Скачать или смотреть Add New Day and the DRY Principle - Part 31 - Itinerary App (iOS, Xcode 10, Swift 4)

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If you've ever wanted to reuse code from another view controller but didn't want to duplicate code then this video is for you. In this video, you will see how I create a new popup view controller based on an existing one. Then how I apply the DRY principle (Don't Repeat Yourself). You will learn how to extract duplicate code into utilities or class extensions. This is a long video that is broken up into many parts:

00:00 Part 1: Create the Add Day popup
18:16 Part 2: UIViewController Extension to instantiate themselves
26:21 Part 3: UITextField Extension to validate themselves
32:07 Part 4: UITextField Capitalization property
36:07 Part 5: Saving the Day Model to our data store
48:00 Part 6: Adding a UITableView Footer for extra space
49:39 Part 7: Minimizing Data Transfers to save time and money
54:32 Part 8: Inserting single Sections into a UITableView with animation