How to Get the Publisher Event to Fire Before the Underlying Property Is Written To

There is one small gatcha when using combine a. You may need to keep a copy of the data in your view controller just for this very reason. It can be also really useful that you have both your property still containing the old model, and the publisher sending you the new model. We mention some other kind of more u ikits base patterns, or patterns that are more popular in u i kit baste code,. things like the delegate pattern or the data source pattern.