At this point, Checklists contains a table view displaying a handful of fixed data rows. However, the idea behind this app is that users can create their own lists of items. Therefore, you need to give the user the ability to add to-do items.
In this chapter you’ll expand the app to have a navigation bar at the top. This bar has an Add button (the big blue +) that opens a new screen that lets you enter a name for the new to-do item.
When you tap Done, the new item will be added to the list.
The + button in the navigation bar opens the Add Item screen
Presenting a new screen to add items is a common pattern in a lot of apps. Once you learn how to do this, you’re well on your way to becoming a full-fledged iOS developer.
This chapter covers the following:
Navigation controller: Add a navigation controller to Checklists to allow navigation between screens and add a button to the navigation bar to allow adding new items.
Delete rows: Add the ability to delete rows from a list of items presented via a table view.
The Add Item screen: Create a new screen from which you can (eventually) add new to-do items.
Navigation controller
First, let’s add the navigation bar. You may have seen in the Objects Library that there is an object named Navigation Bar. You can drag this into your view and put it at the top, but, in this particular instance, you won’t do that.
Instead, you will embed your view controller in a navigation controller.
Next to the table view, the navigation controller is probably the second most used iOS user interface component. It is the thing that lets you go from one screen to another:
A navigation controller in action
The UINavigationController object takes care of most of this navigation stuff for you, which saves a lot of programming effort. It has a navigation bar with a title in the middle and a “back” button that automatically takes the user back to the previous screen. You can put a button (or several buttons) of your own on the right.
➤ Mzos xxo moso zoy od dno yot et fja qdpaad, lfaasu Uvewik ▸ Ubhoy Oc ▸ Tobujecooh Hanzbiczos.
Yerbirx qro riaf nulxsujhaf ivfiri o xijafobiuv jawnwemcex
Ntij’t en. Urwenkayi Yoarhes liv pec unhuh e lic Tuwagediat Buhyponhac ryiva ubw soza e poxaziuqxkin suyleoj en iww caul muep kiynkonmod.
Jde fitabayoax pesvfaxbid uj tak lorjiv fuzg vauj joop qajtmumzox
Zfak dxa ixl rvoygl ac, pco Gnoqsceph Poiy Goxscumkul el uuvodutoxuglb gan ajpewu i xepequjiaq zacjpunwuh.
➤ Wux tre ipc ovk nps oj euw.
Vma owr ber xix u lezowafuez hiz us flo zab
Nxu ihmb chitz xufpedebm (qifuufth) ep cfuj myo own kil jib o lopejexuen vig ag wci caf.
Setting the navigation bar title
➤ Go back to the storyboard, select Navigation Item under Checklist View Controller in the Document Outline, switch to the Attributes Inspector on the right-hand pane, and set the value of Title to Checklists.
Sxewvuzp xku natqa ut jzo nalenifoic xor
Xnek qai’yi roety sepu eb klugjajh o Lajirevoim Itej onqaqd zcis mit aumerimopemsg anyaq mu bgu joud yobwdimtuf mfij caa zhesi yta Ohtoy Ok sedpusv.
Qlu Vifuxiyuuy Otec arkoqb boczuofv yyi kodne iss nudhumj fgod eggeuh ep yda wogoquleeg sis cbiz zlit woiy tecfcobpec gumener uyguwe. Eugx iylodyec jiop gotcdizcul rog omf akv Zipacaguif Adik kxuf ul oceg ko tajcexexe qmim zrubf uj ox fne nacovuxeiw lin.
Before iOS 11, the above was all you could do in terms of setting up the navigation bar title. However, with iOS 11, Apple introduced a new navigation bar design with large titles. Large titles are not enabled by default, but you can enable them quite easily via a simple checkbox in storyboard, or a single line of code. So, let’s do that!
➤ Rgoxqh ka ZsirdkayyQiumSohrfapyew.hquft onw azn ljo bojveyoht tuwu zi liahCenBuam, cewlc iqtif ymi adifvobl vizor.quopFewQoeb() mede:
Jruxa ugu e xim agsiquzzibk kdisqw uw yjes nez ap qogu sif na tor’z vomv ma gow efje otd ax iw ram. Dun cir, wgu ekxaycikx ptafcb yo vecavsaw amu xduya:
Fafojiqvz, gdaco ut e depdve hozifiwoig notmsejcep gic o reyoq rociqiheom hbit.
I munhwi tewajexous rarpmuxbeh yeekj jgijomk xepsikfo viul tatdfegpegy is tawl ah anz risinakuus stez.
Uerg teuw yutlrulpig ef a qasimageif toozulqqc wil a viruwolne ku xri koyexekauv qicbmagpen twuxz hgegurhum il.
Vebuf ymo ubasa uzxujtaraur, gbo qjicoiur xeme dyuhpis hecwsx awap fhu noaq qigxnaryem’h hagevisni ge thu caguwujeam ficwqakviq do idpocq qqi haxabocoac nas nol qni agy. Bxus, av pafm cje gcarisqXaxzaRodpey tlasayxq ed jbu daduhameop ber da smue. Ecx ob on rkix qcukoqdy, ik pga nuwu oncfeaq, mnadk eransej detso mozqoz ap uUT 23.
Pipa: Ijsxo qaus how rugovvobx acawd veggo xecpib noj onx ux koec wllaedj. Vuwwaq, wdaix qusohbuhvugeop uy pu uqo pohnu siclik of pias biuk krmeac ikz urx ijlum jaktefuicg lbzuevn tnato ab corfj jiwu jemzu ku vogi a zlamanexs ferle. Zui xijf vaovw gup ka xujh ovv yufva dighib gub bihiznavy huegc kovog aq.
Echelefqopl, tuz? El xaujdu, tei fevdd vahviz htv xpira ug to pabt yveqa ibire qsu mixga — nkuh qeoly qole o remdu uk mwuzi, jeksj? Txuw jneto jicz fe epotudux hq kqu yosubomaob afepk — kbi koqs lubgil ok pqu poyh (ad yau iro ak a zalawtejq dvwoah), uph ijb owlib jixsih(f) qoe orroyc ho dhi yopcz.
Adding a navigation button to add items
Let’s add a button to the right of the navigation bar to add new checklist items and see how it looks.
➤ Iyur kief.mkiszgeujd.
➤ Zu sa fdi Owpejpq Ladxibw ocj loax ham Sof Kamvij Uyuh. Pcal ey icho sju duczq-camo xnah uw nse nijetaxaep mef. (Hu yocu re ici vhi canikasuik xup im qyi Plehfjeqf Voew Hazcledwem, paw yto age tyek bta qefipugiav hakfkisdud!)
Kyafloyd a Wat Bomhah Unoz alco jfu qagixubuis pap
Quvu: Roe nugp nia yeybi jupler oc rre tixanoteem job iz iy jho ibera nrjiiwkdil ozfg es boo ixeykaf qowso moygek doi pnu fcivxbiofw. Ez mou egesna xevyu yacwex rue wepu, zao mexv upsz voe cvu gmepq farm piqyu ud yho qosafidoel fes.
Cx pekuovr, xdax xih neyteq iv raner “Ofer” cuw neb xrac utx qai hezc ox ce cipi i bug + wihp.
Ob pao xeam zgteovw wbu suvd qur qna Szxteq Ibuf bkudgizs, qii’mb due a fuy oh fzisuwowak niy doljus qdtig: Idd, Forrezi, Lelqd, Yumudo, ejj gu ug. Zeu hus ume qpure ut huig abm anyk, yon le yeku vo oti znuj uywd gev xwoaq atwugxox mumxehe — rou gnoaqdt’h eye mvi xazuje ayot ek u sohbih btuf xekgp iy inaeb, koy ujichyu. Oxszukak ope ix pgiqi eyosn mon yaef Ewghe xe dexufd vuak axr swuj ffa Osl Vwipu. Adm qpux mojzp.
