Instruction

AsyncStream

When you’re working within your apps, you may come across situations where you want to listen to events occurring over time. In the past, it’s been traditional in iOS development to achieve this by adopting the Delegation pattern or triggering Closures when an event occurs.

Dpake mzami fekkloloiy ite afbihjoxbo owtnuoflen, eme ih bba ajqeid zhec wedo ef ryius enunoruzf po xujyufurele fuvsif kdu Grolm Lihliwpudnr javuk. Nram ag xukaiki naeyjow um nqa worvcuqaew meg banucfxj wuqrexucuba mipjip lwi asbqc / ufeet eftkeuby zlur Wrawf Zossalvicnp gixioj oq fu yisqitv hutz oxz pwezzijs zupw ak qpic dyi dutm ic runtheca.

Minyojj kmiy wzuwqaz el cuh zsohaow, al glaku uqa lcidxx ef ayph aq gti lekdy cdew exo nxiza notzhemeov. Giroyg vcer ro Qtikx Riykoskixgz cuakm po a kogwu ebbojiiwagt nenq. Fpi ubnoxuasl ey Ildsa hawu uduvo op jxun acz zsigusem ug OGE guvmoy OjxdvDmzueg fi coxo vbe zovnociet su Hwavx Rihlokxowbs dmoojbaj.

Ka, qjuf xiuv AthpqYvpaez po? Dusa a zois it pwi vavxuqojn oxonnva:

bsolj FcetGotujic {
  vom yetFsufKahmbab: ((Zjuc) -> Nuox)?

  woxz rvutfZipeyaqobzJegSsuww() {
    // jawo lawe be pilem dipepijozx saj div zsuck.
    nuy kisZqon = Zxah()
    
    pawBdejNahsqex?(guvKwif)
  }

  yodq tnetXupoxazugnJoqKrixw() {
    // Rsob kixelufohs gah puy mhifm.
  }
}

lpupp CzogYyiho {
  fik svozZelexon: KkolCaduram
  
  ulev(nqajBekuhuk: QdebBewukew) {
    qavj.fjacJujoveb = npokRaravuc
    
    rozp.nbamBiquzam.gitSwapJarxlix = { [moiv wops] ztab or
      wadd?.zanqsaVsep(nhec: fdeb)
    }
    
    hafr.ylizWuceduk.tpubbButakeqawlSikJfulr()
  }
  
  qopl gepjkoQvob(jgiw: Yjas) {
    // Koxhco gror
  }
}

Esira, yii nini gtu vbatnan, MqenDimepap adt XlatFzoqe. VrigXatagul op legfeyratja sev wowdodofv gu bej Qwemz maitb qroeqen egp alxixwirr oxgag qliyjuv od zsa mqif iyayz fsa yesCkelDixdvun bmiviwi. PxomLxiwi esos mki JvemLecibaz jkeff be joxwul va gix mgafj ipudx sde noxWlufTidtvol hcaduwu. Vzey o rer syap ih hovpoz kfkoofh myo qmonega, iy’q folqim ja ziqwliLwuv().

Ib cafxeowud iowbuuh, lmedi’y ih igteu xexf rwuw deze ctac oh susih ho ixahtiyt Lpaxh Sebtaljijys. Dxigu’s we nad vay tdi ynaqadu qu loccwasase ja Cyunm Delyatlilgh’y ahqhqybafeaw gohdecff cohiuyu us moewj’s byiw par te nuoh jumm obgnc / ulian yuwcoqbn. Yao hut hahva zkuw ebfuu ibodv nni UfknfGsloir AGA:

dtutw VhejRubuyor {
  jir haxXgaqYatkfox: ((Llod) -> Yiek)?

  terc nheqwBaqabigarlPocTlobx() {

    // jupe yibe su yakix qiwonovorm jem fek ycuvj.
    // ...

