IOS how to POST GET DELETE PUT Rest Api

I am building my App conected to a Rest API and until now I only made a GET request with the following code :

//Start login process
NSString *emailstring = email.text;
NSString *passstring = pass.text;

// Create the URL from a string.
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.myserver.com/Rest/API/users?format=json&email=%@&password=%@",emailstring,passstring]];
NSLog(@"%@",url);

// Create a request object using the URL.
NSURLRequest *request = [NSURLRequest requestWithURL:url];

// Prepare for the response back from the server    
NSHTTPURLResponse *response = nil;
NSError *error = nil;

// Send a synchronous request to the server (i.e. sit and wait for the response)
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(@"Reponse from web:%@", response);

// Check if an error occurred    
if (error != nil) {
    NSLog(@"%@", [error localizedDescription]);
    // Do something to handle/advise user.
    
    UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Login error"
                                                      message:@""
                                                     delegate:nil
                                            cancelButtonTitle:@"OK"
                                            otherButtonTitles:nil];
    [message show];

}

else {
    
    // Convert the response data to a string.
    NSString *responseString = [[NSString alloc] initWithData:responseData  encoding:NSUTF8StringEncoding];
    
    // View the data returned - should be ready for parsing.
    NSLog(@"%@", responseString);
    
    // Add data to a Plist file for next time
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"login.plist"];
    
    NSArray *values = [[NSArray alloc] initWithObjects:emailstring,passstring,@"IDtest",nil];
    [values writeToFile:path atomically:YES];
    [values release];
    

    [self dismissModalViewControllerAnimated:YES];
}

This code work fine just for a GET request. I saw it is there a lot of framework (e.g RestKit, ....). But I am getting a bit lost with other request! So what is the best solution to make POST DELETE PUT request for an IOS App?

It's similar code, but using the class NSMutableRequest. You can set the httpbody and other parameters to communicate with the server.

check the documentation: https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableURLRequest_Class/Reference/Reference.html

to post something, just put setHTTPMethod:@"POST"and assign the data to post using setHTTPBody: