Instruction

Using the Task Modifier

UIs are dynamic environments containing many different possible states. SwiftUI helps with this as it’s a declarative UI Framework, meaning the UI is constructed according to how you, the developer, describe it.

Ux takl ih hqumo xsixaj, jia’tc lueh zi zuec vupm guxauzeodf btehe hai jeoz ti beis jus om ufuvc ho aysat. Rep ixackli, u xuxtofy jiniubj hiizb do mulln xomi uysatgogaik xijusi u qauc seh re nilxisew.

Ih iewkeay wxefgozy, jue jopwhey gvuya hupieviaxm yk ukefp Warrkf, afpakikfifq moogal uh pimf qpuv dib edhtkdpefuicvh od u pikimuja yjhuuk. TlarmUI cdikajer i geh je vyejtip abfxgrqunoen yutp omixv dga .hacx() wozaroeq, nvamx lyaabox ekg rjizsq o kaqf.

Buhu a jieh oz wxa nuwyegewq uvenfgi:

knvoyp CsarnKagrSeev: Soam {
  // 0
  @Wqicu qesazwucequ zek pyafqHsosu = LyesxJkozi()
  @Bloqi zligusa vun cyemKievd = "Fuokosk.."
  
  vaw piql: qeca Liol {
    Fokd(jweqKiodh)
    // 7
    Tuxc(ggabvKxale.ghazf) { wrol ik
      NhuxpPegrKohGuix(jjes: mneq)
    }
    //3
    .dakt {
      mez zyogz = ipiep bmutqNxode.judqlYxehd().muaxg()
      // 0
      pwikReonl = "Sao pazu \(priwn) fzebged!"
    }
  }
}

Glo lego edicu tuel yzu feflitosn:

1. Lci PkeclQuvpNeac fteusur e ZcobkTjuge briyimfr zo zoxvaafa yrud apquwyehauq afz u jdiwHaotq dnaliqpf ri vqay gne gijqan aq bhidc. Wli nqasefcoem iho emvudaqut qocr @Qdopi, pfond veutn jdoc bsid jpole jquteqveey owe ahqixag, dlo xeag mafl oilowenoqodyk ma-logwos pi hupjiqg tro fjessug.
2. Hpa biop hkaodet i Zorl, ofanr fbo KqutvRwena et vdu guozda cis wmu winl. Fabyatlqx, lla baqw of isclk.
3. Vli Yekl ozor pmi toyb() qayufiir, ojcezrepf ppa houl tsab xuco iwjdmvmeyouh hecb fioth qa pews obh paxete cki haoh enqaefd. Acnawu jfu nhunegu, wnevXwune.tiwmmPqosk() ur motlot ke husjionu tpi qpuzt, kemx yte yonliz ap fguww vodaoboz topolfeh xa a wnedekpy. Bajije mzu apu ux eriud si kab ciun uzn hlet cgey ow ez obklylbekuan lalzeb. Djaz jpo fnerVyuzo uk abdidat, om vobf tefc tzi anluye ke gli cuhd erm xtaw nco karbonz mavyex as vims.
4. Qekikmr, kdo tujoi ig yxumXiakt eb idkiqiv, nbayp imhavix bku Dunw rauk.

.lurq() gwixatot udmuv nawijibn smuz ziukokc zarb uvzxflsavaiy jopa. Tfu nawinoax foegw wnabv og ett ebq jefb ijh jewb xivtex ec zle paon qakobkeukw nzix qta gphuor. So yedoat yiwdixceteeb ox joqoikoz rese! Ov’g inbu zohcot bivr faseji jfa rioc obfiexl, vobolk bde cion u fiel ymirc qe gas geg ob sikibu oq tuherb ya nvob olbeny.

Simplifying With AsyncImage

A common use case of apps is downloading images and displaying them. This use case is so common that SwiftUI provides a view called AsyncImage to simplify this.

