Connect iphone app to mysql data base - iphone

Question

I have app i want to connect to iphone app i have done code and also php code problem is that i am always getting Incorrect password alert view . I aam entering correct user name and password but again it displays error alert view
NSString *post =[NSString stringWithFormat:#"UserName=%#&UserPassword=%#",userNameTextField.text, userPasswordTextFiled.text];
NSString *hostStr = #"http://www.myurl.com/emrapp/connect.php?";
hostStr = [hostStr stringByAppendingString:post];
NSData *dataURL = [NSData dataWithContentsOfURL: [ NSURL URLWithString: hostStr ]];
NSString *serverOutput = [[NSString alloc] initWithData:dataURL encoding: NSASCIIStringEncoding];
if([serverOutput isEqualToString:#"Yes"]){
UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:#"Congrats" message:#"You are authorized "
delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
[alertsuccess show];
[alertsuccess release];
} else {
UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Username or Password Incorrect"
delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
[alertsuccess show];
[alertsuccess release];
}
And my server side code is
<?php
$con = mysql_connect("emriphone.db.6420177.hostedresource.com","emriphone","Light12-");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("emriphone", $con);
$u=$_GET['UserName'];
$pw=$_GET['UserPassword'];
$query = sprintf("SELECT UserName,UserPassword from appUsers WHERE UserName='%s' AND UserPassword='%s'", mysql_real_escape_string($u),mysql_real_escape_string($pw));
$login=mysql_query($query,$con) or die(mysql_error());
if(mysql_num_rows($login)==1){
$row =mysql_fetch_assoc($login);
echo 'YES'; exit;
}
else{
echo'NO';exit;
}
mysql_connect($con);
?>

Answer 1

Try Using Following Code
NSString *data = [[NSString stringWithFormat:#"UserName=%#&UserPassword=%#",userNameTextField.text, userPasswordTextFiled.text];
NSData *postData = [data dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
// preaparing URL request to send data.
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
NSString *url = [NSString stringWithFormat:#"http://www.myurl.com/emrapp/connect.php?"];
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:postData];
[request setTimeoutInterval:7.0];
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);