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:self delegateQueue: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