接着上次讲的socket服务器
，这次讲客户端的实现，比较简单，还是直接撸代码

服务端

客户端

.h文件

#import <Foundation/Foundation.h>
typedef void (^STRINGBLOCK)(NSString *str);

@class GCDAsyncSocket;
@interface LWSocketClient : NSObject

//接收消息block
@property (nonatomic,copy)STRINGBLOCK receivedMessageBlock;//接收的消息回调

//设置主机ip和port
- (void)connectHost:(NSString *)host port:(uint16_t)port;
//发送消息
- (void)sendmessage:(NSString*)message;
@end

.m实现

#import "LWSocketClient.h"
#import "GCDAsyncSocket.h"

@interface LWSocketClient ()<GCDAsyncSocketDelegate>{
    BOOL _isServer;
}
@property(nonatomic,strong)GCDAsyncSocket *socket;//socket
@property (nonatomic, strong)NSThread *thread;    //心跳线程

@end

@implementation LWSocketClient
/*
-(void)becoMeServer{
    _isServer = YES;
    [self.thread start];
}
*/

#pragma mark  socket 实体
-(GCDAsyncSocket *)socket{
    return _socket = _socket?:[[GCDAsyncSocket alloc]initWithDelegate:self delegateQueue:dispatch_get_global_queue(0, 0)];
}

#pragma mark连接服务器端口和ip
- (void)connectHost:(NSString *)host port:(uint16_t)port{
    [self.socket connectToHost:host onPort:port error:nil];
}

#pragma mark 连接成功
- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port {
    NSLog(@"连接成功");
    [self.socket readDataWithTimeout:-1 tag:0];
    //开启线程发送心跳
    [self.thread start];
}

- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    NSString *dataStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"\n收到消息:%@",dataStr);
    self.receivedMessageBlock?self.receivedMessageBlock(dataStr):nil;
    [sock readDataWithTimeout:-1 tag:0];
}

#pragma mark 断开连接
-(void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err{
    NSLog(@"断开连接 %@",err);
    //再次可以重连
    if (err) {
        [self connectHost:sock.connectedHost port:sock.connectedPort];
    }
    else{//正常断开
    }
}

#pragma mark 消息发送
- (void)sendmessage:(NSString*)message{
    if(self.socket.isDisconnected){
        [self connectHost:self.socket.connectedHost port:self.socket.connectedPort];
    }
    [self.socket writeData:[message dataUsingEncoding:NSUTF8StringEncoding ] withTimeout:-1 tag:0];
}

#pragma mark  开启心跳定时发送
- (void)threadStart{
    @autoreleasepool {
        [NSTimer scheduledTimerWithTimeInterval:25 target:self selector:@selector(heartBeat) userInfo:nil repeats:YES];
        [[NSRunLoop currentRunLoop]run];
    }
}

#pragma mark 心跳信息
- (void)heartBeat{
    [self sendmessage:@"heart"];
}

#pragma mark 心跳线程
- (NSThread*)thread{
    if (!_thread) {
        _thread = [[NSThread alloc]initWithTarget:self selector:@selector(threadStart) object:nil];
    }
    return _thread;
}

@end

_调用调用_调用调用_调用调用_调用调用~

#pragma mark 懒加载socket
-(LWSocketClient *)socketClient{
    return _socketClient= _socketClient?:[[LWSocketClient alloc]init];
}

#pragma mark 连接服务器并处理服务器的消息block
- (void)connectHost:(NSString *)host port:(uint16_t)port receivedMessageBlock:(VOIDBLOCK)receivedMessage{
    [self.socketClient connectHost:host port:port];
    __weak typeof (&*self)weakSelf = self;
    self.socketClient.receivedMessageBlock = ^(NSString *message){
    };
}

#pragma mark  发送消息
- (void)sendmessage:(NSString*)message{
    [self.socketClient sendmessage: message];
}

二维码生成直接看demo吧，后加的

客户端没有写单独的demo，直接写在这个开源项目里了，因为读者可能经常采用MVC、MVP、MVVM这些设计模式，但本项目用了viper设计模式的部分功能，不知道大家能不能看懂
LWChatListVC里面右上角扫描按钮扫描可识别二维码然后自动连接你的桌面socket服务器，此时就可以聊天了
客户端demo地址👇这儿
喜欢的可以下载看看，登录密码我忘记了
可以在登录LoginPresenter里屏蔽掉密码输入

pragma mark 登录

- (void)loginAction{
    if([LWUser shareInstance].userName.length && [LWUser shareInstance].password.length){
        [self.interactor loginWithPhone:[LWUser shareInstance].userName password:[LWUser shareInstance].password success:^(NSDictionary *dict) {
            [UIApplication sharedApplication].keyWindow.rootViewController = [[LWTabbarVC alloc]init];
        } failure:^(NSError *error) {
        }];
    }
}