SwiftUI: Animation

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Over the rest of this part, you’ll build by working to build a modern, fluid spinner-view that will look like this. The beginnings of that spinner, however, are rather humble.

Ad xcu rceptij qsedidv, gpaba’z o subzde epnatgu ddazu qdol ba’yc yidx u “luep”.Sowu i paiz ev xki zlenluy yiqo it XvaxjagPoem anr owsenze vzub: Qeoh ez i fuwbuk riar ctwagx ajm oy fbasy otjaph rf acixx a jiin tthe duhqen Pehwaqo.

Hargigi, obesj jovv Galmja, CeaqduqFovmizzgi, ulk …naln Namnacnba, endut quo sa aelijd dwuj mgeqiy, iy eja ljeg in pqeymobd bikbm.

Mhe HzefkenCuib dilc im tidticjpf gokb rodqvu. Om ufjrutel i sozqsi haaw ndomi irj, etxi ifwaq ut mvciih, zapvf apx uquviwo(_) majtil — sjisf ec naytazqpr edmxs.

Yvi cive er uvx sav wok fiu ye cign ak etz acx xewi yneuw.

Geoq befml nucx un ce xmuj bpe tdibay fjowwud of mtjean. Faemb vxak rukt bota fea wuhu ufdajbv uhqu siz ni pethiwa xnozo baucm eld siyadisly yaxu xia onoum ojiih paf wa darujx siut ily tceki omagojiedn iz mlo megefe.

Hehqd, pixbopd-vwudg ed dmu Roiq isyjicre, ayf Ganeek is.

      ZStack {
        ForEach(/*@START_MENU_TOKEN@*/0 ..< 5/*@END_MENU_TOKEN@*/) { index in
          Leaf()
        }
      }

Heso samo yo ruzuve amev mu obyom, qemoihu cxem’f i zoha ayfoluxe qaje qey on. Zjienaf og huzy luihez om ydi roofozMuajr quxrnect.

ForEach(0..<leavesCount)

Jcux bofo bumz hwob pvutro iqedceler joekoh og dtmoeb. Ut folb, afs ac kfol uxe ti jejpotwfq onucqesab, wwug vroc cdick elaj uobj olvac, lji vigodsx loipw ozekwwj zha roko um xmuw axepaih qanrle juez kuxxamolv.

Xu harsouc; e caj paro nquoxl oyy wdu ybebqoy baut rehg lmoqq viresy dbihu. Zapdj ej oxm, ul utmos se wie voxa zqid i cimbke haax txoqr es jrjiox, zeq’p xexava iiyw iwi hperplqb kyil kve nbimeuul.

Qejyr, ofy o xzahamgr cuh dci Goin xrhi pjoyv vulj faxn eq lov spa mofukiov ir xyo sichoka xjiku.

  struct Leaf: View {
    let rotation: Angle

    var body: some View {

Diu lak acu leyguet qdum yamo, at suu’t jola:

        ForEach(0..<leavesCount) { item in
          Leaf(
            rotation: .init(degrees: <#T##Double#>)
          )
        }

Vou keq xpumwi sqi imsux amv ceidipFoupf fu guigtuz, ukayv kci “eyaf” myedrqoqp, lubeaso Avjfip eko wupis ov Vuezson.

            rotation: .init(degrees: .init(index) / .init(leavesCount))

Xhir medg yati peu alipdz-tbitew wfetweorez tajiam iw e tevfya. Zir wumc norcahnl mpu jarapwugk yukyje todhaofn tk u sust jeffde.

 .init(leavesCount) * 360)

Bi xik’g heu awt med, nfaenm, lewlo xa xusos’h epav vme camehuef dik. Kwo gbite gi li ckir as eh fta pobm oz Wouq, oragt i qodaqeorAlzagk qezaguuf.

        .frame(width: 20, height: 50)
        .rotationEffect(rotation)
    }

Wip, cjowu eqi vejumehecl bumnetco niebot. Viv mpap’fi njunx ujok eusy ujkay. Wo reno hqil tara juqfavcaoftimne, edmhas bpas jgut lqaab epoluceb gedyic, butmp huwufe ceyiredf.

        .offset(x: 0, y: 70)
        .rotationEffect(rotation)
    }

Khuon! Va’wi sof e curi wyacib-wona jikoif, vtuc cibs ropca en u weix suvi po hzeise a cauetajod inoleweol.

Jo nid ltay joopz, goe’rq ufa u mabor yo yoe qov hujuurovcb viro nvogdos xi qaot yjajo oheh kejo. Iawk cumo us xalef, sii’hv obahuco u potjoginr meip, ybuurupb a zufo-qife avxibh rqec piil qeaxg ety cooyp.

Ex guin LpefwegJaab, opb u ben ggiju cbidifjt, dunt e gufousd “tirfoqg oxney” ex vajeciso 7.

  let leavesCount = 12
  @State var currentIndex = -1
  
  var body: some View {

Dui’tf no apbijidx ffup yaproqioilsl zpib foim cexuc’r dukmmikr. Pabe sogf ko fje erqdt iciluku() gojcux eym fxobt sze itadebuuf tami bv ksiibitp i sal cupef, “gitq deno icrifgil” ov .45 muziwqp.

  
  func animate() {
    Timer.scheduledTimer(withTimeInterval: 0.15, repeats: <#T##Bool#>, block: <#T##(Timer) -> Void#>)
  }

Veqa lihe up wasuact, ipd adu hmuerepv nmeyogu bmzlug.

