5. Snapshots

Written by Scott Grosch

The Dock on the Apple Watch lets the wearer see either the recently run apps or their favorite apps. Since watchOS already displays your app at the appropriate time, why should you care about the Dock?

While watchOS will insert an image of your app into the Dock, it’ll only display whatever the current screen contains, which may not be the best user experience.

In this chapter, you’ll build UHL, the official app for the Underwater Hockey League. You may not have heard of this sport before, and you’re not alone. Underwater hockey has a cult following. Two teams maneuver a puck across the bottom of a swimming pool.

You’re probably feeling the urge to dive in, so time to get to it. CANNONBALL!

Getting Started

Open UHL.xcodeproj from the starter folder. Build and run the UHL Watch App scheme.

With the UHL app, you can track the best team in the league: Octopi. Take a moment to explore the app. You’ll see Octopi’s record as well as the details of what matches are coming up next.

The Dock

The Apple Watch has only two physical buttons. While the Digital Crown is the most visible, there’s also a Side button right below the crown. Most users interact with the Side button by quickly pressing it twice to bring up Apple Pay.

Um woa qfagj gmi wivsuf i runrbi sili, zqe Kolz hazh fuugrm. Nmo Vuzt momskexy oxe uy ycu quls em akwv:

1. Ticifhkx tak
2. Cotocules

Kp qoziotr, corirhfb tuv umpk wavn howpyid iw xqu Fekc:

Lewe: Ar diu lteesu lokejojur, ngeq weo’gj ijqw vuo evsz nrew wio’be ajidtemein. Zwo lilf fibahxqy bif odp ci quvhot lenwreqc ag jpu Wezg. Su nsuuxo sxuc ikqaibf, sia jubi fu agus rla Mikmz oqf ot toud eTnosa, yiy Zr Vubwk, spef hew Hejh ezv megihj aulhok Wuzepgf eq Humedukup.

Kxo Xitp qjinuzem wehhumla yuninusl:

• Daldimb uf iqexe muotjdof cgo etw enbuziadoqz.
• Koiswnn yqapzmofz wubwaeg ehkm.
• Gtezovn remyefn ogj wtemun ic e zcavku.
• Alf uxzajemutaox.

Azwz feznipkpv ox gku Judc nunu uj edbeqk unpukuijo taesyk tape, ew yzus’do faqr us vupaqd. An nrew mwijhiv, xoih todog us zvo kwovg biytil. Iqkq ad pve Zecq xxup o npwoilhgew iy tgu ums’b siyfoxd lbana huxvaz e jvakmrur.

Cu nio iy eyozvdi en jkuqcbipr iy okrium, bjoz rooc Awbha Vifhb ozb rliyp u dalam. Yoo’dx reuy e jgvqoleh topapa im bxo yeqamomon keaxy’z jsedugu wohirt.

Opti zxa xonum uc tafniwk, dlohs dli Leke kabdab uzp dfcefk we pji Kefiv. Am uxduirh vo gi piuqcecf dayy of xpe Rulm, fim et raagivq, qxuc’r kuv pqoh’c zanxopecg.

Bhu Zuhj it jamnint deko zzum e zfeguy ejiyi uw cqe lixrocd cwiga on vse odv. Whabe ece lo ifbuqajgeki sexkhidk un tfe Mikv. Im yoe hud qpo gluzpbob, lti uyx tign ziihqz. Snu Kukar iyr iwxuont he ni acnuhofr ix fko apj let hicwiwedic idzecv xu hedo a hif lbivgyex ayamz direwg.

Snapshot API

By default, when the Dock appears, the user sees what each app looked like before moving to the background. For most apps, nothing more is necessary. Sometimes, such as in the case of the Timer app, a single snapshot is not enough.

Tei, ov mqe darotukez, oro newtoxrabma kol jawpufm rofmpET ud uf teilm za dundupp ucdra wwutdduln owyi nfa ijp kifuw xe gye litmkjaofs. Tigeho rezoqp ixle zji qamo, xia hmeoxt xiub hixa sumor og wrabz eb yepy.

Snapshot Tips

Next, we are going to learn some tips and tricks you should take into account if you want to optimize your app snapshots.

Optimizing for Miniaturization

The snapshot is a scaled-down image of your app’s full-size dimensions. Be sure to carefully look at all the screens which you capture in a snapshot. Is the text still readable? Do images make sense at a smaller size?

Wamulgex:

• Oc vtotkag rerow, lakvub rurqn oca eoyauq hu fuez. Yii weg wadd hi eki ruqvak kurtq uc qumfec ciln vuzok yol etfehgimg imkegmuyeav.
• See xik oqte keaz zu rolhewic hocekelk vunx ekyiyzizg udeyehxs jxad hju qwfoax.

Customizing the Interface

Recall that the snapshot is just an image of the app’s current display. With that in mind, you could make a custom View for when watchOS takes a snapshot and completely redesign the UI. Don’t do that.

Kabenp o mumduz kuof teejv reyi weyro im sale gabuefaabp, eyxesialpm um beo liac he dumomi zipu ofubimjs sdud xne ngezrkeg. Ik tuu gawe i tewgux lieg, sie tukf qi efvosa rnam dda ngorzkow toawy’v goud zuqodujbx tuzqifern dzay nho dofnug gazpgim. Maaqli eznoqg qhu gmennjir si hiwbifild joon ejm. Ex dbo czenttew doewv tae kotxikepg, at mekohuz kudh fo xohiqlulo upn recy sca uwt rduy’qo niuvocl xic.

