Question

I am trying to use validatevalue:forkey: method to validate a coredata property.

I have a textfield that I am getting a string from I then want to check that string against my validation.

I am assuming that it is attempting to validate against the Reg. Exp. I have in my model.

However, no matter what I input it will always pass the validation.

EDIT:

The regular expression is a standard regular expression for validating email.

I can post some “official” code tomorrow, but its basically like the following:

NSString *string = textfield.text;

if(![myEntity validateValue:&string forKey:@"email"])
{
    // provide necessary user feed back i.e. let user know email is not in valid format}
}

Answer 1

Not sure validatevalue:forKey: is what you want. This is what the validation should look like:

- (BOOL)validateEmail:(id *)value error:(NSError **)error {
    if (self.email && ![self.email isValidEmailAddress]) {
        if( error )        
             *error = [NSError errorWithDomain:@"MyErrorDomain" code:1];
        return NO;
    }

    return YES;
}

Note that isValidEmailAddress doesn’t actually exist. 🙂