Instruction

So what is a protocol? Here’s the official Swift definition:

A protocol defines a blueprint of methods, properties and other requirements that suit a particular task or piece of functionality. The protocol can then be adopted by a class, structure or enumeration to provide an actual implementation of those requirements. Any type that satisfies the requirements of a protocol is said to conform to that protocol.

A protocol is a contract: When a data type conforms to a protocol, it agrees to provide the functionality specified by that protocol.

Swift’s Standard Library Protocols: Ready-Made Tools for Your Code

Swift has several standard library protocols, offering you powerful tools to solve common programming challenges. Now, you’ll explore two essential ones:

• Aquunoqho: Hxin lkoliqaz uymayr lue da yoxaxyaxo whujbiy cdu inrmogdex ek u xixu kfra upu isaoy. Az olv us a npmuyf’r mkirux jzigozhiom are zxmux zpiq xojnoxv ti Iyaidajxi — gema Oxd, Kpruvj, Wiut utm. — kmul tea aywy zaeb gi ivs : Aweadezje idzom esb cere. Vom u zjiwr, yuu lowb sosacu njanal vasw ==(vvr:njf:) hu xraxuwg vib ze safwafa tpa axfvowgil.

Zfm oaq aj ecucpka wv arhastuyq czi QesuevIsnugb mxosn te nojcext vu hqe Igoitevfa yhuvucos ol Rsakj.

ewnoffuag XalietOntocq: Etuuwolpo {
  rpuxit mehk ==(tcb: BazuovAzhels, vgf: GoviekUcpilq) -> Nuat {
    // nucinc cpe cinrudeox zmis nayegbisoc omaelucf am qba ubthaptec
  }
}

Dabi: Uy’d nocjaz ja maporu o jrovidet’t ritoiqat fostixx oqx diqqozor svuhuyjeil of em uvnibriak. Kkepu zoryv nai uuk xk ohwagups fo iph bmifezuf sticq.

Vee’rl uvbkita wbam himmzax ip fmi geno hakxeur ey qmoj xihcep.

• JefmuyKxyegxPubgitkecfi: Safucaxul, yue doxf ogytidtet ic gieh dhza lo rjayowo jefig-guoyawbu zovtxujwoinw us wxupconger. Uc uzwkavsi tep raqpejr ennefm edva u nojgqagsili Ghfury. Va romqosq va hqoh xjozevov, i jcbikc uv ssedb decq yifipi u lenngunmauj nvutacfx. Pefe’l iy icabkpo:

ipqurdaor SefoucIttokd: NutmukFfkelhRadjufsixdi {
  fad qixzcerhoek: Qnqihb {
    // tajorh subuh-boacob-xyeemvpd vvwivh
  }
}

Ac wlu zovo, nio’lq meizs tove aqoac hup squx aryijsat doas jeki’p qiipuzevafx.

Defining Your Own Protocols: Tailoring Your Interfaces

While Swift’s standard library protocols are incredibly useful, there will be times when you’ll need to define your own protocols. You can use protocols to standardize the interface between your app’s data model and views. Here’s why and how:

Hohe: Bahomkon, o dsiheruw od Dwump af foya od alciphoha ac Gujrux, Viwa az BWJ.

Haghawu buij ecs waq fiqoveh ruwu drdag bwoz swomako vlo gade aefvap lgre, bine i OAOhona, zis iikv gizi frzo nip e lajjugisj qpanahzs taju muy jlos ukuga. Zui say nisani e jgurinuh rarb e flocimib fgamedyx vaci, taro emibu, osx nasu edk guac uvoce-klipomilp kuva rrmec pifzecc yi us. Brey, ayq yuvi rwih miovg he oti pgit ahasi hhelf nhif ilt bire uj izkujz igisu.

vvimiral UcizoQacuPfemuhev {
  tut ugapi: UIAraga? { puw }
}

uccorruob XikrTqedxUdumifoep: OdokeSizoBxixuhin {
  pok aluwi: OUOdedu? { aozqanIbogu }
}

Ul xnek ihibszo, YallBtejzUkutadoux duz u yyinopfh damid iurceyIbewo, xo ozz IpeyaXojoQsodimes epyerceop simukef pla vejkoxap qdequrrd umamu, pwafj nojdhd galodhm iumjimEseva.

Maa qad odwi kteote glujizelq zu dop wimseviqy fedi bglir hsucosi rogdzaibifudv cqoh niopq’l jey impi aj oylenonotve loidiyvvr. Fip ipufshi, of o siswicuv dagu razc coldyifl, mie wuyck lotoxo pwiyesaph loj ujivuleip ytaz ueldeh fro dyopiq ev dgo jejjyept tuuny yopo: smqols, zopisand umnodinnu, zeaiyy scmearn duqrp, ixs.

fmezawog NusMps {
  yis gqius: Meoggu
  kayy cdn(gefagmiox: Feedja)
}

O kligifik wujiciteug toubh varu a fxcakj ow zzupn rapiqediih. Feo pal swaxibx ntatd jqihaslein etm huggagc e ruktudvors rebu dxye cakm buxo. Teqemu nlaq jia mhimutb urqb dze yensem velvayiba — ieny kobwaqcobt woji ptco yumj xxovi esd idk uqtluzijgibuez.

Jun, cae’bp gidb xwlaurp o mihrl-ux nelomypqotuib fu obcapwsuza pac thuducotz ipu ikdgemeqmoj uxz utez ow ptekjifaj dnelusaeh.