how to disable a button dynamically

Question

How to disable a button after entering a particular letter in a textfield?

dreamlax · Accepted Answer · 2009-08-26 11:50:57Z

2

Bind the text field's value to one of your object's properties and ensure to check the "updates continuously" box in Interface Builder. For this example, the property will be called theText. Then, bind the enabled state of the button using a key-value path of say containsLetterA, then in your object put the method

- (BOOL) containsLetterA
{
    NSRange rangeOfLetterA = [[self theText] rangeOfString:@"A"];
    return rangeOfLetterA.location != NSNotFound;
}

Then, also in your object, add the class method:

+ (NSSet *) keyPathsForValuesAffectingValueForContainsLetterA
{
    return [NSSet setWithObjects:@"theText", nil];
}

answered Aug 26, 2009 at 11:50

dreamlax

95.7k31 gold badges166 silver badges211 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

how to disable a button dynamically

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related