本文共 4744 字，大约阅读时间需要 15 分钟。
最近用wcf 服务 给ios和安卓做接口，做了几个ios的项目 用udp 组播 让ios多终端接收和刷新方法
做一个简单的小例子会把工程给大家下载的
c#代码：
ios代码：
先用c#做发送
组播IP范围为 224.0.0.0~239.255.255.255
建一个控制台应用程序
private static IPAddress GropuAddress = IPAddress.Parse( "224.0.0.2" ); //IP private static int GrupPort = 12001; //端口 static void Main( string [] args) { for ( int i = 0; i < 1000; i++) { System.Threading.Thread.Sleep(3000); //等待3秒再发 Send( "sendMessage" +i.ToString()+ "个！" ); } } public static void Send( string message) { |
//不在一个网段也可以收到
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp); IPEndPoint iep = new IPEndPoint(IPAddress.Any, 12002); IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("224.0.0.2"), 12001); server.Bind(iep);byte[] data = Encoding.ASCII.GetBytes(message);
server.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress.Parse("224.100.0.1"))); server.SetSocketOption(SocketOptionLevel.IP,SocketOptionName.MulticastTimeToLive, 50); server.SendTo(data, iep2); server.Close();}
顺便把c#接收也说一下（这个可以不用看，因为我们要做的是ios接收）
static void Main( string [] args) { StartListener(); Console.ReadLine(); } private static void StartListener() { byte [] b = new byte [10240]; try { while ( true ) { System.Threading.Thread.Sleep(500); String multiAddress = "224.0.0.2" ; //Datagrams.getMultiIPAddress("192.168.2.106"); Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 12001); s.Bind(ipep); IPAddress ip = IPAddress.Parse(multiAddress); s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ip, IPAddress.Any)); s.ReceiveTimeout = 5000; s.Receive(b); string sss = System.Text.Encoding.UTF8.GetString(b).Replace( "\0" , "" ).Trim(); Console.WriteLine(sss); s.Close(); } } catch (Exception ex) { Console.WriteLine( "receive multicast exception:" + ex.ToString()); } } |
ios接收
ios 用到的一个类库AsyncUdpSocket 这个类库就是发送和接收收 组播的 用起来很方便网上有好多例子我就简单说一下
建一个Single View Application
把AsyncUdpSocket.h 和AsyncUdpSocket.m加到工程里
窗体上放一个文本显示收到的信息
在ViewController.h里加入
#import "AsyncUdpSocket.h"@interface ViewController : UIViewController<AsyncUdpSocketDelegate> |
@property (strong, nonatomic ) IBOutlet UITextField *MyResaveTxt; //页面上的文本 @property ( nonatomic ,strong) AsyncUdpSocket *udpSocket; -( void )openUDPServer; |
在ViewController.m 里实现
#import "ViewController.h" @interface ViewController () @end @implementation ViewController @synthesize udpSocket,MyResaveTxt; - ( void )viewDidLoad { [ super viewDidLoad]; [ self openUDPServer]; // Do any additional setup after loading the view, typically from a nib. } - ( void )didReceiveMemoryWarning { [ super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } -( void ) openUDPServer { //初始化udp AsyncUdpSocket *tempSocket=[[AsyncUdpSocket alloc] initWithDelegate: self ]; self .udpSocket=tempSocket; //绑定端口 NSError *error = nil ; [ self .udpSocket bindToPort:12001 error:&error]; //发送广播设置 [ self .udpSocket enableBroadcast: YES error:&error]; //加入群里，能接收到群里其他客户端的消息 [ self .udpSocket joinMulticastGroup:@ "224.0.0.2" error:&error]; //启动接收线程 [ self .udpSocket receiveWithTimeout:-1 tag:0]; } //接收 -( BOOL ) onUdpSocket:(AsyncUdpSocket *)sock didReceiveData:( NSData *)data withTag:( long )tag fromHost:( NSString *)host port:(UInt16)port { NSString * info=[[ NSString alloc] initWithData:data encoding: NSUTF8StringEncoding ]; MyResaveTxt.text=info; [ self .udpSocket receiveWithTimeout:-1 tag:0]; //启动接收线程 return YES ; } @end |
c#代码：
ios代码：
补一下发汉字会有乱码
c#用
byte [] data =System.Text.Encoding.Default.GetBytes(message); |
ios用
NSStringEncoding strEncode = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000); NSString * info=[[ NSString alloc] initWithData:data encoding:strEncode ]; |
ios URL中文转码
方法1
NSString *url =@ "www.haha.com/这是中文" ; NSStringEncoding chineseEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000); url = [url stringByAddingPercentEscapesUsingEncoding:chineseEncoding]; NSLog (@ "%@" ,url);<br><br> |
NSMutableURLRequest *request = [[NSMutableURLRequestalloc] init];
// 设置URL
[request setURL:[NSURL URLWithString:url]];
// 设置HTTP方法
[request setHTTPMethod:@"GET"];
// 发送同步请求, 这里得returnData就是返回得数据
NSData *data = [NSURLConnectionsendSynchronousRequest:request
returningResponse:nil error:nil];
方法2
- ( NSString *)URLEncodedString { NSString *result = ( NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,(CFStringRef) self , NULL ,CFSTR( "!*'();:@&=+$,/?%#[]" ),kCFStringEncodingUTF8); [result autorelease]; return result; } |
本文转自lpxxn博客园博客，原文链接：http://www.cnblogs.com/li-peng/archive/2012/11/21/2780647.html，如需转载请自行联系原作者