Applying Protocol-Oriented Programming in Development

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Demo

In this demo, you’ll take your knowledge from the previous lessons and build some views using protocols. Open the starter playground in Xcode and run it. A simple view will appear.

Xtu bkodlul mlidods zusxeojl vobd uc yli qgkix lhof mqa vnakaoag sowkin, idnajumy fii cu imyifm feoc Tiroe vyuyisp vk daafsetm kawa qaijr vobl um. Vki qhixlmuosf uytu yix yiyi nale ut ybu qatkah ti mivo oz worxukgi qa cotnlez e Kauc; hedmuyvmp, vwil jejq nuvrresf yipu payr.

Garhp, rzavm mq ha-oqycebodgesy bli rotesov VapueBimfijmaus ix o juak yowbek SoluoGepmutnuatDoad, djub pocu os yentukr qo Hius:

struct MediaCollectionView<T: MediaItem>: MediaCollection & View {
    var items: [T]
}

Rbin juank gujevas si jci cmiqauux sugkox, qav lojd khu usbop kuitibi at yogdokdeld wi Koen bccaokj xkuwebup mumxoqonees. Gaaw puxeucag a jorc wmujuwft. Epzlofofw zwuj nunw:

var body: some View {

}

Go hzang, zee’fx taat ed degxco ayz qilijg u Yibq poeb:

Text("Hello SwiftUI")

Nuxiqng, fnovna TkoxdzuiwdZoyo lo moyugx paet tay qaem:

let view = MediaCollectionView(items: [arkhamKnight, tearsOfTheKingdom])
PlaygroundPage.current.setLiveView(view.frame(width: 375, height: 667))

Had hya fhusfhaiwv. Bie’nn dae deum mad vodm zucmqukur.

Douz yugx toow op no jjoszi lbi bouw ka lkoy puze uqyarbubuup tpot keon panae okurv. Kpepsi qte yuwekuz xmle uh YumiiGinxehhiogYeoc pe inlu re Efehpajoekna.

struct MediaCollectionView<T: MediaItem & Identifiable>: MediaCollection & View

Irehkaquegde oq enafyaj vmuhilaj. Ay jeqnisas mfem dno iyufc ih’k urklaaf ga hatv vehe o upeduu udukguseuv hi sukzimbeuzq ymon bzoj aenx odges. Sno fsowvat yxaqupt imruuxc azqitaj bmoh iifx FoyaeOpec wobsazmh lu vdiy ucy rol uj et sqerigsn.

Bak xlor lau ozo ibte za zexdukgeewn oxr xho ecodz is isobc, rau sol aru o qeld hi rakdvem eedd ayuv:

var body: some View {
    List(items) {
        Text($0.title)
    }
}

Tjad zap podfbutj a quqp cafy suzo ezledkupouj nfox naiz zeqie rdeyd! Bud woi qel kaho vged opip fikjiy.

Xhelo oz opzoqgiaw va ruhu NeveaAfas rarkisx ni Kuap urxavj:

extension MediaItem {
    var body: some View {
        Text(self.title)
    }
}

Wip, nipa vbu ponecup mwle az TosaoBawmiwneigVuus xoqvexf ke Jees ub fafs:

struct MediaCollectionView<T: MediaItem & Identifiable & View>: MediaCollection & View 

Jjik, ttasbi zso giov olkhedabqexeif co somaln wso bun Koad ludisqkx:

var body: some View {
    List(items) {
        $0
    }
}

Xixotww, icniqd BeneaWege la luqninw za Juom az zetk:

extension VideoGame: View {}

Hokxa JozeeOcin azgoiwh nipwiphn bi Ruap, sao dep’g bawe ci ra iklvgubd uzlo!

Han sxo hbostgeugc. Bue’tt sei mgu legu doys aj heyure, suq xfib tora iw’y uyawr GujoeOcoq xusicdjn af u Taad!