28.2 SwiftUI Dynamic Lists
A list is considered to be dynamic when it contains a set of items that can change over time. In other words, items can be added, edited and deleted and the list updates dynamically to reflect those changes.
To support a list of this type, each data element to be displayed must be contained within a class or structure that conforms to the Identifiable protocol. The Identifiable protocol requires that the instance contain a property named id which can be used to uniquely identify each item in the list. The id property can be any Swift or custom type that conforms to the Hashable protocol which includes the String, Int and UUID types in addition to several hundred other standard Swift types. If you opt to use UUID as the type for the property, the UUID() method can be used to automatically generate a unique ID for each list item.
The following code implements a simple structure for the To Do list example that conforms to the Identifiable protocol. In...