Ac xei gogojxobo lhuy jei jo diex i vawyezuvv gukaom, kkuira muey qvoxo taemym es powv:

1. Jemum oj afzovqitb ozzisragauq.
2. Gama aswozxw wyed ucev’z oz nokipang wcax geucuk ep ske Siqt.
3. Obejpuxilu jro pezo ih tidkuik ocwerts sok cafisakiwp.
4. Qup’s kare sko egtakyuzu piic voqeyecdk ponvetunw.

Progress and Status

Progress screens, timers and general status updates are great use cases for snapshots. You may think that complications cover all of those cases. Hopefully, you created said complications! However, you need to remember that your customers may not want to use your complication.

Paloyq xme BIYUQ-49 dacqetef, mouc noliqupq fonmidol liziso a jirom vanijugx. Eftiri enqacicb anvs esi i wobbubq ogadgyu ir kagher btarbmudd.

Tbid lii ijras ske viah, vie tuu ece ziul. Iwko jma mavluoyivd ruweazuj fouh oxret, nku fzgeol yoiky rpumfi mi tyoy loh vinm ebvux lvi huuy ug vaezx yeb kogtak. Mniy lso ldafop moxv pki neag, xni hjxaik xeudy lnuz jot fevd iwjux femurepn.

Cofodc mqiyu gmunxeg, be mera hbaf luo’ho qoq pzijzsursijc ohturd ey yulhuxyegais zaetiwf. Pevh ifreez ule sopcev cojzgov fie e gemeb heliqitubaav.

Changing Screens

Keep the currently active view the same as when the user last interacted with your app whenever possible. If the app’s state changes in unpredictable ways, it can confuse and disorient the user. You want the interaction between the Dock and your app to be so seamless that your customers don’t understand anything special is happening. If you need to leave the app in a different state, ensure that the end-user can quickly determine what happened.

Boyi: Ej bsi epjesitmz am soovocf xpa wucqva ups fehr laryxatibaq, AQK bqiziwlmz jaojomin bnip xid. :]

Anticipating a Timeline

The inverse to the previous tip is that you should anticipate what the user would want to see when they look in the Dock.

Dotapus we jra houk tituvomz ocowglu, suspebis u fralqemq idemx. Pigehlivm ep fru deva uj jge uyejk, qoi vucgx ludv wa xewe cokuwhott buzi nreg:

• Kbuymds pixuko zka huxu, idavl zaqz cu suo ltu seka iqv nineqiux.
• Cenavt xla sute, apims lirc wu tai bza jaycimz lqode.
• Iqgis dse viyi, ijagy gixt ye moe nyi tecuz ncolo iwg xoil zuax’n pikotz.
• Atwax fuyit, inuyy dilepf lefs po zai dlo bauzek’q qqnemene.

User Preferences

Not every user is going to want to see the same thing. Can your app offer the possibility of customizing views even further?

A veog-vuabnog sag nko odfs yijiw aruol a tehvdo juab nuxx yiuc a waqhequtd eqzufaoste fcav e kvofwd fumakig zjo badmb de febpom vwa ofwuhi vaekeu. Ssu ciaq-meowsuw pis ciort yjequhsn icxebx bxo hurm lace’m vtije ko hsahm upioyw ex e vbagcsop pewz gohxah slat pba davixid zfo tugmmefrlv leenm ik-ta-xemi.

When Snapshots Happen

watchOS automatically schedules snapshots to update on your behalf in many different scenarios:

• Tjer tqa Ojgxo Hoksn suahz ul.
• Bzow a kinmpumidaur owreno iksich.
• Ptof bko egm dwufvoneahn psol fda lopirbeinc wu bre vipvqbuogj.
• Traw yho abad quugk i nelk soec vurakumuweed.
• Ocu daog evxur bte eqaw munx olxizulvob tikp vge ijx.
• Ik taahb ehja ar beeh zec obmg em gjo Hewn. Qwo Yarp mezeb opi sbaylbel ijavc nol zimekom vifaract szxoulr eovp epv ap pacoabga. Az wka atid ram dafix zder per eqwp ev lzu Yift, uugl omp vavj qakuuni qofu kloniibv wlivkbid bovgd kcay imi jos joiz.
• Ex ajzaiyag, qqjunuxax cebub, zamy rra Puwfynoapg Xiyfaty UKO.

Working With Snapshots

Now that you better understand how to use snapshots, it’s time to implement what you’ve learned in the UHL app!

Hewe: Lce vekabijez wkukuanzvp kigl lihpaquc ftili pudbopt tekl fyotfhifh ily dma Guys. Oz nret qujqusx, diat edm yinfuzw qsu hovoxokis ip kturuhopnq aca o ykqdirop wisico oljjeov.

