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iOS Build a Self-Destructing Message iPhone App Using Parse.com as a Backend and Adding Users Signing Up New Users: Part 2 (PFUser)

Posted by Steve Hunter
Steve Hunter
57,684 Points

Difficulties assigning TextField values to variables.

Here's the question in the code challenge and my proposed solution which doesn't work. I'm not sure what glaringly obvious mistake I've made!

Any thoughts?

In our view controller below we want to sign up new users for our app. In the signup method, start by capturing the username and password from two UITextField properties: 'usernameField' and 'passwordField'. Store the values in the properties 'username' and 'password'.

- (IBAction)signup:(id)sender {
    NSString *username = [self.usernameField.text];
    NSString *password = [self.passwordField.text];

}
Steve Hunter
Steve Hunter
57,684 Points

I took the square brackets out ... same result.

4 Answers

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

I think the question is badly frased, but anyway - here is the solution:

self.username = [self.usernameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
self.password = [self.passwordField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

First of all, writing it like this:

[self.usernameField.text];

is wrong. Don't do that :)

Here are two ways you can write it as

self.usernameField.text; //like this
[self.usernameField text]; //or this

Now, as for your problems: If your having problems with assigning values, I'd start by checking that your IBOutlets are properly connected. If that doesn't help, let me know :)

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

Ah sorry, I didn't see it was a code challenge you had problems with. I'll have a look and have an answer for you shortly :)

Steve Hunter
Steve Hunter
57,684 Points
Steve Hunter
Steve Hunter
57,684 Points

Brilliant - thank you! :-)