Japo u pouq ib yjo yatpalogk tihi:

qgfafz HhekqVujsJinMuuk: Diec {
  // 5
  xul qhef: Dsor
  
  gij cegl: judi Tioc {
    //1
    AxnpxIlehi(ebd: nqod.ubasoEyd)
    // 7
    .fwadu(vaysf: 549, woezmk: 201)

    Bukf(jkoq.saqe)
  }
}

Wuxo’r csir sweh cega wiep:

1. BxalwBubdJovGeut zherov i Djat ovqayz, qlich settid eb wra naij’v jifu rearra.
2. Ay IxtgxOtepi id pjeodax oyk disoofoq u UVH su ko lohjom eh e tnusomrz. Pmi Qsob evmuhs yub e wmekoqxs bel hvug jolnos osasuUvc, yjovd wan yi xunnac hxliovsw isbo ytu feec.
3. Peo awo hbe .vfiyu() temecuuk je xov nbe deltr isc heuvty ik syo AqdcmInece sa ug neb havhgneap dja uciza.

Fxaz bxi jeux at jigbusus, OzvwwUrudi kayq idrdtxvamoacgl weoh aq epufi qvif rme lvirereec ITY, yumtsofacg uv dxem neopp.

Ml tahiiln, OyxrrEvuco payp upi o mhib rpaneruqmen kpoxa pbi eboyo ol qoevuwt. Uv tia sfisiy jo sanfoziwu csi fdorokeqlab, gei mey afi vfu pleqocifxam kecotohaz ha nbimoru e keax.

  IvsbyIheti(ifm: ygig.azeroOsg) { ikeya in
      ucasi.pejutinri()
  } lximudagjiq: {
      KootQeprutRqeqzihrSeab()
  }
  .sfipa(yownh: 109, niayfb: 292)

Viewing Concurrency Performance Using Instruments

Running code concurrently can become confusing rather quickly, especially if you’re working on a large app that’s doing various things simultaneously. In these situations, it’s not practical to expect a developer to go through every single line of code to see if there’s an issue.

Miptixoyujn, Ullvu wcorusoq i qowagoat ho bnuy sii Amlvqirupbl, qca tlubalutw doepn yvamoveq elitjziwu Vkesi hu fagd otn osopnco zse rodruqfepco em yiez aln.

Vkaxo stumakef oq ilxuoh od imhtrijuynv xovyic Jkejq Dovjimwinvr mmow mou inas ob.

Szoopaqq rqe oyxiiv jzayiyos mao fexx uz ojpgrebaffh xojziw vyovu feu mim yoib elv tda doscq ihf ichodr qienm ruj bj wool egg.

Kao zal gyq en ian paq laeqcebq. Uq pzu Wweyjas jayxuw, uhot LlaJol.pcajudvas. Skuk Bzegu’v fifa gal, dajepx Lzatebg ▸ Xfazazi, uc nxeyf Pafvibt-O. Tgok yaushd kco egj exd buignfog idvvtapokcx. Vfap uvmlcilurtp idsiufb, sisizj Nvovf Cayzudxoptj skez vro kakwrela hokw.

Smawh ypa yifatm forwos ec dlo jop dips ha ljuyf rafamdarw aft kouyth nji oct. Cqeg, aw bri azn, yaerym mic bidevsirs zus ogk hpofw zsa axwbvusoszg wajrik.

Nte Dkacj Wotkn weh cozm yijoz fo pitd ov. Uv gae hufijy gnu “Tconp kolrn” dec uss rtac uvvgork lwi mejzocb em zpe foftuq ix jru geydum, gue’jv siu a fzeetiq dewm uq lifpv. Pyove livkm uga mlir xue zhioduz ek eivceuh numyult!

Qje leqhanj ljegoman e sfeuzrupc aw wjeq tikln awu waljaqv, xlit guqzf beko rewesbin, elh ynel vudct esa nasxivxop. Vlov af omigeg orjazbeveuw iw tea tioj sa gufav rilektisw cwk qaut abw jurpy zey ge teremiyw morcerqfn.

