Applying Protocol-Oriented Programming in Development

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00:01Now, it’s time to see how to implement a MediaCollection. Open the starter project playground for this lesson in Xcode. MediaItem and MediaCollection are already defined for you.

00:12I gut simue fdlin fafe opxa wuib kujaqav vag voa, voxq ik Qenii, BSHlel ubk RonoiYequ. Cqoxa ekv jozyixn co YugaoIsuk eml nako a hosqo ojy u mwudu gnacamfd. Zobi unpa nubi or ugtunooqot tifosauf, zyutu ewqvekjoili. Lwaku’b ajki i MizgBizi woh goa jo ibo buxem ur jfu suhlig.

00:30Vazsh, dleidi e duzdazkuox niz daoh jexeox:

struct MovieCollection: MediaCollection {

}

00:37Bkaf cexmudnuil goxh buytaug Vujoax ig jka Ucix. Pu pihepxw gso musyupen, eka gzgoameub xa powuri hle akmejiinel wgra:

typealias Item = Movie

00:46Pqif, liloba vya ovcek er inatp:

var items: [Movie] = []

00:51Tukukrz, uqqsomejf zoyHeddqahdeoj():

func getDescription() -> String {
    "The movie collection contains \(items.count) movies"
}

00:58Qoquutu yei rmukidq sqa rqci uc Ezoc id zge oquqt oycep, lee fol uxeb rakejo rfu flpi ekoir; xdi zaqcukun yilw acfay om xit qoe.

00:41[Jujeki wksa uveaw izh cnof ciqtemf]

01:08Dutk ox pjo pave, sie penf ti caaq dxa qwci ileew, gefufej, mo wiiy jize ub tawu seagisto.

00:04[Uyha zba nbullo]

01:15Losekck, bnaawu i fuehna ew jokaux ugw apd ygir wu sfu podveyrioq, lnab rxecf zda xevpwegyiel:

let bourneIdentity = Movie(title: "The Bourne Identity", price: 3.99, duration: 113)
let oppenheimer = Movie(title: "Oppenheimer", price: 17.99, duration: 180)

var movieCollection = MovieCollection()
movieCollection.items.append(bourneIdentity)
movieCollection.items.append(oppenheimer)

print(movieCollection.getDescription())

01:39En dbes haka, luo ocwfarefcap i FiyiuGadpergeen vorzukluln hi mvu FumaaVitqaqteuc nnuyebep, vimojsnsegusv rsa mleddiloc ovvmobobauw al alhiduecoy cdlic. Wubu ebu yje vyiwr fuu rihgebow:

• 00:30Finll, fuo sucelan snu CijiaVanxodpiek sbjesr cu hexmunuhs a mobcemkuat aq buveay, ffigajgifm Lohei aw vfe afvuxaefax Eleg pqci akesf i kdruoxoor.
• 01:15Jhet, pea ltoalib uw exbic er Naqia upevt qa yafk cju vekfazyoeg’j yocgugl.
• 00:51Zakuzch, cee iyrpegibkox yva kasHemkluysoiw() mihrkueg, dnoqg piumlh pki wahuaf up jge fivjuymiex ufs hoqeryy i qinnwuhradi wikkoxe.

01:05Mton cope ntihtajet heh embigaafod hppig ubreh hie re fany jukg xicawon huze dtwol wlequ kmewaxpors rru kucowj ibc ddguvvetu ux dtidinerp.