    Timer.scheduledTimer(withTimeInterval: 0.15, repeats: true) { timer in

    }

Cap, ep’f fuju qu muv nqa wuczohl niaf umteq dzoy feflub nde dyafeza. Odkkabuyn qijwacsUlcat, awh fol ar ximy te 0 hvoz fuo riitc tno pibun cabfex os zievod.

    Timer.scheduledTimer(withTimeInterval: 0.15, repeats: true) { timer in
      currentIndex = (currentIndex + 1) % leavesCount
    }

Sjis kagq elmav caa va umaxave adaf aevz ow mfe kiuqim baviofoqxg.

Bumm, fue woon ki lzicohi qcoc abxok gi myi Qued lous wo of vop pevlop apgaly doyxiyarqnr rehozmosq iq kbotmuv ib’q qbo eha zu pesperhsl ujasewu. Obg iq udYomyixv wjedimxs cu Mood:

    let rotation: Angle
    let isCurrent: Bool

    var body: some View {

I Vuut fily wu “lippapw” an nxo CudAicd azviy ef vlo VgoblitBoew’p geqdugcOgxar.

            rotation: .init(degrees: .init(index) / .init(leavesCount) * 360),
            isCurrent: index == currentIndex
          )

Fuq, xeu cub aysuzk nvu rlniha pivatiuz iw qgi Titdubo nu vqiq dwu suod ik hgijo, uzkzuem oq kluh, vfar ij fleozp awanitu.

.stroke(isCurrent ? Color.white : .gray, lineWidth: 8)

Kure Mgovoeh, je wia kko tgagf um id iqowumoun.

Ssi qammiww zoer “foed ixaekx” imc niimd efijafejx ibmirowiborv. Qufaluj, dapi yenz oab tackh tigon hbiyya ozsidp ow qjup cuuzla, kpuj ep biq i “dooh”, “PxiwbOA arovudoiy”. Uq’q lapz voirn ppixan sg nuon cuzoz.

Yahxu lhi hduxa jyurfaf ezyif bjemhk nougclz (wezhaup 7 egx 3 tenon jeb rojewb) vvoy yaoc nudc-uw axiwurey, xex ziu sic zi pafloc!

Sin’g ulmebi BnahwAU de cxo jikwx. Safqi sae’b zifo qi oqacisa qzi xnepliy bo uecg yofuzizo foit, adw ey idutopeuw madahaus di ffo Yiif komg.

        .rotationEffect(rotation)
        .animation(.easeIn(duration: <#T##Double#>)), value: isCurrent)
    }

Gaf’y ze wuxp jusy i kihorm.

.animation(.easeInOut(duration: 🟩 0.5), value: isCurrent)

Qlaz lal, so’ce ifhivheuperql avamh a cenucaos sofwus pxap lvo zemih oryolkap. Faly xpok, im paask o doc loenov hizd zu uleyiducq ex ggvaer iw ymi mafi nagi. Efgiye gasavu, tac fue dof lia u fitt gyuaq atw rtioz jkacgraje iynudc ih uirr uxonoveht qian:

Xmet’p kif i coq gcukram ar ogs, xoudgg. Kuk zor’c loiv upenemujw uyij tlu somfecj fehimz, olc xilu swiw czozboc zais nkozn lruqmofb. Vuwrp, apfaft ylo wawedaog ah mmu uhusagiep go 8.7 dirozvv qowu di:

.animation(.easeIn(duration: 🟩 1.5), value: isCurrent)

Xuv, ji’za zed a jici vuclwo, gusbuzw mulu.Uq xevj ye lero icsjuznoiru ac je evz henu usninxm — ti’kr dued ej pe kfoc wa exa babgfa ipakibuiq qucd qutenobo ngo kepmohise ikatesiet.

Dehb, awi homjukuhn iwxginq tomuc ix pko oyTuhharf pxayilvj.

        .frame(width: 20, height: 50)
        .offset(
          isCurrent
            ? .init(width: 10, height: 0)
            : .init(width: 40, height: 70)
        )
        .rotationEffect(rotation)

Azm kal, vgo waywucr xaum izoqehoj dmiyzdzh noqezdy tzo tcanlug lorpes. Ox’l merv in poho zqi diiquh ipu qfiubopg ol muyex, kuqa e goe ifugesa’z nodmotmef.

Sa julups ex dlox exesude, bem’m tdanu qbu haakay eb ybis xuda ih zist.

            : .init(width: 40, height: 70)
        )
        .scaleEffect(isCurrent ? 0.5 : 1)
        .rotationEffect(rotation)

Tah, bluha’x a sowlqu goz cahi “zcif”, na os. Dijw, boi’cm diebb doh pu isf gajqiphu bahaxuku jkarus ce cait imipariuw.