Continuously checking two NSSecureTextField

Question

how can i make this to keep checking all the time the 2 NSSecureTextFields to know if they are equal/different to display the images without the need of a button?

the .h file:

IBOutlet NSSecureTextField *textField;
IBOutlet NSSecureTextField *textField2;
IBOutlet NSImageView *imagem;
}

- (IBAction)verificarPass:(id)sender; 

the .m file:

- (IBAction)verificarPass:(id)sender;
{
    NSString *senha1 = [textField stringValue];
    NSString *senha2 = [textField2 stringValue];
    NSImage *certo;
    NSImage *errado;
    certo = [NSImage imageNamed:@"Status_Accepted.png"];
    errado = [NSImage imageNamed:@"Error.png"];

    if ([senha1 isEqualToString:senha2]) {
[imagem setImage:certo];
}else{
    [imagem setImage:errado];
}
}

Answer 1

Add a target method to the textField controls, triggered by the UIControlEventEditingChanged control event:

[textField addTarget:self action:@selector(verificarPass:) forControlEvents:UIControlEventEditingChanged];