How can I implement login with email address or username using Parse.com?

Question

Until now we have checked the login credentials with UserName and password using following syntax.

logInWithUsernameInBackground

 [PFUser logInWithUsernameInBackground:[UsernameField.text lowercaseString] password:PasswordField.text block:^(PFUser* user, NSError* error){

But now my requirement is that:

User must need to login with any one of both email and UserName.

And we need to check with username / email and password

How can this be achieved?

Answer 1

PFQuery *query = [PFUser query];
    [query whereKey:@"email" equalTo:UsernameField.text];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error){
        if (objects.count > 0) {

            PFObject *object = [objects objectAtIndex:0];
            NSString *username = [object objectForKey:@"username"];
            [PFUser logInWithUsernameInBackground:username password:PasswordField.text block:^(PFUser* user, NSError* error){
            }];
        }else{
            [PFUser logInWithUsernameInBackground: UsernameField.text password:PasswordField.text block:^(PFUser* user, NSError* error){
            }];

        }


    }];