how to send user name and password using post to server in iphone app - iphone

Question

I am making a lo-gin app i want to send the username and password to server for validation how to do this i have done in many ways but i am unable to post.
I am posting the username and password but it did not work if i direct give username and password to php it works so how to do this in iphone to send through post
NSString *post = [[NSString alloc] initWithFormat:#"UserName=%#&Password=%#",username,pass];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
NSURL *url = [NSURL URLWithString:#"http://www.celeritas-solutions.com/emrapp/connect.php?"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:#"POST"];
theRequest setValue:postLength forHTTPHeaderField:#"Content-Length"];
[theRequest setHTTPBody:postData];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if( theConnection )
{
webData = [[NSMutableData data] retain];
}
else
{
NSLog(#"Inside the else condition");
}
[nameInput resignFirstResponder];
[passInput resignFirstResponder];
nameInput.text = nil;
passInput.text = nil;

Answer 1

//Edited your code try this may help you.
NSString *post = [[NSString alloc] initWithFormat:#"UserName=%#&Password=%#",username,pass];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
NSURL *url = [NSURL URLWithString:#"http://www.celeritas-solutions.com/emrapp/connect.php?"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:#"POST"];
[theRequest setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
theRequest setValue:postLength forHTTPHeaderField:#"Content-Length"];
[theRequest setHTTPBody:postData];

Answer 2

//when the user clicks login<action>
- (IBAction)signinClicked:(id)sender {
NSInteger success = 0;
#try {
//to check if username and password feild are filled
if([[self.txtUsername text] isEqualToString:#""] || [[self.txtPassword text] isEqualToString:#""] ) {
[self alertStatus:#"Please enter Username and Password" :#"Sign in Failed!" :0];
} else {
NSString *post =[[NSString alloc] initWithFormat:#"username=%#&password=%#",[self.txtUsername text],[self.txtPassword text]];
NSLog(#"PostData: %#",post);
//post it to your url where your php file is saved for login
NSURL *url=[NSURL URLWithString:#"http://xyz.rohandevelopment.com/new.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
//[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(#"Response code: %ld", (long)[response statusCode]);
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(#"Response ==> %#", responseData);
NSError *error = nil;
NSDictionary *jsonData = [NSJSONSerialization
JSONObjectWithData:urlData
options:NSJSONReadingMutableContainers
error:&error];
success = [jsonData[#"success"] integerValue];
NSLog(#"Success: %ld",(long)success);
if(success == 1)
{
NSLog(#"Login SUCCESS");
} else {
NSString *error_msg = (NSString *) jsonData[#"error_message"];
[self alertStatus:error_msg :#"Sign in Failed!" :0];
}
} else {
//if (error) NSLog(#"Error: %#", error);
[self alertStatus:#"Please Check Your Connection" :#"Sign in Failed!" :0];
}
}
}
#catch (NSException * e) {
NSLog(#"Exception: %#", e);
[self alertStatus:#"Sign in Failed." :#"Error!" :0];
}
if (success) {
[self performSegueWithIdentifier:#"login_success" sender:self];
}
}
- (void) alertStatus:(NSString *)msg :(NSString *)title :(int) tag
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
message:msg
delegate:self
cancelButtonTitle:#"Ok"
otherButtonTitles:nil, nil];
alertView.tag = tag;
[alertView show];
}

Answer 3

Add Following Code After
[theRequest setHTTPBody:postData];
NSURLResponse *response;// = [[NSURLResponse alloc] init];
NSError *error;// = [[NSError alloc] init;
NSData *urlData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *str=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(#"Login response: is %#",str);