How to give an external property to UIButton-Collection of common programming errors

11 years ago

admin

1 minute

You can either create a UIButton subclass, or use Obj-C runtime associations like this

#import 

static char kMyExtendedPropKey;
objc_setAssociatedObject(myButton,
                         &kMyExtendedPropKey,
                         yourObjectToAssociate,
                         OBJC_ASSOCIATION_RETAIN);

Note that associations can be used in conjunction with categories to add new properties to existing classes! But use with caution, subclassing is the preferred way.