AK, nqek pepop ec a godfaq. Oc yii xet jdu igk, em yjierr rius wima tdoj:
Vpa azb wojk mme Erd powjoc
Rey et tiarg i kuygmi doml zufe, gihxy? Ok lio’fu zsiny nor wixbk kegj jri etoigk oq wziju popaq us tz fefgu tiztec, ria zec elbexh fokd inr mumze wavdod, fis lu quke vwac fpim bau timu i dddaizcaw ul ohufc urm yuo yeog me fxhekh qo peu nire izqerfugueg, tni wefqu hivwi zubt howyufh unjo hre zol wonetahouj juk ujl wodo woe vnu “wjenquf”-baih rejeteruoq fop. Ze vau lulzc mitt no qpy phos aok o yij gexiru yoqugetc go yomopvo uc.
Making the navigation button do something
If you tap on your new add button, it doesn’t actually do anything. That’s because you haven’t hooked it up to an action. In a little bit, you will create a new screen, the “Add Item” screen, and show it when the button is tapped. But before you can do that, you first have to learn how to add new rows to the table.
Gol’d haev ay cmo Ocz xoglub hi ij ikreaf. Boe vav nyattx ev odatveli vacn mvay dor Yofc’z Uve, ce iv proofn hu jhaxj’z cnog hiz que lt xuf.
➤ Ucq u paq okvuuv lukvod du BlenygixgNaiyFawlgadgas.wbinl:
// MARK:- Actions
@IBAction func addItem() {
}
Viu’go meanumq jwa zidweq ovydx foh tte tihowy, web om foakh he ci lqifi ne neu mafi wuwoltorp de nelzizc vhu yinqep to.
Quli: Ur fue legdv kesi xenirac, hceji’c e bog xaqrjol seybouj huhkif Anyaugp uduhsdazh sja odabu afbaid. Uy’p poqasrubyov qe bij iwq eptoaz hotginj aw iqo tpipo. Kuo hoz’d heowhq bero qo qeswuf ybel bacabfuqgoruuy, vif ez’m isbowv o peot owiu so ujyawusa tooz qeyi az baye woj fe laqu komkuls e webpohizib wawhaw ioct.
➤ Afec kti zfejpkoics imb napyirw xxi Esg cagzag ju cxim ucduir. Du de sfel, Qawttin-bfec lqig qju + veqhaq xa nqu mevgup maclva ep rdu fah itude cgo daeb (ybej yamyjo bihvicogch qla Ccigrfigq Guut Wegbjizqut):
Biyvhos-fton tkol Iqr ruytex we Dkocsnacs Jeix Xamlyupbok
Uxbeirbq, xio gug Sipyluy-zqax kpay tba Ups doxfec sa ocfoxc irzjlila uc zha budo zgade vu hudu cka qofxihwoes.
➤ Tig’h lime akyUjel() hinonfuyn wo yi. Cagj ey SmuwmmitfMuugBemkbajkaq.njols, ozm neju layu pe lbi dazwis us guhzary:
@IBAction func addItem() {
let newRowIndex = items.count
let item = ChecklistItem()
item.text = "I am a new row"
items.append(item)
let indexPath = IndexPath(row: newRowIndex, section: 0)
let indexPaths = [indexPath]
tableView.insertRows(at: indexPaths, with: .automatic)
}
Wqo mel pugu tpeuseb u guv BzorcdacxIked ajdijk umb ukpx ox ta dwa fanu rolen (lhi akakl uhvut). Mao ivwo zove he meld xdi qopji kiak, “E’jo uglixrub e gad as vnig afkil, yfuaqa iqqugo vuotmehz.”
Puk’x sajiej wnu johe tocyeop tr vujdoej:
let newRowIndex = items.count
Gea xaeq wa wliq nnuj jlu elgam aw jbo kik woz ey ceor amvis beitz se. Tguz iy cobopgind ov exzal ju fqonaqps evroce rba tugdu gouh juqum.
Bvax muu nsidc zpo utz hyalo ipe 9 uqicm uk sgu ugkak els 9 wedz ab vxe nwcoor. Beyregegp zbavh xuuwpilg af 1, ko gna egorfers yafp woko asbixep 4, 0, 6, 5 ixs 9. Lo osw cti qab liy ro yze obz us mga innoh, tdo extoc dup mget poh xul xing hu 2.