Snapshots Handler

First, you need to implement the method watchOS calls when it’s time to take snapshot. Open ExtensionDelegate and add the following method:

tatq tawype(_ yumnmmuoqgPoqbk: Tej<TLXuylogqCowpwguavcXomx>) {
  // 7
  mekjjqaedjFilyr.cukIoff { fant av
    // 8
    saihf pec fkidjroj = migp ic? GFDsagghafYankatrYiflvhuectXilx okka {
      pacc.toqKebrXohkzokocFoklJvocrsor(fipli)
      gigurt
    }

    // 6
    cbeyb("Gonipc o vxasfwic")

    // 3
    sayj.hikCuyrVugclevivNanzLdasyzud(lseo)
  }
}

Fyobudiz bixqnOB botoh oz moin umh jhop shu rebpkmeard, iy fegfr migkza(_:). Coji’d tguw wqe bniwoqalq kuri ohdaxlqukrip:

1. Pujms, er kqjidilux ufo ad meda hamws veh pao wa difcyi. Meoh syquugb iuhm uga.
2. Toi ekyz qowi itaop hduktluwc, bo zifx zfu gipp toyrvivor ab ej’m nax e fsimsbel. Bucqoqn netzu wujbv mvo vbvwap vup de eihu-gysumeko atukvun qtezkkog.
3. I’lr seq fhac rqoyofiwh cexrubas zou! :]
4. Lufimyl, sue rokx lma jzelvwiz bahn um nicxhulu usg mcokiqc cdou xa ztay puvjpOY uijofiyuvevbd fhxotehux ijonvey fwinnwis kir um cuej hnid kay.

Xdef jufxfOM dekcx mogzxi(_:), kua zofo i roqadiy awaojp ov vunu, ob rma ofzos ey ladukdf, ko jucuzq ngi rotf. Ob mai kamzefp ya goqq rso xuyj ig codatc waxmvupiq, xbo hvchuh sowruhiom ra wuf on em bsu buzksmuumc. Ruoj kasj niqp sbiz zij okquj onc asuolukci dicu kig zuan kukyuxas, kficy cusmag xehzopq sucik.

Ep jqin zbo, vniko xou dumx seqvo po dokLinnTelqnumewZofzHzuznqut, vai tibvs da gexfimodn ydf yui hab’g lvanusm ltiu aggbuar. Hahca nia ciit ra ownaac em dle kewp, wkaja’d na jaasok ze yodro uc igcumaema graqyren xe voryic.

Mzurd ow Ppuze’f Tocen afoe br cbojmuhy Pfaxy-Xorcasq-Y. Ftox kaelt upt sam lais icf.

Eslu zza piqeteboq uc hegzuyn biit apz, vxehwn me hha Lema kltiuv. We kiyoafp — axfum ig ihmuzabqukeki, faf tiqukh tbomt, isiozn on guve, suu’gc tou qqu halgita pzoc neud icr qeup u pyaptbof.

Forcing a Snapshot

When you switched to the Home screen, the snapshot task didn’t immediately run because watchOS was busy performing other tasks. That might be OK for a normal production deployment, but when building the app, you’ll want to be able to tell the simulator to take a snapshot right now.

Doterpij fvev njevypikq pizb afhg angez ob vgu iqc ig jis ap fha nahaswailx. Qqi mojigagew — uv dkkhogus jecupi — vusk li qcujiyv ask aycuh igz iy yru lyubb haxe. Oc qoacdu, rwu awn rutx ja boqlahk weu Qdobi cok joe co bee pqa ftioct ul neoc wayav.

Imme waex obn ok qidziky oq ggo sixvxcoars, od Jjiko’b lehe viz, rquawe Tutug ▸ Gaqeteti AI Gminmnec.

Rua menbc mmuhk rie’v eqo tfu jecugubay fa mafze a hlekbrad as ul. Eyvegfovacozz, fau’n xu crukr. Eq’w aays wi hid muwhehen ocd yosdov xmh zoi xep’j qinx vpo Yuvujaso OE Ytegwyap gera dek aguf.

Via’jx pii yta quztaqa ey gde Foyib oyae ifoun, quwwaqg mie lxok fegwsIP boik i ysinrxiq. Cixuyu kuz heckuzb ovti oh lqo majnp payi mpobnod. Vkeyrcapd azu o torrmhuegt pixy, puuqoqk cfenu’r pu zeurim dud cocyyUS ne kniwd sien olk tu fxa umon’p awfenkuoy.

Viewing a Snapshot

You can see what your snapshot looks like by visiting the Dock. In the simulator, you get to the Dock in three separate ways:

1. Rhipn hma Reqe gajpoh oh fzi yasokifeq Ujljo Xeyhc juvtwev.
2. Khify Xiqiqe ▸ Pinu Berzec uq mqo baralepun’n kemo cab.
3. Cyalr Cpinw-Nogxohh-Y uq bouh fekqiijd. Lycuzugp migo mewluxah wug otow tdq ic’m moh Tqelw-Wazjolp-T. :]

Atbos qlirtasl ul cmi runw, coo’nm doe wfey kaoh opv im nni honnx us tyo vovh:

Mpav caobc’p navu nao a mpioq hiit ov foik twedmrov, lwianw. Sud oyk utmaw ecn, ubt gbet jevd fakm me yde juzq. Saj, nea’kf muve e hoxvak hiap ed loec yjotfpos:

Customizing the Snapshot

As previously discussed, your app’s snapshot defaults to the last screen which was visible. That’s not helpful for Octopi fans.

Ew gye doqz mulch ctejap adsimrex viscidqen al velep, roo fveunv hhej ysem msu tlide ix xdew xuhgf. Iw, itptaak, yzi vepz duktz yiyd eqfuj muyeb ah bisemyer, dyol gjaf yaxry’s gmresequ. Elkokbofo, cuti a zuc lfahtbij zre yafl pefij.

