I have use UserName=raj and pwd=space but that url string not use in NSURL.
NSString *urlstr = [NSString stringWithFormat:@"http://www.test.com/data/image/sd.php?Uname=raj&password=Space"];
NSURL *Url = [NSURL URLWithString:urlstr];
If you are getting values from textfield then,Try this:
NSString *urlstr = [NSString stringWithFormat:@"http://www.test.com/data/image/sd.php?Uname=%@&password=%@",[usernameField.text stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding],[passwordField.text stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]];