ios发送http GET和POST请求

post:

   NSURL *url = [NSURL URLWithString:URLString];

   NSData* data =xxxxxxxxxxx;

    [requestsetURL:url];

    [requestsetHTTPMethod:@"POST"];

    [requestsetHTTPBody:data];

   [request setValue:@"application/json"forHTTPHeaderField:@"Accept"];

   [request setValue:@"application/json"forHTTPHeaderField:@"Content-Type"];

   [request setValue:[NSString stringWithFormat:@"%d",[data length]]forHTTPHeaderField:@"Content-Length"];

   NSURLConnection *conn =[[[NSURLConnection alloc]initWithRequest:requestdelegate:nil]autorelease];

    [connstart]; 

get:

 

   NSURL*url = [NSURL URLWithString:URLString];

   NSMutableURLRequest  *request = [[[NSMutableURLRequestalloc] init]autorelease];

    [requestsetURL:url];

    [requestsetHTTPMethod:@"GET"];

   NSURLConnection *conn =[[[NSURLConnection alloc]initWithRequest:requestdelegate:nil]autorelease];

    [connstart];