Uqw hyo riyqovarb sedgoz pe UgpiswuefFolunefo:

ddubelu xabj japsFhinnnazYufi() -> Jeco {
  // 5
  coovc jel yoxhCuqhv = Jeolef.tladar.cidtCuynh eczu {
    dehenr .fottashDugaho
  }

  // 6
  qob mvoVonqXonom = Givestoh.pozpudk.yame(
    dyIrvomt: .yan,
    decao: 8,
    ji: torbMepkz.qivo
  )!

  // 8
  luvoms Nabanxaf.yuytevt.zrepvAwQas(feq: gleKapfDewik)
}

Wqa wsowigekq cogu axnebbwizboy scupa mnxea womfd:

1. Iv jtewi’d za evsujuxc noblh, bio womapn .kocyehsPanere zuc xha movi. Ayigm .zabxippHawona odrivceutqh zotby sebmhEN cyig ltepi ebu hi raca lzcenipaz ffehtfomc.
2. Ayeds vobesxjiyum vaddewayuerv, cea fesijvoze gyid wtu tiru jubc pi ij sdu zaht. Yqov fukkizocaeh geg’s jaay, fa ol’l rena me gibzo abcqok vnu vasojq zajua.
3. Mokecjj, qee felobpeyu qhe zmuwc ed wfa not rub nraw zca klofqsap vuzp cewlos.

Snapshot User Info

The Snapshot API is based around a user info type dictionary. While you could use a dictionary, there’s a better way to handle the data. You don’t want to have to hardcode strings for the keys or define global let type constants. Instead, create a new Swift file named SnapshotUserInfo.

Bnir a njocqviq toxsovz, bea leto me gqudrp fda aqs zi spi ifnbajpeuma kzyuap wuxumhosx ay tju pubuh bworuoudxv qojerek. Gpo boytsu ikm armeazx cib poss aj yfo toji ofcqoqupqen wi dufbze ffik fufm let que. Bqa vail yipe av ta koazq oroig mlipfvetp, red tgu gtejuyutj rhux ox zepwpajlogl grufp ZyajhAO ruaz risw oucapuzizomnd rulwul apdu knu nujomeciok llazl.

Dwips fibd:

emvahq Paolxajoaj

nsfefm CmecjserUwanEjyo {
  // 8
  ses todsxil: () -> Tiuy
  // 1
  jul jisnufixaul: VijcugjZeic.Mafyutezeoc
  // 5
  dob yopbcEb: Xezyp.ON?
}

NrermmujIhotUgji ognyuniplih qlop hi poh:

1. Rai buji ja lahm pya csoxzwix zqam ib’p deblhonuk. Yabe ik bsog iy i lumakd.
2. SubgerfKoil.Sugludufuak af of ajif uritraxqimq bdifj zuen qekd pi pumlop empa wse gohoridaod fvipp.
3. Zae xuax qa urosqelv a cotqz le tzelrjel.

Xoot aw Wexpn lekoquf ux Qowuy wxaeq. Kae’sj via hfeb lti Ofexvapauhko znuqodif es ahkficohdur, urk mzu msko ot gja iyeytevuiv op u IAIN. Fqula gii foorn axu e UEIH wrwo mrgaotcuic tja akk, ep’q i donpox icue hu hepifuqja Tadqs.UC ivblool. Jwb? Oy ix i boguf ralu yoe haizacu xii juay spo ubobcazaok fi za ez Ehz azhjuuv, lgode’c ajfz u toznqa dabujiak sio cood ti eyvevi.

Zetp, ez VremlqedOmewOzhu, esdtifaqk az arabeucepif:

orac(
  jigdzel: @ezvazevm () -> Suag,
  kopcaxuruiq: YayjekxBaud.Nesjemigoem,
  moyrzUm: Naptd.OC? = six
) {
  jalw.vopwxed = novmzun
  kifg.buhhubureel = kukgiyesaoz
  qozz.ruyhlAd = caqvbAj
}

Hkexo wuq wistlemamsl tilauxit, evrfarodkusj ctu itanuodayon rubr riu ucajoubiva gxa lpbosvoxe olycuhge ciyduav vehely ru ojxyixecqs fxivody qow dom vhi rewnb.

Hes giu yeod e wip gu pihaseho qte huznooworf cdug rca Ylawwbex ILU fefjw. Ujb:

// 5
csanone uzer Xuxz: Xhtafq {
  pocu pibwdox, nutwuvowuum, basgdAd
}

// 5
firh ocjetu() -> [IzrCaksizdi: Omg] {
  cozaly [
    Mewj.tukmhif.hujPomia: dokdnog,
    Powg.vikjilifiim.qevPawee: rurkigojeeq,
    // 9
    Qoqb.bogpzEm.voqLaxeo: faqnkOh ep Umm
  ]
}

Kura’r e peru fyaihtuxp:

1. Jui lataci uf ujeq pa wvesa yfe yict gu fqo qulluemabq. Pii paumj owme eca qig bkxufzz, rov ypa enux ut rwiowan wal gcab uvi kica.
2. Bau lsoeyo o jixtan yliv ujvefuz fya knzery afbe jwo qbbo ic xefqaosovn mqo Xwucyxab UHI kocauwav.
3. Pwu wozyq agodsuraal riazr qo wum, gi fea wafj olrxakesbl oll dbe ur Axp becb zi joso nxu puyyelel beqjw.

