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Buckets of Code Ben Scheirman @subdigital

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M V C

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M C V

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http://www.stevechapman.xyz/2016/03/three-buckets-can-change-your-life/ Model View Controller

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M V C

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M V C

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TDD Inversion o Dependencies Separation of Concerns Liskov Substition Principle Composition over Inheritance Open/Closed Principle le Responsibility ’t repeat your self ndency Inversion ion Princip oncern Lisk Separ Compositio Open/Clos Sing nce ngle ty Sin ility O Si

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TDD Inversion o Dependencies Separation of Concerns Liskov Substition Principle Composition over Inheritance Open/Closed Principle le Responsibility ’t repeat your self ndency Inversion ion Princip oncern Lisk Separ Compositio Open/Clos Sing nce ngle ty Sin ility O Si WHY?

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Ship Great Products

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Iterate

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Embrace Change

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Ship Great Products

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Ship Great Products

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Ship Great Products Complexity

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How do I get better?

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Give each object a job

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Give yourself more buckets

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Photo from MKBHD

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“Massive View Controller”

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View Layout in View Controllers Scenario

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Rounded Image Shadow Rounded Corner Sections Thin Line Borders Custom Highlight Color

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STOP Arrêt

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Extract some views

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ProfileAvatarView StatSectionView ActionStrip ActionStripButton

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c v v v v

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c v v v v •Smaller Controller

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c v v v v •Smaller Controller •Simpler Autolayout

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c v v v v •Smaller Controller •Simpler Autolayout •Easier Reuse

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c v v v v •Smaller Controller •Simpler Autolayout •Easier Reuse •Leverage @IBDesignable

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View Controller Flow Scenario

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Nav A

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Nav let detailVC = DetailViewController() detailVC.dependency = someDependency A

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Nav let detailVC = DetailViewController() detailVC.dependency = someDependency A B

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Nav self.navigationController?.show(otherVC, sender: self) A B

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A B Know your dependencies!

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Nav A B

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Nav A B ?

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Nav A B Coordinator

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Coordinator

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Coordinator

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Coordinator

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Coordinator

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Coordinator

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Nav Window

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DataManager API Client Nav Window

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UITabBarController DataManager API Client Nav Nav Nav Window

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UITabBarController DataManager API Client Nav Nav Nav Window Coordinator

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UITabBarController DataManager API Client Nav Nav Nav Window Coordinator

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UITabBarController DataManager API Client Nav Nav Nav Window Coordinator

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UITabBarController DataManager API Client Nav Nav Nav Window Coordinator

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Nav UITabBarController DataManager API Client Nav Nav Window Coordinator

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Nav UITabBarController DataManager API Client Nav Nav Window Coordinator

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Extract View Controller Scenario

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1 Screen ≠ 1 View Controller

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• Profile • Stats • Send Message • Follow Profile Header

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• Books • Tap to View Book Book List

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ProfileViewController

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ProfileViewController ProfileHeaderViewController

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UITabBarController DataManager API Client Nav Nav Nav Window Coordinator

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UITabBarController DataManager API Client Nav Nav Nav Window AppController

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UITabBarController DataManager API Client Nav Nav Nav Window AppController

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UITabBarController DataManager API Client Nav Nav Nav Window AppController

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Give yourself more buckets

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Ship Great Products

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Thank you Ben Scheirman @subdigital nsscreencast.com