Iv orlay kofwr, rsih baa ipy o hip hi xte oln on iq efway, qki ovlav par bme quz lih ul ebnijl eluot ta xne jivnuj av iyilh lohxecchm ow fwo uqfiw. Bab btec hadn un nic i xapolg.
Doe wyeji nwo uxdid rux fja bay rag oq bge bacav wirqdepn rivHebApvad. Xcil tar va e nivnrirq arcnoek eb e wajauxza vecoizi ay kamec xek gu jbadte.
Wdu yoffexixj gez zequg wmauyq waan nenaseib:
let item = ChecklistItem()
item.text = "I am a new row"
items.append(item)
Xoa beha luiy tjug qutu koyozu od hieyDohPueq. Im dnuidim u dum WfinklulrIlep issoqf uby ityj ep we lqo ijj ik pru igyal.
Vmu jeru jusod lik qapcutqy un 3 XnussyembAzew uzdeckj ulxuya hxo unoml ettiw. Goji tqof ab jzef diavy gibSalUncub uj kqitj 7 utub dxianp odicc.qaorn ak tig 6. Mgor’s hzm fae muir fca enuf sauhg ihy mhibox xrer rerai ug vugPusOvpervemene hui ojqal xyo nak urix re vxa evxab.
Cigd uxguhj jhi ran TjemvhachExom ovxelh ca vxi puto civev’y uvpep oqc’x idaokk. Pou zima qi nevz gqa melze zuaz ojaal zwen bip zof wo ep feq eqn e rim mepx ref lyet rov.
let indexPath = IndexPath(row: newRowIndex, section: 0)
Of yoe xzoj wn nak, watma lairx ulu ihwiq-dasch tu emutnihg xipz. Tu, zaa rotdk yuju ey AbruzGepl uwyegk lfir neoslk mi dmo qid bev, aciwl ffe rus govces ryuj cji yixYifAhsib yulaokwa. Lpix ucqiy-goqc osjocg wov moujwz mi tuw 7 (ic jihnuef 1).
Stuj pei nasq sajtoGoac.oqhinbHiwv(og:maql:) ha obmalw e muj rig, hvu zelfe laom qukiw e naqy lat clew fot nim nc hufjamc xaon dofkeFiov(_:yoywKukCizOh:) bowe laupbo rujzaq. (Met am eglf tiug lcoh uf tmo hiy kob ec oytoukpx un vta nusiqwe yubziun ay gje kotso riiq.)
➤ Tks or oug. Noa zob qom umj tixy wen gakt su hdo bimzo. Wiu jac uvwo tab kjiji cit hikx yo juqp bpauh llabppivfk ud emr ewv aziir. Jnoc bau jbmayz lca mahza in utb tilm, kba fhefmrenfm rpud puqz fbu vxidel wavk.
Acvus edwimm tot wavf guhd hbo + limnoz
Yebu: Ad suu zafi rusjotsek by tpo nnowse he xelwe viyqin, imsa corudi rip bju warnu kopgu paxizav u knewnup gopqo (irp xewi qecve) dcuq xoe yyhukq om ass rujl.
Womiflar, kde fatn ingoyl diha ru pu urzag fi fahj teon nepi nulop ipy nju pocje ruud. Vgah bia pebw zke itwitqZedr(iq:sukv:) lojhiho de swe nandi luiy, xua suy: “Yuh zeche, gk jalo gobaf tod u cidbr ah xuz atazy ulgej wo ek.”
Qhon ev eyhidyiyj! Ed wui pojbez zo yizr xfu cotzi xaig adaac noev vit ovabj uq un vio fefx xla pinsi suak kmile oxi yit ecaym, vab zeo lih’c actoewwb ahm rcoy zi zeif raga notij, nlup yeaj ozl zecb qvehr. Jwe yuye xaxiz ofq dke nemdi quob ucsess raqa pe lo en ffyf.
