Socket服務端（二）

1、將GCDAsyncSocket框架導入項目中
2、代碼如下：

#import "ViewController.h"
#import "ServertListener.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    //1、創建服務監聽器
    ServertListener *listener = [[ServertListener alloc] init];
    //2、開始監聽
    [listener start];
    //開啓主運行循環
    [[NSRunLoop mainRunLoop]run];
}
@end

#import <Foundation/Foundation.h>
@interface ServertListener : NSObject
/**開始監聽*/
-(void)start;
@end

#import "ServertListener.h"
#import "GCDAsyncSocket.h"


@interface ServertListener()<GCDAsyncSocketDelegate>

/**
 *  服務端Socket
 */
@property (nonatomic, strong) GCDAsyncSocket *serverSocket;
/**
 *  所有的客戶端
 */
@property (nonatomic, strong) NSMutableArray *clientSockets;
@property (nonatomic, strong) NSMutableString *log;//日誌
@end

@implementation ServertListener

-(NSMutableString *)log{
    if (!_log) {
        _log = [NSMutableString string];
    }
    return _log;
}

-(NSMutableArray *)clientSockets{
    if (!_clientSockets) {
        _clientSockets = [NSMutableArray array];
    }
    return _clientSockets;

}

-(instancetype)init{
    if (self = [super init]) {
        self.serverSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_global_queue(0, 0)];
    }
    return self;
}

-(void)start{
    NSError *error = nil;
    BOOL success = [self.serverSocket acceptOnPort:5239 error:&error];
    if (success) {
        NSLog(@"5239端口開啓成功，監聽客戶端請求連接...");
    }else{
        NSLog(@"5239端口開啓失敗");
         NSLog(@"%@",error);
    }
}

#pragma mark--代理
-(void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket{
    NSLog(@"%@ IP : %@: %zd 客戶端請求連接",newSocket,newSocket.connectedHost,newSocket.connectedPort);
    //1、將客戶端socket保存下來
    [self.clientSockets addObject:newSocket];
    //2、一旦同意連接 ，監聽數據讀取，如果有數據會掉用下面的代理方法
    [newSocket readDataWithTimeout:-1 tag:0];
}


#pragma mark-私有方法－寫數據
-(void)writeDataWithSocket:(GCDAsyncSocket *)clientSocket str:(NSString *)str{
    [clientSocket writeData:[str dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:0];
}

-(void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    //1、客戶端傳遞數據轉換成字符串
    NSString *clientStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

    self.log = [NSMutableString stringWithFormat:@"%@",clientStr];
    for (GCDAsyncSocket *socket in self.clientSockets) {
        if (![sock isEqual:socket]) {
            [self writeDataWithSocket:socket str:self.log];

        }
    }
    //2、監聽數據讀取
    [sock readDataWithTimeout:-1 tag:0];
}


-(void)exitWithSocket:(GCDAsyncSocket *)clientSocket{
    [self writeDataWithSocket:clientSocket str:@"退出成功\n"];
    [self.clientSockets removeObject:clientSocket];
}

-(void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag{
    NSLog(@"數據發送成功...");
}

@end

3、端口開啓，監聽客戶端連接

4、模擬客戶端連接

5、服務端監聽到客戶端的連接

6、客戶端發送信息

7、服務端監聽到信息的發送