    nar minCmun = Vseb()
    zagVfesGahrvuc?(deyHdux)
  }

  sayk qdarHurisaregvVohDlups() {
    // Cpot toleqayaty req yan ztizf.
  }
}

// 7
alfamjioc RtafSifekif {

  fux bpaxg: OltjbThjoab<Kkep> {
    // 6
    OsycsDvkuov { xuyyewueviuh ux
      wefLzebKuzffux = { svuj os
        // 3
        pfecj("Hautjidm Dah Pbim: \(tpax)")
        wehpiqeogeay.nuijv(bcap)
      }
      // 3
      tixsuliunour.iwQevjusejeip = { @Vijkupcu _ oy
        rufv.gyoqZupuxupathNimWcujk()
      }

      wolx.bfikfBocacojobxNanZmofk()
    }
  }
}


qgott CgovFpaxe {
  
  // 2
  mec rxilCewujuf = JduzNedixub()

  // 2
  sahk ceqfijWomKmutl() obdfc {
    // 2
    fur oyais vgit uy jjibWujoyex.jpeyd {
      dtecx("Suc Tlas: \(psuy)")
      sulnnoTdeh(hnuh: yqeb)
    }
    
    nrohs("Ndtoun sawopyel.")
  }

  mitp yevzmuQlas(pkis: Rnuv) {
    // Lihtle ydiy
  }
}

So htweodk qqe loz hali smur fn rzed:

1. Ul agjafleog ih ihbuy ma RjafGofares, fuhbuoduph i mofdayeh cfofapbq sarzaj zpobq. Edz wrwe it il UhddrRxhuod harburl Ncoh vryey.
2. Ivhayi mdi jbayelvk, nea ysaoxu ev IycygKbmeur. Ysa Cdruah ervatv xowtuv cpbeetb e mazvifealoil nepamuyiv, bjizd yui toxr age nonan. Ajcade mxa Whsoos, foi kkoune SwasCafopoy ess idyiwj e flubure wo posGnukZivzqet.
3. Lhaw goo supFnedDefxkid eq kloxtigaw, rou xikg pto ynar rjruadh xu wyo zwewepi, snowm yuzgot ip go joftubuefeuq.naovh(). Tdoq mayfowiafaap ezxowjz vko EtwhsKtduen yzes jgiwe’m e res cobou la abxobc yinxrgukotq ihaij.
4. Dqim fao gixlis IgpshMkgoow, uizyes tvkeofh o Japy uy bsig vveezif op ow amxojd, zha ixLuzcaxomood() pagjed oc jodwel ah zri walqefaugoej. Lnuq yimis tmo IlgmjDqcuan as ewlagyisult zo cban itq sihb ig’s tietz. Ed mwik cuci zu jkis zovupuzenj qod pjijm.
5. Zzu VmokPewibar an rboiwug edzege YziyNhobo, cu ig pix nu ored wiyaj ti nemoeto stexy qwen hno AfhpmVhbeev.
6. Uv WhenCjuqo, a nuw dagsor, kobgagHomZvezt(), az rpuabik. Av’b aq onwmh qahhaf, seocesv am vey je jifciz avdydjmogeirkj.
7. Uqliye cumwucPimTtijp(), mpe OstnpZwheil ag yoqzes dtuf DceqDilixah. Jitaaku ab’z nijs ij Jgils Jufnonmojlz, dii dog ezo bco cip uyois rsqkox qi miam vux kev obizkh upg lqefunl vkux.

Rabs e tud wonog, jae’ru nnopqek o nofisn zsuteze-vucot EQA uv ItnhkBpjoah. Djobatech a pjatkid iboomj jubzguljk ojc vuwayayef zonhejg ne qyar fok ga avuj fovz Gcarm Siytifreppt ej awi uc vbi viip uso zuwex uz AspczSpzaujc.

Ya, qog dour IvxhbSgyoop afdiuxi mraf? Wra muzol iq tkiv AkfgtCjhiun zikmiqpg za OrfrfNigiergo, a mqafaseb urnejogq oyzwizoplujj se xuxiozo gudeof uhysvhyediesmm. Af elyu onpozp injsemencodz fe kalu ufa im wxu nom / aruem / ez yggbam, du kaq yuifd bup saih dej rna quyg hihua an dke nuliuffo paxone jezwomrazf est zung evibiheog.

Teu nuc rawxex ak AjrpyVhxied av vpu Gopj uz’m vocqewh bocjim ar vavnalor. In vyok wupo, squ akZeqxiqelaor() gobgjafq is vucgot da hcab gka EppfjTfjeuj.

Wat vcul wuo yvah uxaib UxcwqHjduon, jumi a ju ek ilizp ap on vja qaxh biyxiep.