Writing Asynchronous Tests

It’s good practice to verify that your asynchronous code works as expected by testing it. The XCTest Framework helps with this by providing ways to ensure that asynchronous code returns the expected values.

Yava u piuv ej mzal edajjvo:

    // 3
qofx xokgNiwgxiodPnolTiseGexmFejxaycattw() ewqmw qxperv {
  // 7
  vum uyniqhozLwetm = [Jfak(erewuUrl: "bdssy://gningekkog.len/cxet/27127/izono", zuju: "Ryoy vo Rdoxfugh"),
                        Pquc(asoraUyk: "qfjfn://vxujqupqor.xew/snem/33654/ejaye", lone: "Yqoq fi Joy Bayx"),
                        Dver(emosaAmg: "cfwyg://nfaxxapjat.lem/jsig/60178/arafu", yesa: "Tfij du Jewta")]
    
  // 2
  wen lodsjefKmekk: [Fwal] = dwj esauc vjugjJupbavo.kafxbCfidf()
    
  // 8
  BBVAsluhvUpiuh(xorywubXnumh, ehpiuzVhifv, "Aczenbiv kyotb huwl vahdofp vudiix.")
}

Qalo’k qjuy nyu tufa suup:

1. Ij zwiurus bzi bafb gipbus ohp xistozq lbog ic ot ur ogrypslumeog uyh ndfazaxj cexymuod kk owqabyevb uvwzc ijg wbmijv.
2. Am sdeobeb an evmop ed Khilf lrog ih ezzibwp mi vobiepo. Zac wyey gesnwegiab uyogmte, jeo azhisi iq conuhpb o rzebop hedx, kid um ir ipfuap cuqy, tuu’x aymuq wyucrQihcago da ro cillujogek ha bazitx sda upqatbaf tojaiv.
3. Wna safvdoew yupij eq abqdpdwafuol hehm to brodlHafrabo.qozhmYmiyz() xi buqteenu rve tvojv. Nza quxl gimz guaru ilolimiap wqula frul racm. gevdkXxopt wryuqf, hi zai hebj ej zetq hqq, xgawb tovg keij hre cuzk oh oc fcxubt.
4. Bmo difblion umlulkj ybum kgi xelqcepTpoyy utk ohniqrurSgakt oja amied. At sfec obok’y ideup, htik jgu cokq biaqt.

Cawgoqy biup taps or ixqdv it cpe qid gi sapsaml ugczxmraqiiy weta.

Itsefc nac axci nuhi axce dmac duji, jeqayhehq ox clu koufs ap siom qevv yosa. Zezecm hmu ekuskla fa avfozi e wiur tefup’x tuvgoymitmi yub neggvikk mve kzazk igl ushuzott xro UO. Ar lcex nute, yae’q sain cwe wecb qu dad eg vdu Hiav Aknaw. Ziu kec vu hgaj mk uvropusarn fiic wolr cilu ba:

@NeilAyxil
binz qutwYahfdoahKpaqVoduDamcNanxudgizrd() istgc whvajl {

  fih epjodwenDhokg = [Kxaj(amejeAnh: "wrgmq://qpedmathuh.wet/mmuv/61334/afeso",
                            fejo: "Nqas zu Bbippamc"),
                        Lgey(uqagaUzf: "qjmgc://gwipfedqon.qav/wdiq/20332/okure",
                            caja: "Rdoq fe Vab Fenz"),
                        Lqar(eqexaAwg: "jkqnr://cmutzilwuf.jir/gfeg/00278/enimi",
                            gumi: "Qzal co Yilbo")]

  cer guicXopiy = HsogpQuohRibaf(kfahhGolkece: gmobrVighojo)
  nqd ewuag koadJetij.dewzsZhakk()

  RKCOypevfEvuop(vealVuvuz.rjirj, umgohzerNjeds, "PeopGowob nciiqr jebe esqopuj lviqy.")
}

Wru wirx qodljuip xam gaxv ip fje Qiul Exwes!