很多同学一听到Socket TCP UDP 这几个字眼感觉特别害怕,很怕在工作当中使用,因为他们太底层了.下面我把我在工作中使用Socket类库GCDAsyncSocket进行一次实战

文章中只适用于小型数据传输, 如果比较到,例如音频文件的话,请自行拼接data.

首先向工程导入GCDAsyncSocket.h/GCDAsyncSocket.m

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然后创建一个单例类Client 继承于NSObject

Client.h 文件内容如下

#import <Foundation/Foundation.h>

typedef void(^BLOCK)(idresult);

@interface RCClient : NSObject

+ (Client *)shareInstance;

- (void)sendMessage:(NSString *)strcomplete:(BLOCK)block;

@end

Client.m 文件内容如下:

#import "Client.h"

#import "GCDAsyncSocket.h"

// TCP连接

@interface Client ()

@property (nonatomic,strong)GCDAsyncSocket *socket;

@property (nonatomic,copy)BLOCK block;

@property (nonatomic,assign)NSInteger counter;

#define IP @"192.168.1.100"

#define PORT 5555

@end

@implementationClient

- (instancetype)init

{

self = [superinit];

if (self) {

[selfcreateConnection];

}

returnself;

}

+ (Client *)shareInstance {

staticClient *client =nil;

staticdispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

client = [[Clientalloc]init];

});

return client;

}

#pragma mark - 建立连接

- (void)createConnection {

self.socket = [[GCDAsyncSocketalloc]initWithDelegate:selfdelegateQueue:dispatch_get_main_queue()];

// 连接

NSError *error =nil;

[self.socketconnectToHost:IPonPort:PORTerror:&error];

if(error) {

NSLog(@"连接错误%@", error);

return;

}

[self.socketreadDataWithTimeout:-1tag:0];

}

// 发送数据

- (void)sendMessage:(NSString *)str tag:(NSInteger)tag complete:(BLOCK)block {

self.block = block;

[self.socketwriteData:[strdataUsingEncoding:NSUTF8StringEncoding]withTimeout:-1tag:0];

[self.socket readDataWithTimeout:-1 tag:0];

}

// tcp连接

- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port {

NSLog(@"连接成功");

[self.socketreadDataWithTimeout:-1tag:0];

}

- (void)disconnection {

[self.socketdisconnect];

[self.socketreadDataWithTimeout:-1tag:0];

}

// 服务器返回数据

- (void)socket:(GCDAsyncSocket*)sock didReadData:(NSData *)data withTag:(long)tag {

NSString *str = [[NSStringalloc]initWithData:dataencoding:NSUTF8StringEncoding];

NSLog(@"str = %@", result);

self.block(result);

[self.socketreadDataWithTimeout:-1tag:0];

}

- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err {

NSLog(@"已经断开连接!");

[self.socketreadDataWithTimeout:-1tag:0];

}

@end

转自:http://blog.5ibc.net/p/32842.html

iOS Socket/Tcp编程 GCDAsyncSocket的实战(带回调)