Requirements

MobileCoreServices.framework

Components

APSHTTPRequest - Responsible for the http request
NSObject<APSHTTPRequestDelegate> - Responsible for the APSHTTPRequest callbacks
APSHTTPPostForm - Used to build a post form
APSHTTPResponse - Holds all the response information from the request
APSHTTPHelper - Helper class with some handy functions

GET Request:

// in header
#import <APSHTTPClient/APSHTTPClient.h>

-(void)sendRequest
{
  APSHTTPRequest *request = [[[APSHTTPRequest alloc] init] autorelease];
  [request setDelegate:self];
  [request setMethod: @"GET"];
  [request setUrl:[NSURL URLWithString: @"http://google.com/"]];
  [request send];
}

- (void)request:(APSHTTPRequest *)request onLoad:(APSHTTPResponse *)response
{
  NSString* responseString = [response responseString];
}

- (void)request:(APSHTTPRequest *)request onError:(APSHTTPResponse *)response
{
  NSString* errorMessage = [[response error] localizedDescription];
}

POST Request:

// in header
#import <APSHTTPClient/APSHTTPClient.h>

-(void)sendRequest
{
  APSHTTPPostForm *form = [[[APSHTTPPostForm alloc] init] autorelease];
  [form addFormKey:@"first_name" andValue: @"John"];
  [form addFormKey:@"last_name" andValue: @"Smith"];
  [form addFormData: UIImageJPEGRepresentation([[self myImageView] image], 0.7)
           fileName:@"image.jpeg"
	  fieldName:@"photo"];

  APSHTTPRequest *request = [[[APSHTTPRequest alloc] init] autorelease];
  [request setDelegate:self];
  [request setMethod: @"POST"];
  [request setPostForm:form];
  [request setUrl:[NSURL URLWithString: @"http://some_server.com/api/post"]];
  [request send];
}

- (void)request:(APSHTTPRequest *)request onLoad:(APSHTTPResponse *)response
{
  NSString* response = [response responseString];
}

- (void)request:(APSHTTPRequest *)request onError:(APSHTTPResponse *)response
{
  NSString* errorMessage = [[response error] localizedDescription];
}