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iOS

Posted by ivan hernandez
ivan hernandez
Courses Plus Student 2,298 Points

Problem with USERS at PARSE (Luis <> luis)

I hope someone can help me with this NEW users in PARSE, I have a sign up and the problem is that for PARSE if I sign up like "Luis" is different from "luis" and it make 2 different users. how can I fix this??

Ben Jakuben any ideas??

2 Answers

Derek Medlin
Derek Medlin
6,151 Points
Derek Medlin
Derek Medlin
6,151 Points

You could just store the string as lowercase

NSString *username = textField.text.lowercaseString; // or wherever you're storing the user from.

And then when you retrieve the username just use the capitalizedString property. Just note that no matter what the user stores the username as, it will always come out starting with a capital letter followed by lowercase

username.capitalizedString; // 'derek' would now be 'Derek'

To do more of what i think you want to do, you could do this..

NSString *username = @"DEREK";

NSArray *listOfUsers = @[@"dErEk",
                      @"mEDLIN"];

// even though the strings have crazy capitalization, it will still show that the user exists 

BOOL userExists = NO;
for (NSString *user in listOfUsers) {
    if ([user compare:username options:NSCaseInsensitiveSearch] == NSOrderedSame) { // This basically looks at all the characters in the string as the same capitalization or ignores it
        userExists = YES;
        break;
    }
}

if (!userExists) {
    // TODO: Add code to add user to parse
    NSLog(@"user does NOT exist!");
}
else {
    // TODO: Alert the user that the username has already been taken
    NSLog(@"user exists!");
}

On a side note, if you just wanted to compare two strings you could use

NSString *aString = @"teXt";
NSString *anotherString = @"TeXT";

if ([aString.lowercaseString isEqualToString:anotherString.lowercaseString]) {
    // This condition will be true because it returns the strings as lowercase before comparing
}
Ben Jakuben
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

Great answer! Thanks for sharing!

ivan hernandez
PLUS
ivan hernandez
Courses Plus Student 2,298 Points
ivan hernandez
ivan hernandez
Courses Plus Student 2,298 Points

thank you for your answer, I will try this ...