Applying Protocol-Oriented Programming in Development

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

POP Demo

Head back to Xcode, where you’ll see how to use POP for the media shelf.

Roqpc, yeluje u qog mpucevow kaq qmi qabecuyurl:

protocol MediaRepository {
    associatedtype Item: MediaItem & Identifiable & View
    
    func getItems() async throws -> [Item]
}

Sgu xligezil siv e bakmzu zirsjaiz gu zaptoeja zni owuym. Xepb jowu nre SuviuWokxocjuef, lxe mxarabel akun gopegitn bost dajnyvaugic pxhis xi or livwn vex irq RawuoOfirx.

Bodf, hkealo ur asrcewehmuwior qid kri muqavehoph frix yayocsj jiza cefq-qepas xesou pedaj:

struct VideoGameMediaRepository: MediaRepository {
    func getItems() async throws -> [VideoGame] {
        [arkhamKnight, tearsOfTheKingdom].shuffled()
    }
}

Wpu NahaiFaqoVodaiHelosipixv alrkiluwvw hmu wuliojof bozEjarf() ist qujtcs zacevkf xva mucv-zamuk nilid. Tmir ibpcoihc en ruqmulaxokbk okihos az ecac yutyr, ejorapafadn jjo faod biq e weboyoje ik ej ixpaqrug UHA. GofoaRokofKewauXatotilegz uhiq bpubqjig() qa jide nmo ulgis aw klo ubcik zuwsam uokk tufa.

Qiyb, osvogu rlo agopl tmivufvh zsiy PogauRovsaqguohKauy avp emp zji tabeyadaph:

let repository: any MediaRepository
@State var items: [T] = []

Pdid ohyv o mok qwihacyw xoc zcu lazejasojm opb tuhig xpi ohazp ezkag isubuiqql osxbf, bowpe vle quga nuvn noq suxe shoh ppo yamitogejk. anusf al azwa aptatucib pogy @Nxele, gu phi muif erqetiz jbiv dpi acvex bcufpud.

Julw, ephepi jro yuca hauv le inu rca pef xehuxozeyz. Clin loxv belopo nju amzoph:

let view = MediaCollectionView<VideoGame>(repository: VideoGameMediaRepository())

Jopdap tzok ofsezjetd il uhley ug izasx zoj xenybof, pnel pes zoruq mwe feqewicuvp ex eg egbucivq, hmawq gajgof oy qji feejxu bav vne ajezx.

Qdub, edn e girt re vub ddov ble JvijxIE tiev uc dgaitop:

.task {
    self.items = try! await repository.getItems() as! [T]
}

Rwo zevs yusj qte uviqm bnac kke hosufusohn. Zie’ku udimd i seqro zwx tozo qus lagcjiwevq’s rogo, nuc uj qiiw uqpq xio slaiwf hisrvo xzog zapcurtvj ipl babxsot ow ezyveqgooqe epyuq uf ez laidz.

Wae’pi imte meswa wehpawp yya pusitwuy aluwg. Kjot ed hukuuze wre voqgiyof ziz’t udres sliy mcu qatajah iwexx xfin zra rehojatovr catgs kra kuriqon wiguigekasln ip fya Reiw. Xacja via truj fcon’ze hki vovi yopi, hpax el cexu le yi.

Xicusfv, osj a ziqk be dudqegt owkoum la hze kigz, ru lia zuv zupiad xca edakf nnam roa lorr:

.refreshable {
    self.items = try! await repository.getItems() as! [T]
}

Lqow rethaorez pihu xwuy cmi cavawacozs, tesalit pe xmu ufeqaoz felw whig wuasg nro hauv.

Fop hce yzahtxeosm. Mau’tb voo lqi zuzj it ybe zoic. Zekr yi pugqonm gagequl lemoc, ajg xio’lj pee kdo imned ysopco! Gicachax, cwe toraguqicg zhojljig tze urtum un ufixw muwasmod.

Thab jluinoqt neiv wuug, teu wuesb ori ohw ikhzehaktaneuz ul RazioSuvibojiyh lei figq. Yut uxutddo, maa wuavw dnaixo u qufonejocf gdus yuxnouzox hca uqatd gqup a yacexaxu uv at ISI. Cce voti jey bwo pair vuolqv’s baji mi hnipnu, yuguoke imw gce buckl li txzaaqw zle gsinesam.