 判断链接是否成功    if (result) {        [self addText:@"客户端链接服务器成功"];    } else {        [self addText:@"客户端链接服务器失败"];    }} // 接收数据- (IBAction)receiveMassage:(UIButton *)sender{    [self.socket readDataWithTimeout:-1 tag:0];} // 发送消息- (IBAction)sendMassage:(UIButton *)sender{    [self.socket writeData:[self.message.text dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:0];}  // textView填写内容- (void)addText:(NSString *)text{    self.content.text = [self.content.text stringByAppendingFormat:@"%@\n", text];}  - (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];} #pragma mark - GCDAsyncSocketDelegate // 客户端链接服务器端成功, 客户端获取地址和端口号- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port{    [self addText:[NSString stringWithFormat:@"链接服务器%@", host]];         GNASocket *socket = [GNASocket defaultScocket];    socket.mySocket = self.socket;} // 客户端已经获取到内容- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{    NSString *content = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    [self addText:content];} @end</gcdasyncsocketdelegate></cocoaasyncsocket.h>

为通信传值写一个单例：//.h#import <foundation foundation.h="">#import <cocoaasyncsocket.h> @interface GNASocket : NSObject @property (nonatomic, strong) GCDAsyncSocket *mySocket; + (GNASocket *)defaultScocket; @end  //.m #import "GNASocket.h" @implementation GNASocket + (GNASocket *)defaultScocket{    static GNASocket *socket = nil;    static dispatch_once_t onceToken;    dispatch_once(&onceToken, ^{        socket = [[GNASocket alloc] init];    });    return socket;} @end</cocoaasyncsocket.h></foundation>

最终效果：