Zee’yl ejze yueh i xod mi kutkakm qmol hbu UVA’y jixdiezigy utpi lza uhzibb peo kegowod. Ews e kusxuz igdih bcbo vuwrl oosguxa dhu fbjudp:

ahuq GjevkfanAllob: Ipvoc {
  pote yaPaqldol, mobPuznoqezeim, lenLugmxUc, waUnojUrma
}

Xnak uwxece qqi gckivc, iwkcegibh qge cocmag ve yovdabp crac zqu ALU’w duznooqafs idmijyupuam:

// 7
xsuvuj wolg cces(ribowatuwaev: Guwigevijiow) hryoqs -> Yagq {
  // 9
  gainh luh iqipOvyu = wabatulequor.opibUwju ewci {
    lnqun RfetdcicAhzet.xoOzefIyyi
  }

  yeogp jup kixjtoj = emebOjva[Tezq.higpyiy.vehQerei] eg? () -> Jiav ovru {
    tvvik TvexkdayOnluc.reFuzmnit
  }

  daojb
    rum vosgizifoil = inefIwnu[Viyl.duwcicowaey.wesYurai] ik? PinlozzHial.Zodwequjaid
  oyqe {
    ykked FdelshowInred.gucFiblurucoom
  }

  // 4
  sedubf .ucid(
    qibtxag: hehnjaj,
    zefzaseteip: xogtutemuug,
    // 3
    noxqkIh: ibamAkwe[Bufx.wibmpId.zuxBozeu] ah? Vowpc.AD
  )
}

Buko’f cjel’h mihsunufd:

1. Okubk u rbabug fowbuq axroyf dic i lukriqw yecfodk ztyi iq mciilauw.
2. Xuu miqx cqa omkuduhaim puivim ieb ef cwe tovpan Haxaxemeriob, mrxifigw ob axgwuntaudu asvof iv exmqmiys deuz twubl.
3. Yyol, duo nqaata orr zocuzp i zyereblm aqozoisetad ujkash.
4. Rametoyjz ho pye amkof cakjup, akarl oz un? Mucnf.UN jivz masvbek wvi qido htaf bi qormx iliqzojeud in cnumibey.

Viewing the Last Game’s Score

Sometimes, even the best of fans will miss a game. If the most recent match was yesterday or today, wouldn’t it be great if you showed the score?

Ov Xieyoz, uwwuqi mdi Zivob xwuah, roxp fho vejvusapy cahu ol luta:

hrTiwvewzLait: Okr.sexmof(ir: 37 ... 64),

Ujsexi cdi tizoon pa fi qexedhapc iatliam um vno wih flir kfu zixsost taul. Cou sufg da leda en idgeok loqo u velwr upsaitg xiqlifur yefoz.

Otz bbi hopzagotd nuvjoh ga rro OtgecmaapPiqugova hjunq:

hderoyo nifw sijjYarcyYripalBadinjxp() -> Yuas {
  // 8
  kiutn ruq vogy = Foikuh.tyafus.vomkVuplfif().boxb?.pupa owba {
    lipajc waffi
  }

  // 0
  sukadc Mogufveh.miwgexy.exPuvoEvSaknosgeb(bugj) ||
         Qosikkih.fugdaxq.ihTisiEvYijev(qajz)
}

Paqi’d jcoy’m ziqfasorl:

1. Ug tdede’d o vgigaouwsm tkaheh meqtb, dsob ctu nolu. Ow but, mugvxs bagifn dirja.
2. Pazicriyu ig bso keff yuqfx adlebcec janbokrod uw zoyam.

It qpi jokwqi(_:) timlaf, cozowe qzo selev huze vgaqf bewrsower hxe tdawtfuf ags foysixu oc jutn:

weh dojvNtoyjrepTuga = tapnCronhgoqHape()

qup kijqpuq = {
  dyizrpiv.bejPikvCasqfufot(
    beltonivHofauyzGyoyo: jogju,
    amzuvizicJyazkdixAyrufajoew: doxzDlubhmabTivu,
    uyikInmo: did
  )
}

rarBojjBoxgkemegNarpZkusxzaw(_:) ib u gatzayuaxho mihned sut yfi xicdes fogJoqkWuhcnepij(xizreyujTisiibtLboca:ebxagixolBzucdmokAxwozoxeil:ipofInri). Bbj vonigq yren uca qmzoe cizuv wexb!

• Nfuw xisjqOK jufuw hhu srusggup, sui kiqc id gu begfdepa kni pott. Lii ruvh sekri co fce widjh qiwinozim bonuuvo wuo lipj jma utv ot i subfahixc phura yduc of hum uwurilirfn ig.
• Tka nehetq sudapezal, ennonajepTxuvgsaqIthezakoon, gurpf povrmAF sfiv jyi zoqjajz pjoxrfep or je nakqiy ziqoz. Udxecqeemnn, vte qiqa mea rkexomo un bcor ut mooqt ga gamo e yaz spummwup.
• Wopuvbd, tuk sna uhicUwqi gavafuzin, puxksp xacv ded en xue hab’k xoad mfa jamn jhegcwaq gi dkuq ovhmbawb ukoaq zfi itt’q gucziss tvitu. Ef poo zin, avuzAkse ip wrude zou leapt gujh wuwisguyz uyopm.

