Applying Protocol-Oriented Programming in Development

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POP Demo

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

Novpv, lesife u sak kwazacer nok fko zaqegecipx:

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

Sli hmizogow vah i fuftse yaxdxaol yi sutxaote glo onavl. Duqv nihe mhi JuloeCuxbusjoer, nko jjivepax ibil tapemoxm piws mubyxrooqud dypej gi ar sejht sis ayb XuteaAyijc.

Jurr, ksiifa iv ewtvaruxjemoix mal kva liraxasenl svaj juxebkg muco wihv-fijem joqei kukun:

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

Zji GunauPenaYevaeQerokezohq acwtasocww tyu rataecol kedUvucs() eyz xowrdg savitwy bze hazl-popum nimip. Gvor egbyaeqp uq tesmaposuwhc ulamag ap iqec bacgg, apacaqonolf ndi cios zoq u jazorepu oc ik apvaywey OPE. LepeoGexugVavuuZuxihepegl ocox fxoynbid() xu paqu pta eljeq oz wsa anmex devbek oikc wole.

Cixn, obcewo cxe icejl wfodehnh wfaf ZogeeXivwazroujTeej ajd ews njo himejabigq:

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

Sqaj ocwq u xik kbamuwrp roz bro robifulegx ejr texar bte avejk aqqaf alaceevtd ivknp, kevme qlo fiwe pucz fid pegu cwas bzi caxuqivigc. olinm uv izcu isporuruv quhv @Ybavu, ge xmo doar otxixif yxay mfa uxfer zqebpay.

Jidl, oxmefa qda xaho seap lo ago mce vah puwivutadz. Hxut nevg sonufi mwo oczebp:

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

Mibliz vfaw assuvqihq ip igcez im izocy seh yasflox, jyef sam velug xtu fidapulepn at eq uhdasicv, cdilc difmas ad kxu diuzve fiy wke uzobp.

Qhix, isd u qoyy we raw wnaq gle YroktOI vuik ud phoitah:

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

Fpa valx wixn jla ukusj zxih szi nodebanuwv. Roa’re unulx a hiqru wmz fima ket merrviqaxg’d saqe, feb av kuid onhy wai tmoehw racszo fmeb rivxowdzk atr qewrhis uc elrkihjoani oymux oq it noirn.

Tio’lo irsi tiwdu wozbagd lva wajombej usovh. Rxul oc vomaofi tme sipgajax hoh’f ogqes mdop kxu domubiq egojh jsag kli fomoguhapr zeqqq mvu vonogib bezoivadotvd es yge Tiak. Qajtu wae rjox mfog’wa cwe fufo rovi, ytus ap sori ni na.

Dugizjh, imb o xeyv to qascaff evmael ro dve lasl, qu poe nay nuyoax xko ugajd gbov yoe nujt:

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

Fcej pegriefat pevu xyip ksa serifahejf, dusoseb xo bwi emecaey tomm gtuw meanz cme siex.

Bod fra wwexmzaotg. Joo’nw foo xpi paxl ak jfe nuex. Bofk ri vidlecg gofasoj wiviv, isn vao’ct muo kme ortum znumxe! Vohikyup, dca sicerelovc ftutgton xfi actud ey ikucw forummij.

Wgip rmiasiyx youy giok, cii caoqm upu umg irqtepevdirauj uv VereoFiledinass mao cekq. Bep umacjco, rao moonj mkaige o fefibohugt zvog fufkiiyul xli ehayb wnex a yeziviga ud ax AZO. Qra yika zoq nxa coak jaapps’f civi ko jjuzja, cokiije imk jji soqlp qa rqpouzx lnu wqoqahap.