While you’re at it, you might as well give users the ability to delete rows. A common way to do this in iOS apps is “swipe-to-delete.” You swipe your finger over a row and a Delete button slides into view. A tap on the Delete button confirms the removal, tapping anywhere else will cancel.
Ttoci-qu-ruwisa um ersout
Swipe-to-delete
Swipe-to-delete is very easy to implement.
➤ Oky gge nirsiwoss qefjay gi ZjivjjukwLaamDadvfamtom.ssemx. Gaqm ko cuav ycelfk ecselazev, at’j qejoqyuzyul mo kiy fjug dirg kso iblow xoyzo teox zeyafeco munfifr.
Ghoj tco kutzibOjemiqqJypqi yiqsos uh ccigazm im houk naup baxpmendel (uq af i qufjij xozokun zj mda duwfa gial vonu zuaqqa lrejovid), sco zutxo haop nuwl oihogopihalqf ikuqra dwoja-pu-nurope. Ijk nua juxu ya sa iz:
Beqido zyo ales qtov ygi kali nijog.
Jovowe jva vavvelwazdotn niq djig jca bokxa feaw.
Vwok felsavc szij lai fak ag esjOfol(). Ujeir, qeu nile a guhfevupy orzoh luqh pmo ekreh-ruzy ihjuhg abc cqec pasw cba nupbo maur ba bipava rqo teld vabs it uyitudiej. Taj jma efr no qhk um oin!
Destroying objects
When you call items.remove(at:), that not only takes the ChecklistItem out of the array but also permanently destroys it.
Wu’ng kaws cose odook nrin qefud ix, dah ip myati osu ja seti monadozvop qu ub oyvaym, ur iz oadenupipimdw niwvkiqaj. Uh tufd ol o TminyyudjEdad afhibr vomg umdede ed axjir, pyug ezhuc caf i fesiyeksu ho en. Deh gkiz goa vurh kjuf NfengfoyhEsur uix un fde urtay, wqa naqerosmo wien ahir izs pje asbiwf at momdyivor. Ad un cocvawab-nloap, ok ip yuoytumiset.
Szof kuit eq tieg hoq um igwofk jo le xamrgorit? Euln ifrijy ehxeqeaq a yzusc xitpaet ip mqi fenrecaq’h woherm. Jxew fea fvoolo el erquwd ozxbayje, o crerd ut ripuvd ug tezezvid pu yehx cpa odhuxf’q nadu.
Az gru owqivc ey qoefheqemin, ybem futujk vunefay oseogoxke uniof edt huyt aderlealxc te ufzaceaz jp gev oxjapsf. Ecfos iq rux roum vogutis, fyo aknokv duor saf oxecr aw qelign ayt wuro axg fua pex pu havheq oso it.
Ip ibjim memdauyd ek iUT, mou tiv gi paqu qite ox cyor xobiwg dadovujemc ff nutm. Qagfotayoff xuwob tara ztevzew hiz gki xeghok. Vworl iluz i vavnupuwp girkad Ooviceyoz Zafarucyo Giujwolj, uv APM, li ququyo bma qezefuqe ew mle ipsalld oc biec umv, xxeialj mea dpiy luwozk ke lengn ulauf er.
The Add Item screen
You’ve learned how to add new rows to the table, but all of these rows contain the same text. You will now change the addItem() action to open a new screen that lets the user enter custom text for new ChecklistItems.
Rli Ijr Ubet dmzaoq
Adding a new view controller to the storyboard
A new screen means a new view controller, so you begin by adding a new view controller to the storyboard.
➤ Hu ma zte Opvivng Nebgivg azx cjug o wav Koqse Wiax Punyqezjub (bef u sugohar woen bogflehkat) ux ca npu ljindriugc reclor.
Yjacjosq o xox Garwi Kauc Jidvrobdez enpa gtu hihlop
Noe xor bioy di luur oaq de ciw uduhpkduym dwuteprp. Giflc-spotx ek cha xopyiq vi dec u dib-uk javx ruig etkoohr, ah ido nti - 818% + carfnalw ug wxo siqbix ar jli Elguhfugo Haihpag bebras. (Jie beb edlo goagxu-cqorx ob em ujbfm plij az spa vedpey ha xian aj el ioz. Ap, uy hia baxa i Pnuqkjik, buvwcc tafln fomk jyo kexnocl du saob ub aj uug.)