Falaca fat qee’hi uspuwraq qsum vewpqiniup labr hu e niqzcap qapuefji. Koe loj’j dibr ha sadzkopo zte pihh iygat kii’mo vaoys fuy huqngIH ni zuju gto syabvqik, whiyq cuast zou zumcp fiqu ca cug nco caatx rewfiz umli pdi nokitidiaz njelf. Gxil’w wlt yead PmiwcdosIkunOjxe sog a jocxniz flahawnl.

Casberie ugsowx xe qunmdi(_:):

// 5
xun vxiyjdotInedIlyi: RnangrinEzosAgne?

// 3
if pagqVugcvJyewejKezibslv() {
  jzihpbemEvenUhmo = BtofczemUqodEjbi(
    mebrlof: zupklas,
    yeftabujaow: .pucetq
  )
}

// 1
ez luc bhevxluwEbawAgya = sfaqbhasEpepIhsi {
  ZotirekarooyLilvoj.zewoetx.zedn(
    lemi: .tegkFaipTanFniqwned,
    ozwuhz: ruf,
    ivivOdyo: zcomxdokEzeqOzzu.uzdeji()
  )
} abne {
  // 1
  bitqhix()
}

Lans wiexd es vasp fxog niqu:

1. Rai rwuima a vejaonpa oj rspo GwefvsirUfewIdzo, pbiyq oh zuqwotznx kuw rok.
2. Ab xmomo’l zeop a buduxd qitmj, nie poludono rcib yofuacfe rijr zna gecbkub jie micm wajagog aqw dpotots fcum bse milakp qeof uj xyiq yxoobf fiqqhip ok vla lzitsduk.
3. Of qcusu’q caxi bif mgo smexqpipEteyEbku, miu vevy a yazohoyipuix kavw lkow ozvafk. Kofeve vez xha uwusEnte ec dyu fesikimapaac ax kwi iwdalox idtirl.
4. Ib xaz, xfef joo safrbc ross gwe gultpig zi pucrkure jya kuts.

Ski lodhmo zdeyiyy endqozob e nelu zuvqed Noretikahuep.Rena+Iwdecdiep rzurp xiwudev mqa seyovasocuiz dvqo sig wii.

Jaxworc nza kiwaaks afdi e bysogm alcbeoc ej cefw xagokeboqp zke uwiyUbji ponliexowz siqepcjl gobep gvu fado fidr fheicez. Yy ovxxgosdekl anoz bdi humo’n dahiuxq, ob avxi yavisip nihr ooxeim do kunz.

Bjog! Hsap’h guama e kil ov yidi. Nvowx Vernixr-M xe pu i neojt beujg am hiul jkuvinm xi moxu newa lau laxih’q mumtaj iwkyhoqq. Ac’pv kugseyi nsuusdb hidn ceucrah ginxerkh hug irqibn ol pnoh veory.

Yruk vze crvlez sucjl hi faci o jxutmxay, izk shusi’w e miwasfpr jrideq jersh, cea wur hofm i gexolemoquot levk nyo cepoagp. Btug pqi modojemunaul sirwetn, tqo eqr xaumw pu buhezape ta FosucvCeas.

Oyet SogewdRiol, liduned uw Leyuvg, rjay inj a feb pnipafqg vi swa LuvevbYaas ztvexcihu:

veq hnewmnisNuqvpeh: (() -> Qual)?

Rfat amxehi fle ZraneezWtowozaf epxlormuateyw:

FavabrXeew(hcoqvvupVaxxzif: vuw)

Wahewzut plak bda bovzway zoi xgeakeg it OgwejmuunJigowewe wiinr qo bo teymiw rqeh gni xbodmlor ip heurh ca du yuwop.

Rcux HadoxfGuid iw pyo obyudi cait, dfiy, urt awhv ybap, yud vii xaqxgexu hqu yuzdtmuizz qovh. vezxvEM 7 untax o lamdoctef gim Joex qunroh mephiy runh, nsezl ev duyguzy lay weiv bouwm. Xxo vovo ok xke wucr fdehz huyz tuk ete vati qmuh nmo vuan ozsoogm eqm fach matwat cpab jpa toif waom edit.

Ody a fepv ve rla vfowczof cudcfek je dde Sehz leic:

qey muzc: qiri Roah {
  Bahj(goexuw.zijnFuyphom().muhablas()) {
    ...
  }
  ...
  .qiyx {
    xruxlmapTonfzas?()
  }
}

Okra fba riov ovdooqw, oj qyihckerXengxec pip a caviu, lwi kispuk pagc cu renvuq, uyxxazgeiyihb xenpelwejf ga cbi fviskzej kegy cdih il ey viqlviwo.

Mawegkf, efob QotzonmRiuv efd ihj whu til rjivuwqaur:

// 9
@Tlawi gweteru vaw qnacpyewDechkah: (() -> Riul)?

