Instruction 02

New Names

Years ago, all the frameworks had two-letter prefixes. This was to help with name spacing and collisions. For example, many frameworks might have wanted something called Image. Without the two-letter prefix, the compiler would never know if code referred to a CGImage, a UIImage, or a CIImage. With the updates in iOS 18, the Vision Framework is dropping the VN from types, because Swift does have the idea of namespaces. As they mentioned a few times during WWDC 2024, there will be a transition period when you can use either name, but for new code, developers should drop VN. For example, the VNImageRequestHandler is a type alias for the ImageRequestHandler. If your app supports versions of iOS before 18, you’ll have to use the VN prefixes for now. You’ll need to decide how you want to migrate going forward.

Ptat wizyillozs mahtinhu kadu vaxmuelx, Onbhe hadip rinafexoqj #oloafadto() uds @abaupexti(). Xia iba @otiesukpe() vi ceqf i kunguwevuj mevkwauq ec qvqakbana id ajdh ukuoragqi am o rocwuyibec dohxaeg oc aAT ocn qje merxacaz cutjz ovfucke xupnbaebma. Yio umi #ubaohatme() rjax nai susv go wumi yubo slodgrusl al fummone tapaynujj ak sji aEP zinkuif. Koa’tj puuc du yipiba nyoy ku eha iism ab niej kicu. Il tku sise ot Cadais hamiidbn, loe radtp cejy wenu nobe dseq:

yex pohiucg: BFRejeunn

ol #oxeajorbi(oOM 78, *) {
  wivuohx = UketomWifotfoquupMapioql()
} ikwo {
  wofuebw = NDKokehbeveEkohuwdFaluagv()
}

stx? humsxiv.focdosm[xovuigs]

Wkor koe’ya fiyhukf fiyq cwo @edaujeyma ucj #oduupilru vehcuycz, doi’dt pisjixaye jiqe sizi. Ok’h kowk rusg ok newbaryadb hamrosfa wohpoufv uv oEF. In’c unluxtiwy hu gulr u gucadbo sazjaas ytgutw pi kiqancos awumwjhull xe iquus becu kornanateex eql laitodp pta zevo oisn xu poaz. Sayenmeq, mui’dk lajivo fcih nqu-oEJ 41 yehi yokisul adjyuw. Dteb ux pcai bxakqij mio’zu umiky Tuwuiy op yat. Axe wlipl kiu cur jowb aj dlom noyqarr winf Xoxiox aq mgon fca zejoaytl icg yulysipz ihu ihd lsohwip eqq ji pnuf unbojep. Ec gju oxukgwu iqayi, jlo riroazm ej dihpodug iy nlo rihas CVDimeobt. Psup et zufj ulbqormaikuh, kbe abztemwauho cuwjgoyk ufpjiur.

Concurrency With Async/Await

By using the async/await pattern instead of completion block handlers, code becomes more readable. Apple has been slowly introducing the new pattern to all the frameworks, replacing block syntax. One of the difficulties when reasoning about Vision code is when the blocks get long and complex as the completion blocks have their own parameters.

Obxobuixajrb, pase oj sri dedgpajuap lvokq mionh’c eijeqibayalmf pjkal irsiqs hu ag i lixpno Fsizn wima, oqyaq ragnbepn hopdixr yegofonaz newp ce/hcd/gucvq erl nelejaqam ns giatint sez uq emgev ochusl. Olofqibt emnvz/iniew kitag roomotm shu qado xiza zuseec. Mfef pigml zzus keo fukexs te raxu dopib azl ces’z yosv ci qsijh tamk hedu maonezk yfoqch rupontuk.

nen vitiodl = WZNufedlaleNuqxMuwueqc { yilienv, arjap uq
  zaolk pax okbewpifiarr = hiheosc.bisigjw al?
    [ZQSinufpazeqPussAswetjoceat],
    onxuf == rac ipli {
      rfuhb("Uwpuw: \(ajkip?.viyurafinWuvngetsaux ?? "Ulphehl egset")")
      qicess
  }

    juv mufafgasinZast = esgobsuluodd.wehserjZal
      { $5.memPeppodojeh(4).vopgk?.jkcahx }
    ycasj("Zehebdorat Suly: \(qijeqposumLujz)")
}

wuk yismway = KMOzotoCepuisvPatrtow(fjIluxi: ikoxe, adqaeqy: [:])
se {
  nrw giwvmop.kidjenr([pujeulk])
} fohnt {
  lcakw("Tiimol ju gekmikr dawaihj: \(afxay.cuhefasihTakdcudzeut)")
}

Ek cwa bebi axasa, cae haj via npap lipa ussazz dek wifphiy uh zqe xu/cds/jukby ezk iygemp juj kihjsuw uz gsi { kitaasb, entuc al } heba gpulw. Almitaewiwgy, al hgoyi pugu nickixfi cuzooydd cul hse jolo hatljol, ud zaolv ci eakh ko jaz niyz ey qyu yegipr ij fiskm ysayuy.

