How to convert this get method into post? - ios

Question

Below is the code. It's using GET method for parsing and request.
- (void)getStudentsWithOptions:(NSString*)getURLString screen:(NSString *)screenString completion:(SkoolBeepCompletion)completion {
if (!completion) return;
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:getURLString]];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
if (error) {
completion(nil, error);
} else {
NSError *err = nil;
NSDictionary *dataDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&err];
//NSLog(#"dataDict : %#", dataDict);
if (!err) {
if ([screenString isEqualToString:#"My Students"]) {
[CoreDataController deleteAllObjects:#"Students"];
NSDictionary *dicEntry = [dataDict objectForKey:#"return_arr"];
for (NSDictionary *dicInsert in dicEntry) {
[CoreDataController storeStudentsObjects:dicInsert];
[CoreDataController storeChildrenObjects:dicInsert];
}
completion(dataDict, nil);
} else if ([screenString isEqualToString:#"User Settings"]) {
[CoreDataController deleteAllObjects:#"Profile"];
[CoreDataController storeProfileObjects:dataDict];
completion(dataDict, nil);
} else if ([screenString isEqualToString:#"About"]) {
[CoreDataController deleteAllObjects:#"About"];
[CoreDataController storeAboutObjects:dataDict];
completion(dataDict, nil);
} else if ([screenString isEqualToString:#"Works"]) {
[CoreDataController deleteAllObjects:#"Works"];
[CoreDataController storeWorksObjects:dataDict];
completion(dataDict, nil);
} else {
completion(dataDict, nil);
}
} else {
completion(nil, err);
}
}
}];
}
Above is line of code that I want in POST.
URLRequest must be using POST type.
I have added the code in my question.

Answer 1

Use NSMutableURLRequest for POST
NSString *Post=[NSString stringWithFormat:#"email=%#&password=%#",#"iamiosguy#gmail.com",#"lovetocode"];
NSData *PostData = [Post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
NSString *PostLengh=[NSString stringWithFormat:#"%d",[Post length]];
NSURL *Url=[NSURL URLWithString: #"Your URL"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:Url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
[request setHTTPMethod:#"POST"];
[request setValue:PostLengh forHTTPHeaderField:#"Content-Lenght"];
[request setHTTPBody:PostData];
NSData *ReturnData =[NSURLConnection sendSynchronousRequest:request returningResponse:Nil error:Nil];
NSString *Response = [[NSString alloc] initWithData:ReturnData encoding:NSUTF8StringEncoding];
NSLog(#"Response%#",Response);