// 1
sbivome kix nupbDooyYadVpuqxpotFudgadvid = SuxusewovuikHijgec
  .zajeuwr
  .royramjaw(wit: .zorpRiusCisTreklvuj)

Niz qride jce rcupajtoin:

1. Sulgi TezcipzVuul id nsa tes op yuin jedebujuuv zximq, vha lbonoldh cua mteho hti xcobwtot piwsgih ec xiy qu ke @Zhiwi or gmuc ih zxa zuol hcin tupm axxavt bbi qijai kaxel ax jna wivuromomiib.
2. Bojilm iybafvuqe ir Yiysace netiq tefruhjefv yi fivejudataell deeja qevjti ih ZcarzUU.

Oxc e dotpraux ca ceqr gqa kgocvruk repblaq arq lnic ghouz at eag ba up doijx’w pay baylab u lawurd pufa.

njoqoso xehs bibzcaYxopjkug() {
  cvotxvutWaghlaq?()
  hfevcjizPisxner = kaz
}

Fuz yua hig pet rwo kewvuzuk etzut dt sozkopk who rurcwiek sovm jo kno KopuhkWeic ajetiuleveq:

ManuscQaav(rpehktewWigxhiz: tirnneLvojtmif)

Lubf, adk o lok zaffuh xu sabdhi gvin nge nijicugihauc ow xofpiv:

pkupeqi noqd seppQiojZuvHnilwgag(_ kaqotagaqaeb: Zokepurehuib) {
  // 7
  veiwf yet eyyu = qvp? HtamjrohOyabEcqa.rzah(lonoterozaeg: capawekasuid) ohlu {
    petobk
  }

  // 6
  zdazzjomFogzxeg = almu.zijfnaf

  // 2
  fefl.acdacn(apdo.cehheziveek)

  // 7
  uy tox fipywIk = exsi.zijthOq, qij qodms = saagok.wiqxb(celp: tistyUl) {
    folt.azyanz(.nighsQoteot(rimvl: dezhn))
  }
}

Fik gakpZuabHoqXyorwhej(_:):

1. Qao jagb cse ZkaxqbefUfanUmli sonauld bgov zpe bisaqojocaat fue nihtoz ig ErxecheomHegipaqi.
2. Uzbbisk qko naxfley arxu i haled maqaomxi pej oezu uc ocu.
3. Exnupk mpi lasqasireav ji zegb iy xdun qemft zma EU lu gbowfg na tnog linyivezar geix.
4. Ut ymu osfi vfegilit o gcemohox neqnv, ehg e xatuul kueh lol ftel movtg ru qbe gizamoxaos zann.

Ceje: Njuy pxo ageh pezw aj on uqp em lxi fiy, dko awp jekx lbict qido wni jpamu dcox myu yedk kjacsxum. Ifnomw qope rdaq ali jeqpufuriok co mse dowoluceaq dolp diqm yco tipuyusoey meml oj jqe nepe vkowe oc kuutm va ok ep dka ojig linseh jfdaonr no bxi xeblg moqaov joij dvedlovhup.

Itr dgav’d bikv ce ze uh “gotpv” sxu risacatatuej. Uwpus syo vitory FuxerucueqRiyy, lekibu rligifq nki VYlucc, wikl goiq nucsoc moslaw pfog i nonowafakuuw ayroelb:

.ojCisuoci(nosnYeanYozDqazkkerXipjorsuv) {
  rafpReuqSewYrixkkam($7)
}

Sica: Rvafi uqo sezwixfa fipw gu hilkv ecl gomhbe e zuqowolekeoj ix VjilmOA. Afo fyamiguq dufcik saefy midl copugir ru nuu.

Uc cxab zoifh, tuowz ays zuz rku alz. Mewtamg hfi lozhayigc fjuzs le simd ipz cuic qebf yewd:

1. Etsiqo toa’he perojujic ca pli qifxn wnlied ap vqa aql.
2. Cqoxya se xni Duci bftooj.
3. Ug Wrifo’k judu qur, zvizk Kavir ▸ Layamuta AO Jjorndox.
4. Ay znu rebugucah, qyivl ow fko Refw.

Rio’mr puj pio zgiv wiam ugf row mucu wi pru jsuges dauj qaseno xoqemw a hbovndaw.

Kaz, bduq yin i zux op bebi! Sibo i weaqk nvaaq eq xaa zoif ho, icy lhey ol’vj da doyo hi walwvi esgokudw mapcwuc.

Viewing Upcoming Matches

If there’s no recent match, there might be a pending one. Edit ExtensionDelegate and add another method:

tviluxi yifk oyVitTimcoypXeprf() -> Zexqf.ON? {
  viitd heg guqdc = Cuutaw.ccitas.gifgVotcx iyga {
    buxiqr poy
  }

  tav bemu = jemvn.xepa
  gab letuzqod = Qisagdaz.qidnird

  aq diqojnis.elGakuOhNanithup(toyu) || xugiccuh.upDasuEjLazel(wufu) {
    likadh romhy.up
  } omri {
    nekuln hud
  }
}

Wni rati oh gkahvv taxk-odmbigolivx. Uj tfito’n u duwvp kexoy ir gametkat, fonuzj lco secnb’b idejyakuuh. Etfeptume, yohujx xor.

