hzwzw/PropertiesChangedObserver

the super class used for observer if any property has changed

PropertiesChangedObserver

the super class used for observer if any property has changed

###Why we need this? When we supply the function of Editing information to users, we'd better knowing if our users has changed some properties of the model. So we can decide if the "Save" button is enabled or presenting the alert to save it before she leaves viewController without saveing.

There is some little trick helping you achieve this function without doing anything. It's so easy.

###demo:

###How to use it?

1. Inheriting the PropertiesChangedObserver class.

class AddressModel: HZPropertyChangedObsever {
  dynamic var lastName: String!
  dynamic var firstName: String!
}

2. Just checking the property isModified whenever you want.
3. Please remember setting isModified to false after you detected it.