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Inheritance ,
 Interfaces and Composition Hector Zarate (@iOSCowboy)

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Inheritance ,
 Interfaces and Composition Hector Zarate (@iOSCowboy)

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Agenda 1. Inheritance 2. Protocols (Interfaces) 3.Composition

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1. Inheritance

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> The big dinosaur from the Jurassic World movie, That one that chases the girl in high heels. Not the bad one. The one that is chill. , but pink!

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Tyrannosaurus Rex

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1.Kingdom 2.Class 3.Order 4.Genera 5.Species Less specific

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More specific 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Animal, Plants, Stuff 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Animal, Plants, Stuff Mammals, Birds, Amphibia, Fish, Insects… 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Animal, Plants, Stuff Mammals, Birds, Amphibia, Fish, Insects… Anthropomorphic, Fera, Jumenta… 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Animal, Plants, Stuff Mammals, Birds, Amphibia, Fish, Insects… Anthropomorphic, Fera, Jumenta… Felis 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Animal, Plants, Stuff Mammals, Birds, Amphibia, Fish, Insects… Anthropomorphic, Fera, Jumenta… Felis Tigris, Panther 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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@interface AnimalKingdom - (void)move; - (void)ingest:(id)animalOrProduct; @end @interface MammalClass : AnimalKingdom @property (nonatomic) Organ *heart; @property (nonatomic) Organ *lung; -(void)drinkMilk; @end @interface FeraOrder : MammalClass @property (nonatomic) Organ *teeth; @end @interface FelisGenra : FeraOrder @property (nonatomic) Organ *tail; @end @interface TigrisSpecie : FelisGenra @end

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Animal Quadruped Fera Tigris Tigris Inheritance is indicated by a solid line with an arrowhead pointing at the super class

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NSObject UIResponder UIView UIControl UIButton

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Animal, Plants, Stuff Mammal, Birds, Amphibia, Fish, Insects… Anthropomorphic, Fera, Jumenta… Felis Tigris, Panther 1.Kingdom 2.Class 3.Order 4.Genera 5.Species

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Organization by Commonalties

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Exercise 1: Inheritance 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July

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1. Spoti-Case Study:
 UI

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GLUE (Global Language, Unified Experience)

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Fonts Colors Metrics

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UIKit GLUE.framework Radio Running Albums Shows

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GLUE.framework

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GLUE.framework / 1. Subclassing UIButton SPTActionButton UICollectionViewCell SPTTableBasedCollectionViewCell SPTCollectionViewCell

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GLUE.framework / 2. Factories UIImage+SPTIcon.h UIImageView+SPTImageStyleMasking.h UILabel+SPTDefaultApperance.h

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GLUE.framework / 3. Configuration Colors.json Metrics.json Fonts.json

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GLUE.framework Colors.json SPTTheme.h

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GLUE.framework

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UIKit GLUE.framework Radio Running Albums Shows

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Colors.json { "glueBlackColor": "000000", "glueGray25Color": "3E3E40", "glueGray55Color": "88898C", "glueGray80Color": "c6c7cc", "glueGray90Color": "DFE0E6", "glueWhiteColor": "ffffff", "glueGreenLightColor": "1ed760", "glueGreenColor": "1db954", "glueGreenDarkColor": "1da74d", }

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Colors.json { "glueBlackColor": "000000", "glueGray25Color": "3E3E40", "glueGray55Color": "88898C", "glueGray80Color": "c6c7cc", "glueGray90Color": "DFE0E6", "glueWhiteColor": "ffffff", "glueGreenLightColor": "1ed760", "glueGreenColor": "c53770", "glueGreenDarkColor": "1da74d", }

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2. Interfaces

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1. A scientist or business person 2.good sense of humor 3.smart 4.very successful 5.good looking

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1. A scientist or business person 2.good sense of humor 3.smart 4.very successful 5.good looking

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@protocol PerfectMan - (void)researchScience; - (void)doBusiness; - (void)crackJokes; - (void)beSmart; - (void)succeedInLife; - (void)lookAwesome; @end

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Iron Man PerfectMan Batman Ellon Musk Realizing an interface is indicated by a dashed line with an arrowhead pointing at the interface

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Iron Man PerfectMan Batman Ellon Musk CEO

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Compliance with Specifications

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APIs

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Exercise 2: Protocols 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July

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2. Spoti-Case Study:
 Feature System

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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Radio Running Album Show Player Browse Artist Playlist Social Conce Car Chart scover Genre Ads Equalizer Inbox Podcast

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3. Composition

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Engine Car >> Stereo

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Engine Car >> Stereo Satellite Radio FM Radio

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Hierarchy of Simpler Subsystems

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Exercise 3: Composition 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July 0 25 50 75 100 April May June July

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2. Spoti-Case Study:
 User Session

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@interface SPTSession : NSObject @property (nonatomic, readonly) SPTProductState *productState; @property (nonatomic, readonly) SPTSocialManager *socialManager; @property (nonatomic, readonly) AdController *adController; @property (nonatomic, readonly) SPUser *currentUser; @property (nonatomic, readonly) SPPlaylist *inbox; @end

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AdController SocialManager SPSession ProductState SPUser SPPlaylist

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Dzjienki!

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Questions? Hector Zarate @iOSCowboy spotify.com/jobs