原文网址：http://blog.csdn.net/manyxh/article/details/48196209
2015-09-03 by 木易哥哥
开发一个类似QQ、微信的即时IM聊天功能，做到实时监控消息，需要用的技术是websocket，WebSocket protocol 是HTML5一种新的协议。它实现了浏览器与服务器全双工通信(full-duplex)。在 WebSocket API，浏览器和服务器只需要要做一个握手的动作，然后，浏览器和服务器之间就形成了一条快速通道。两者之间就直接可以数据互相传送。
下面是iOS端我实现websocket通讯，列出步骤思路，以作学习。
1.加入frameworks的 libicucore.dylib
2.导入对象SRWebSocket
3.在聊天的viewController.h引用 #import "SRWebSocket.h"头文件 SRWebSocketDelegate代理，声明SRWebSocket *_webSocket;
4.在聊天的viewController.m使用
- (void)connectSocket
{
if (_webSocket ==nil) {
_webSocket = [[SRWebSocketalloc]initWithURLRequest:[NSURLRequestrequestWithURL:[NSURLURLWithString:Web_Socket]]];
_webSocket.delegate =self;
[_webSocket open];
}
}
#pragma mark - SRWebSocketDelegate 写上具体聊天逻辑
- (void)webSocketDidOpen:(SRWebSocket *)webSocket;
{
// NSLog(@"Websocket Connected");
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
[dictionary setValue:@"subscribe" forKey:@"cmd"];
[dictionary setValue:@(VER) forKey:@"ver"];
[dictionary setValue:[settingInfo getSessionId] forKey:@"sid"];
[dictionary setValue:@"1" forKey:@"channel"];
[dictionary setValue:[[settingInfo getUserAccountInfo]objectForKey:@"user_id"] forKey:@"client_id"];
//NSLog(@"dictionary:%@",[dictionary JSONString]);
[_webSocket send:[dictionary JSONString]];
}
......
- (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *)error
- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message//监控消息
- (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean
- (void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *)pongPayload
最后调试，成功，附上一张效果！
