Swift properties can be trick, and is very important to have a good understand about properties to be called professial
Properties are a fundamental part of programing and it is a MUST for any programing, this course is all based on the FREE iBook from Apple that can be find in the apple store called "The Swift Programming Language" it has 561 pages of Apples "super simpler language" but before you run download this ibook let me tell you what I will offer you in this series:
I read Apple's book cover to cover, I went through all examples, I talk with many Apple evangelists and today I am what they call "Apple expert" however I talk plain English (with accent) with easy, simple, everyday applicable exemple. And if you what the videos, run the example and still having questions I am always here to help you.
So know you have to options now you can download Apple eBook that explain properties like this (and have nobody to ask if you have a question)
Properties associate values with a particular class, structure, or enumeration. Stored properties store constant and variable values as part of an instance, whereas computed properties calculate (rather than store) a value. Computed properties are provided by classes, structures, and enumerations. Stored properties are provided only by classes and structures.
Stored and computed properties are usually associated with instances of a particular type. However, properties can also be associated with the type itself. Such properties are known as type properties.
In addition, you can define property observers to monitor changes in a property's value, which you can respond to with custom actions. Property observers can be added to stored properties you define yourself, and also to properties that a subclass inherits from its superclass.
In its simplest form, a stored property is a constant or variable that is stored as part of an instance of a particular class or structure. Stored properties can be either variable stored properties (introduced by the var keyword) or constant stored properties (introduced by the let keyword)."
Excerpt From: Apple Inc. "The Swift Programming Language." iBooks.
Swift: Learn all there is to be learn and mastery properties
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