NSURLRequest: How to change httpMethod "GET" to "POST" - iphone

Question

GET Method, it works fine.
url: http://myurl.com/test.html?query=id=123&name=kkk
I do not have concepts of POST method. Please help me.
How can I chagne GET method to POST method?
url: http://testurl.com/test.html
[urlRequest setHTTPMethod:#"POST"];

Answer 1

try this
NSString *post = [NSString stringWithFormat:#"username=%#&password=%#",username.text,password.text];
NSLog(#"%#",post);
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d",[postData length]];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#" server link here"]]];
[request setHTTPMethod:#"POST"];
NSString *json = #"{}";
NSMutableData *body = [[NSMutableData alloc] init];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Current-Type"];
[request setHTTPBody:postData];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(#"Response Code: %d", [urlResponse statusCode]);
if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300)
{
NSLog(#"Response: %#", result);
}

Answer 2

// create mutable request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
// set GET or POST method
[request setHTTPMethod:#"POST"];
// adding keys with values
NSString *post = #"query=id=123&name=kkk";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d",[postData length]];
[request addValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:postData];