CAsysncSocket 之--udp工具--AsyncUdpSocket 用法

============================================================

博文原创，转载请声明出处

蓝岩--移动互联网老兵

============================================================

详解iPhone 下AsyncSocket网络库编程是本文要介绍的内容，iphone的标准推荐CFNetwork C库编程.但是编程比较烦躁。在其它OS往往用类来封装的对Socket函数的处理。比如MFC的CAsysncSocket.在iphone也有类似于开源项目.cocoa AsyncSocket库

官方网站:http://code.google.com/p/cocoaasyncsocket/

这里只上例子，自己在项目中使用的，绝对能使用，如果有疑问，欢迎留言讨论。

将AsyncUdpSocket.h AsyncUdpSocket.m 导入到你的工程中，

在自己建立的util中，加入一下代码

#pragma mark udp
-(void)sendSearchBroadcast{
    NSString* [email protected]"255.255.255.255"; //这里发送广播
    [self sendToUDPServer:@"hello udp" address:bchost port:BCPORT];
}
-(void)sendToUDPServer:(NSString*) msg address:(NSString*)address port:(int)port{
    AsyncUdpSocket *udpSocket=[[[AsyncUdpSocket alloc]initWithDelegate:self]autorelease]; //得到udp util
    NSLog(@"address:%@,port:%d,msg:%@",address,port,msg);
    //receiveWithTimeout is necessary or you won't receive anything
    [udpSocket receiveWithTimeout:10 tag:2]; //设置超时10秒
    [udpSocket enableBroadcast:YES error:nil]; //如果你发送广播，这里必须先enableBroadcast
    NSData *data=[msg dataUsingEncoding:NSUTF8StringEncoding];
    [udpSocket sendData:data toHost:address port:port withTimeout:10 tag:1]; //发送udp
}

//下面是发送的相关回调函数
-(BOOL)onUdpSocket:(AsyncUdpSocket *)sock didReceiveData:(NSData *)data withTag:(long)tag fromHost:(NSString *)host port:(UInt16)port{
    NSString* rData= [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]
                     autorelease];
    NSLog(@"onUdpSocket:didReceiveData:---%@",rData);  
    return YES;
}
-(void)onUdpSocket:(AsyncUdpSocket *)sock didNotSendDataWithTag:(long)tag dueToError:(NSError *)error{
    NSLog(@"didNotSendDataWithTag----");
    
}
-(void)onUdpSocket:(AsyncUdpSocket *)sock didNotReceiveDataWithTag:(long)tag dueToError:(NSError *)error{
    NSLog(@"didNotReceiveDataWithTag----");
}
-(void)onUdpSocket:(AsyncUdpSocket *)sock didSendDataWithTag:(long)tag{
    NSLog(@"didSendDataWithTag----");
}
-(void)onUdpSocketDidClose:(AsyncUdpSocket *)sock{
    NSLog(@"onUdpSocketDidClose----");
}

ok,试一下吧