GCDAsyncUdpSocket 组播监听端口接收数据

客户端开发一般是发送数据给服务端。这次反过来了，把客户端作为服务端了，监听对应端口并接收数据.

直接上代码：

.......h文件

@interface ListenServerData : NSObject {

}

- (id)initWithData;

@end
........m文件

#import "ListenServerData.h"

#import "GCDAsyncUdpSocket.h"

@interface ListenServerData () {

}

@property (strong, nonatomic) GCDAsyncUdpSocket *gcdUdpSocket;

@end

@implementation ListenServerData

- (id)initWithData;

{

if (self = [super init]) {

self.gcdUdpSocket = [[GCDAsyncUdpSocket alloc] initWithDelegate:selfdelegateQueue:dispatch_get_main_queue()];

NSError *error;

[_gcdUdpSocket bindToPort:88898 error:&error];

if (nil != error) {

NSLog(@"failed.:%@",[error description]);

}

[_gcdUdpSocket enableBroadcast:YES error:&error];

if (nil != error) {

NSLog(@"failed.:%@",[error description]);

}

//组播224.0.0.2地址，如果地址大于224的话，就要设置GCDAsyncUdpSocket的TTL （默认TTL为1）

[_gcdUdpSocket joinMulticastGroup:@"224.0.0.2" error:&error];

if (nil != error) {

NSLog(@"failed.:%@",[error description]);

}

[_gcdUdpSocket beginReceiving:&error];

if (nil != error) {

NSLog(@"failed.:%@",[error description]);

}

}

return self;

}

- (void)dealloc

{

if (_gcdUdpSocket) {

[_gcdUdpSocket close];

}

}

#pragma mark -GCDAsyncUdpsocket Delegate

- (void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data fromAddress:(NSData *)address withFilterContext:(id)filterContext

{

NSLog(@"Reciv Data len:%d",[data length]);

}

- (void)udpSocketDidClose:(GCDAsyncUdpSocket *)sock withError:(NSError *)error

{

NSLog(@"udpSocketDidClose Error:%@",[error description]);

}

@end