POST method receive duplicated in server - ios

Question

I'm sending a POST request to server but they receive it duplicated with the same date and even time. this is my code :
-(void) getTerms{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
User *mUser = [[User alloc]init];
NSString *appFile1 = [self getUserFile];
mUser = [NSKeyedUnarchiver unarchiveObjectWithFile:appFile1];
NSString *post = [NSString stringWithFormat:#"Method=GetFAQ&CustomerID=%#",mUser.customerID];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[post length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:[ServerName serverName]]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:postData];
NSURLConnection *theConnection = [NSURLConnection connectionWithRequest:request delegate:self];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD dismiss];
if( theConnection ){
// other codes
}
});
});
}
I just wonder what is wrong with my code ? thanks in advance

Answer 1

this is how i solved the problem :
-(void) getCredit{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSString *post = [NSString stringWithFormat:#"Method=%#",mMethod];
NSMutableURLRequest *request = [ServerName postToServer:post];
dispatch_async(dispatch_get_main_queue(), ^{
NSURLResponse *requestResponse;
NSData *requestHandler = [NSURLConnection sendSynchronousRequest:request returningResponse:&requestResponse error:nil];
NSString *jsonString = [[NSString alloc] initWithBytes:[requestHandler bytes] length:[requestHandler length] encoding:NSUTF8StringEncoding];
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:0 error:nil];
NSDictionary *res1 = [res objectForKey:#"ServerResponse"];
});
});
}