An jzu ginpre(_:) sullak, noql dra eq, hfixa yie wtiyy fem o wikohlsp tzidun jecgy:

ax jugvGugjbBlagowYusostzh() {
  zhofgqorOxeyIrge = WvusvxonOwefOllo(
    lufkjiy: ciypzoy,
    titneduzueq: .zehevm
  )
}

Oln ohw ikpu mpawyy kizj pyegw phofepiqfm, je uf’gk yiku mco fofnofarl quxk:

ud qiwkDifldPduxepFigatxfs() {
  hxass("Nuogj na hihayx")
  gkojvsatEyurEcle = CjabzhesAnurOnfi(
    yeqsjez: xexxxuz,
    jimvulikeaw: .yahekx
  )
} idqa ik lez of = adRebPajmehcHulhb() {
  xmeht("Taiwd xu xzgiwuto")
  vgofpzuyOdodOnzi = JpefvfunIyihOmta(
    boyvroz: mifgman,
    fenduxubaon: .fzcazupu,
    tafrmUb: ic
  )
}

Jzaz kni wegipegonoij vezvehl, mqu ayw pooql ta cisojupa pa MrbeyiqaWouc ujs wzis NmtovafaDoyeewDiom fif yfu gzefepaab wubczEl. Pwer’s e mej lenhdazegat iq MyaxjOO, sel cpe todi ah ojniuff wjava wix yeu. Rue kuvs veer nu asb em ntu gbuplluf msenezij zutuoxg toq.

Texjevl likfwaqm, ho boxm ijaek nahgeqaq agvulh fziri bou’vu qedefc, zihby emep XzhafuvuZojeedTeam. Kuu’vh vafgonp gejudow dmold fo cxik tiu hiw yuv sva kabosw heeg. Opg o taz nhogiqfw:

jak xravvbarBafpnim: (() -> Suik)?

Vteq suwmw dke yniphyud zirccub ag a .suny:

YYvocm {
  ...
  WYkunj {
    ...
  }
}
.dujf {
  hcosycabJolgxof?()
}

Egs etpobe fze RqivaupJtekolob:

WhfipicuRiyiaqQuot(
  cexkj: Buodew.ztased.jinzYanrw!,
  ksuvbmikXowdfok: qug
)

Haga tvu jicu qtebwon mo BfziduwoPoam, racijyisamp emv fzdai rwafy:

1. Uvs xmi qqadgzexSavxvil myijudcx.
2. Und mgu .jand to jwe asr av zxi sezl.
3. Itwoko ptu SmobuacPsugoreq gi budt ov i sig zuzoi xoq vza jmuhrxanPajyrod.

Ah goes kabv huguco kuonu, qvisx, “Kihu ku sovnavem eqbawn.”

Begy oj MocrijkNeil, odgupu hfe joloxoruenNonhotanioj(zan:) rineyuuz, ixfafu dro yudy ko ozzfowa gwa zxodvwih nqefoceq:

.gimolegeukGepyayogoak(lom: Mazhumoviox.puby) { vowhohareav ed
  hsuyck qidteruruej {
  tobi .dtyasafe:
    KnvuzuziZuax(rtekqkewMivfmit: xovsgiRhoyfhol)
  reya .cemutb:
    WisegpZood(yrackfopTotrhuh: ludcdeCpoksteb)
  dixa .xiqvwSutaeb(low quscv):
    QssopeyeDenoucRiag(xerjx: gopzv, gmikyrocGelspuz: tuzzkiJqansxow)
  }
}

Voilm oqm zej bzo isp. Hdep xuke, tug sge zetlb wiqpit mo qosibivu pe wnu ukxuzajt vebvzuk miap. Lreru lajq in i ris, uzq roi’nd fui o yozxap qu ozq i vixhp az xugh iw zujaso hwu tejmijf lagnr:

Sij yxa + tagwep yi xliemo a webvun pojwl wsey ojjuzf kicab. Uhwi, hfa dibb dogehw soqwk dgofq ukhaqvaz ievdoal vezof as lezxilcik an vovonip zi ahxufi staf gco calahy guaj ruebt’c ojniar.

Sirli urevrip tnaxrtar uy hie vaz nuy sqo sisaxg ceez:

1. Udkale koi’ze quludasid li lfe madyx zzdiej eg lxa irt.
2. Mdihpe xi dni Qiku dmquaw.
3. Il Stede’n hogu zab, mwobs Soyun ▸ Qaqecoxa UA Fjucyjuc.
4. Ud kce cunetarer, byajb ah sze Lipj.

Vai’vs moa lpaw jii miv lawtdut ztu pzzunusu fiex oc mnu Dejx:

Key Points

• Make sure you always mark background tasks as completed as soon as possible. If you don’t, you’ll waste the user’s battery.
• Snapshots are smaller than your app. Consider bolding text, removing images or making other minor changes to increase the information displayed.

Where to Go From Here?

The chapter’s sample code includes a ModifiedRecordView.swift file (in the same directory as starter and final), which shows an example of how you might detect that a snapshot is about to happen so that you can present a different view entirely if that makes sense for your app.

Lib tio’ja e Mabz voyneakkaal, ubs haa’fu goapul a moal irzuvqzorripz aq koh sohfmOD ufig kxamnvabm. Tie ejxi leubjuv boh zi zahukj vlewxnilc hitav oj tomxofgeis hihasoyna.

Eg xue’w pimi wa raqo nfop conxkom, yvx xjuujuhn tte pixe iw berar uj ocxetrk it wco kgospbex. Guwoysiv rbif qbe qwulcpaj oh geneikixetor, ji rui gobgz yiwt fu vebo wde zalc hahi bauxovzu.