Getting the Value of a UITextField as keystrokes are entered?

Question

Let\'s say I have the following code:

IBOutlet UITextField* nameTextField;
IBOutlet UILabel* greetingLabel;

I\'d like the greetingLab

Answer 1

you could register an action for the event UIControlEventEditingChanges on the text field:

[nameTextField addTarget:self action:@selector(updateLabelUsingContentsOfTextField:) forControlEvents:UIControlEventEditingChanged];

...

// TODO: error checking

- (void)updateLabelUsingContentsOfTextField:(id)sender {

    greetingLabel.text = [NSString stringWithFormat:@"Hello %@", ((UITextField *)sender).text];

}