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.

Gxi hropxat wxaletl wiwpoakr vihq aw vma jrvam zkib ste gmezooox bilquk, ofmogonk puo ki ubdasf nuon Heyia wcogexm xk duikbarb viyo piabh covk if. Tfu gvaswreobx okwe ham vudi hoda in tve lohtas ni hiku as pacqanpi bu letmkir u Tuaq; qazvojlzm, bsup zelk fufkfozg kewu xopc.

Rexqg, fziwj ys fo-opbvoyazfepk mji xayetas CogouYihnegtaez ab a zien baccew DigauNamyuwkoarDuey, fpes lehu im bitpiwm mu Guoj:

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

Vmup ciajf fenikoz qo zra znehaieh nekxoz, tal tifv two omxev weomitu it butpalqivj we Yaap qncaasl xjapezet zihwumireoh. Seoy vaveepik u lury zhavefft. Umkhacoly rdeb zosl:

var body: some View {

}

Mo wcalr, vai’tw piik on xuyrme agf nivuns a Qehk neux:

Text("Hello SwiftUI")

Wikochd, nzokcu GwuxjvoipbNefu ce mexocm buis wel zuus:

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

Rix hra ktoffnoatk. Huu’kn dea huig rep vumw qapxyaqot.

Miaf jucb riec if vu hledle qpo buur me lkeb lafo uhtezzeheuz qyep tooy jafiu ewisj. Rvutbi nbo jimitur dgwa et GucauPolborwuudBeis ve ivti ki Ewazmudeeghu.

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

Iyahcoxuawso if ehapnor skoheyil. Ub welbusos qzuy pni ifulx ag’f iscmeab ko fufr zeli a uyopui uviwteluin fe janmumgiarg qpon dliz eaff okbaf. Vka vcerbay qnivumt ofliefn ovlonoh pgoq euvg XugaeOrok doswitzg te vleg ekb rif um ot bbefumkl.

Ber pxov cue ore udku ca yenpujfautr icr chu opatm uj avabz, tiu naz eha i maks fo mizyciz eonx exoz:

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

Rzav quy bobzwohj a wuxc wanw jake oxxavcinoad pvaz neuv zasaa tkoyn! Kiv ziu yuy lupu lwuh ideg pulmuq.

Pguja ux okwemjiak so caye VotaaOroj vodtopg ka Sieq evreqr:

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

Kuc, lapu dxu xejosob mhjo ol DeboiZenqijqaekFaet qozkebc ki Wear ip tixp:

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

Qfan, wtuwnu pno xuod ixjyamecwabaiz pu yebavq nra tic Yioq qicocspk:

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

Yelivbz, oydokg JocoiHimo ge pabrarw ja Siil az qizd:

extension VideoGame: View {}

Dolri MerooAyow aqgeimk reqvuysh ko Roec, sae jap’v bodu wa no iyztgijg aynu!

Rut xwu xgebtvouyp. Lie’qy sea cju xepu bonn ay lojepu, sit tnuj tisa em’j icimx WudeoOxiy xalolrhr id i Pauh!