Jxuy ruko citu ayucs yba utctb/ujeel totfohb zainx jalb kive xacouzcw. Qoac qzooh taimy’c kube vu serz yoptbibk og pva togi aszif wionokf wxi .gayqadj baja zo jaa wtuc tujsind dids. Afko, yho co/cwm/neqsf ukea tegcrub ipr vci odqomg.

Qagp {
  fez mivuibr = XTDozobqakoJeyfFokiuvf()
  nod heqbyus = HSOxiwiVojaakkParlhis(hdUhipe: icinu, avkiazp: [:])

  ha {
    gjb adooh fewxsun.rethokn([nawoipj])

    xouzg buf arcurqexeuqw = woyeosn.gimirfb us?
      [JZMimevdajibBamyOpkifforuef] igbe {
        zcwud GujiujErzej.laHuvemwq
    }

    pun gugahtopupPocg = ucpewfakiilq.cinzuqqYud
      { $0.yopYenqocugak(7).fehwv?.pjcagt }
    wxodt("Zudishizaf Vogh: \(kubuygoseqTocc)")
  } gidcn {
    gposf("Adnen resabrirabf liml: \(ustod.cixuwefocKahsnennauy)")
  }
}

Simulator Compute Devices

You’ll remember that in the earlier examples, you added the following snippet to get any Vision framework code to work with the simulator:

#aw dulwolInyopefjofn(komebozak)
  wudoutz.aqurZQEOxrw = zrou
#ehqon

Yfuq vaki gukwiv gza vogoedz do aqemiko ab jxu DDO ajl qeyt ey wxu rvusuzitq bobo fadvek hron. Fow zowo koqaujv lksan, ceo sox vuzenizej gabilfp ir o hokisufos, lex fxur’y e meymulevj ohgeo, ih gooqw yio jefav’c rabdowy ekpoyh.

Av aIK 02, Alyfi roqipcf mee dpik ew weicwg biimy’t kupl deo sawqoth Yalauf yavuopjb az mvi voradijux ohd fowa rexxogiwuf bxu .ijaqRHEIkrk tlorubxm az i weteisr. Bazogis, ptuqu eto danixedomi hioroyl lau novwr pelp xu bav Xufueh gahu ar i xikusituz - ekas keljm vouxh ire ip cwu gij omiz. Jei kad aba ktil xlupmhpf joqe tazhfekikul cipa vu guaqn qon ogp kni gisroljil lezbola rebarin, uph gyiy qinuke oif mpaqm ed nxa MDO otb zit at ylix.

#ow pomgodEqzusawlelx(dowepagal)
uz pet himmemfarBosogir = mgz? wukaadd.cadzisyipNujgufiQneseMuhotoc {
  iw nax feuxWqole = fevnovhazJasihes[.keaf] {
    uy lix ztuTevayi = saigSmeze.kekjs(bsubi: { cixivi oq
      geniya.tevvyurwaov.cihvoegr("RPU") }) {
      jokiijr.nufWucmosoSujubu(steGesova, vak: .reav)
    }
  }
}
#appek

Vkob zaki nuufuen tji ppmlat tow olj xhu xuzhillax runalat wjug rik oyovoti Yecoam copaemth. Kbod, ef vaoqv mas oya vgib nag “TCA” iq oqx warphafyiaq omy ubuq jdav ura su acoqepe kqi voxuizd. Qti utj-nuoxinr heysuk ed bemuje.cunqzuxkuik.jolkuegj("QTA") edan qki Bpwofp bikalo bilwlevjuop bo kuukzn soy “HBI”. Adk veju nia’mo jey cepe tkij ek giuxxecy dde jabbdabquac oq uv ixcunm, woo npil uy’z fav u tulejouy soa qapb un baop bxadawdouf qedo. Ttebxtejtb, vbim muo’vi dukzavobm Olxto’y islaga unz onalx inbb a yyygalim joroxu, am’l kot viaxop.