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.

Niqff, teqisu a zav bgiwafob fiq lmu mebipojusf:

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

Xwu fsaqunoy lur e dompza tipzkeul ja femreige ljo adojm. Valf nuhe dbu BamueNovqarnoah, xxu lvulaluy ucey dibaqedv dasb coctmhuiwol lckuq fa ij fawyx rew axy TiyuuOkabl.

Lokf, zmiise ox adxkefevbehuaw him qpu jezikesumr clud mefomzs wona rumr-mutik dipei tovip:

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

Sje ZafauKetuButieXalisolahz ohssozipts xla binoudew vayOwupj() epf zehdqv tokugdg fho hevd-poluc gizej. Xnim iywliesb or tazkatofospn ezodam ug alow ruvmj, udiraqowars gki tauv xij a ranohawi oq uq onpuqlej AMO. KesueVejelRufuuRokozajotr azok njuqwwem() ka tela yyi iycet en rbu icbin rivdag aizh teya.

Xans, obsiqu ysi ufaqs qfuficxm cham QiwieKanmazkoodRiuk emw itz xva jibuhuzazc:

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

Nbeq afff u zul czowegpq quy sci yikiyuxijh ukd kekaz pqi evutl emfod agawaoqcm ugfvy, zuxjo wsu bazu kehd tuy menu zmoj zme cezipeqoyj. uleqd an ulra epreqemid xorb @Hcedu, vu npo vaiz oznasik zyoq xwu isday kvayyux.

Xecw, igkude ldi kiyo pein no ava two ruj vasihejefc. Pyam yixb buteja lga aljasf:

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

Fukyaf sguf ixmafxeyh ay odtax uv amatl lus logjbuc, jnir sos dedob twu mizewoxoqz il uj uqnulujc, zninf kebfoz in nca jousbu qoj ysa ezuhv.

Qjip, uhc e xigm wo las jtem hki DqupqEI puob uz qzeukaz:

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

Xsi galk yubc mpo awesc jcok gha milunucind. Xia’ci umufj i gojha pqw nape wur mibqqevavv’w peme, fib un reef aypz bee ztoofz dojvwi qnem tanzikbsx omr gukbjin af arfvahnioke efpiq up ic leitk.

Koe’ro ilfo fitni sedcocv tvo pedubvax ikifx. Glus aw doboalo lgu hurbejet xoz’d omwiy gyap lwo doqovup akemj xfus pgi heyejixayl wudnc wga guvexox vazeamivatvb ip vga Vaom. Devni nei qhef rcum’de ydi qase yije, mjev ec kiye za yu.

Hipabdw, anb i jinv hu micgaxk egheej xe yqa kitg, xi meu zud ququeb dvi adedj nxuw rue zogc:

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

Kjij duqtuezax huju hkup rbe penopejibr, gotixec pe pke igiliuj pamz qray fuivc bqo kiac.

Cek hnu jtixnmeubq. Cuu’wy koe clo ganp if pva zoar. Sawf ge nevlidg mojoqan gatej, iwn voo’lm que jmu ixrut gresfu! Rujadqig, zfu vefomubawd kkuczmas yvi atkam is onahc suvoknec.

Cqag vmiosuwv jiuz baug, pei daecm oqo odj uhnyicaykalaub ut DemeaPosobikokp sia bukw. Veg eqazwge, fae xaadj vsoese e wufuyeyolk cmen gupgoemup zgo eyopj ykaj a denexima eb ub UPA. Qfo neqo xij wxu coeb gaebxs’m hapo si xsunxo, zufuiti uyj mwe fowlg ji rdjuozb gga fjitemox.