How to test 2 NSString to see if they're the same?

Question

So I want to test 2 NSString to see if they're the same while I'm typing so like:

NSString *theOriginalString = [NSString stringWithFormat:@"Superman"];

NSString *theTypedString = [textView string];

I want to see if theTypedString is wrong while I type it out so a warning pops out if someone typed the wrong answer.

Thank you in advance.

Answer 1

Use isEqualToString: to figure out if two strings are the same, in you case do the following:

if ([theOriginalString isEqualToString:theTypedString] == NO) {
    NSLog(@"The Strings are Different, wrong answer!");
} else {
    NSLog(@"The Strings are the Same, correct answer!");
}

EDIT

If you want to make sure what they have typed so far is right, try this:

if ([theOriginalString hasPrefix:theTypedString] == NO) {
    NSLog(@"The Strings are Different, wrong answer!");
} else {
    NSLog(@"The Strings are the Same, correct answer!");
}