网络技术

//创建Url

NSURL *url = [NSURL URLWithString:@"你的url地址"];

//创建请求

NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];

[request setHTTPMethod:@"POST"];

NSString *str = @"用户名参数=用户名&密码参数=密码";

NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];

[request setHTTPBody:data];

//连接服务器，现在使用的是异步请求，回调需要在NSURLConnectionDelegate中写

NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];

下面是异步请求的代理方法：- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

{

    NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;

    NSLog(@"%@",[res allHeaderFields]);

    self.receiveData = [NSMutableData data];

}

//接收到服务器传输数据的时候调用，此方法根据数据大小执行若干次

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

{

    [self.receiveData appendData:data];

}

//数据传完之后调用此方法

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

    NSString *receiveStr = [[NSString alloc]initWithData:self.receiveData encoding:NSUTF8StringEncoding];

    NSLog(@"%@",receiveStr);

}

//网络请求过程中，出现任何错误（断网，连接超时等）会进入此方法

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

{

    NSLog(@"%@",[error localizedDescription]);

}

http同步请求

-(void)myGetMethod

{

    /*get method*/

    NSURL *url = [NSURLURLWithString:@"http://app.qqq.com/client/getProductByID.json?product_id=*"];

    

    NSURLRequest *request = [[NSURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10];

    

    //第三步，连接服务器

    

    NSData *received = [NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:nil];

    

    NSString *str = [[NSStringalloc]initWithData:receivedencoding:NSUTF8StringEncoding];

    

    NSLog(@"getMethod%@",str);

}

-(void)myPostMethod

{

    /* post  method */

    NSURL *url = [NSURLURLWithString:@"http://app.qqq.com/client/loginUser.do"];

    ////    //第二步，创建请求

    NSMutableURLRequest *request = [[NSMutableURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10];

    [request setHTTPMethod:@"POST"];//设置请求方式为POST，默认为GET

  

    NSString *push_id=[NSStringstringWithFormat:@"member_phone=13839045702&member_password=sun"];//设置参数

    

    NSData *data = [push_iddataUsingEncoding:NSUTF8StringEncoding];

    

    [requestsetHTTPBody:data];

   //

    //    //第三步，连接服务器

    NSData *received = [NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:nil];

   

    NSString *str1 = [[NSStringalloc]initWithData:receivedencoding:NSUTF8StringEncoding];

    

    

    

   NSLog(@"超美满北京%@",str1);

}

//异步请求

-(void)myGetMethod

{

    //第一步，创建url

    NSURL *url = [NSURLURLWithString:@"http://app.qqq.com/client/getProductByID.json?product_id=1"];

    //第二步，创建请求

    NSURLRequest *request = [[NSURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10.0f];

    //第三步，连接服务器

   NSURLConnection *connection = [[NSURLConnectionalloc]initWithRequest:requestdelegate:self];

    [connectionstart];

}

-(void)myPostMethod

{

    //第一步，创建url

    NSURL *url = [NSURLURLWithString:@"http://app.qqq.com/client/loginUser.do"];

    //第二步，创建请求

    NSMutableURLRequest *request = [[NSMutableURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10.0f];

    [requestsetHTTPMethod:@"POST"];

    NSString *str =@"member_phone=13839045702&member_password=sun";

    NSData *data = [strdataUsingEncoding:NSUTF8StringEncoding];

    [requestsetHTTPBody:data];

    //第三步，连接服务器

   NSURLConnection *connection = [[NSURLConnectionalloc]initWithRequest:requestdelegate:self];

    [connectionstart];

}

异步请求的代理方法

//接收到服务器回应的时候调用此方法

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{

    NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;

    NSLog(@"%@",[resallHeaderFields]);

    self.receiveData = [NSMutableDatadata];

}

//接收到服务器传输数据的时候调用，此方法根据数据大小执行若干次

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{

    [self.receiveDataappendData:data];

}

//数据传完之后调用此方法

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{

    NSString *receiveStr = [[NSStringalloc]initWithData:self.receiveDataencoding:NSUTF8StringEncoding];

   NSLog(@"%@",receiveStr);

}

//网络请求过程中，出现任何错误（断网，连接超时等）会进入此方法

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{

    NSLog(@"%@",[errorlocalizedDescription]);

}

http://blog.sina.com.cn/s/blog_695919cb0102uyse.html

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