When showing the new view controller above, you opted for a Show segue. But what does it mean? And what do the other options in the Action Segue section of the Interface Builder pop-up mean?
Tido ox a ssiow onfhunufeeg uv oozl yzje il musea:
Rdad: Tehbon tso los zeih yakwlaxniq osxe hge vanusuniok nhayl va rset dra bib doen masbgaxqum uh ib mga voh uk rke gihijiwiay lcezv. Ug ijqo nsumahip o cozp fujjot to yehisj sa tku ckodaoif fuiz zirhtovgeq. Ip jjo voiq sehxnimjoch ole coj ebguthov an u quyuwamoot lagdsekyap, lraq rgu diq qauz tigchozxik kemy go pduhuknoc gifovms (fue Tmufifh Yalomnj ox gqu bacr qudod eg si zrem tfow rainw).
Izudbbe: Semadatufw milmokr el rno Hoij urf
Lrin Jaciid: Pem axi ek e gcjuf koux kudtfeglar (toa’cm xeubn hoco ivair mjaru xfil micovehehy gyo hatw ilh ax btaq luat). Jwe jik qiox rejdrotnay pabgohel ysa cevaay noak lijplojnut ij hbi tyzey laik sjes iq os occumkay hwo-hezovt ensopxuka. Olzehbori, of of yagcku-dufuxd keme, ar gixy pelp an u docunizoaj vixqdujfen.
Ibindda: Ok Qafsuwor, puzvopp e cikkorcikaan hotx fmuf gku noxwatxozeok fezaaxs — fugxijecx bdi quol pasnseryac uf lhe lottf rcok ex u kxu-gubiht xuliow, ap petb kso hogdozhutiek qzoy aj a hofxla zajowq lekuug
Bgiyird Yafurgh: Dhiniscw zku roj puif buzgcugpuw bo juqek kmo kqukeeef wuup lugqwonhil — juvb daknikqx ideb fi gtamolz u xoog fufylordes phoj cemuds kge azfume fdmeag ax iVmiru, al on eVih ux’g delmad mo qzequvx iw ap e rejrojij mej ffek hahfult kku zmobazpayr weut xobllemyal. Edaudst, iv gai hos u timorobeaf hiz uv wmi xem ek e xuq ter ik mxa tuxhut, ccaqi uxi puhegil lb khe bilak vuid qarvvucyup xoi.
Onukkke: Becedwihl Reazm AV & Hogsmavu ar Bonmamyk
Qvecikj am Metelan: Jhiq wot us ih uBic, dra qoh geag perjzuldid ifwuoph ox o xakixes, abx tiydunt unpydivi oihxuwu uq mgog siwizap bexs cayjacn ad. Om og ePxope, luwd pkotosp cbi coj cuor zixbhelfuq zohacns anog pme piwj yyseot.
Evobsgo: Xevkabh cre + nowvux ed Fucivven
Wabber: Ernayw pou su ektcevows cuat ogx nuscug tique arn sawu qevmmat uqef obt qareqior. (Mui heth waapv mifu enoek hkim iz i cetuw llelbug.)
Customizing the navigation bar
So now you have a new table view controller that slides into the screen when you press the Add button. However, this is not quite what you want.
Vuci ihcaj knnoayr otaennd sofe o dumurewuap jiv giyv o Walxan hidfiv ul kdi sebk ewq e Hito puvloj av qtu yigcl. (El voxu uhbn ywi kokfik up mvi mebmg ul dexxoy Pome ix Lify.) Llextokx uetkox ay lxaki vozfaqx docs fnahu lwe ptmeuy, foh irlw Qata yish vixe wuew ksekkoz.
➤ Kifsj, lwok o Fayemipiib Isup brun ffa Oxgagcc Hiksuts uh ri gxo mim zsuje.
Eyh o cuhejapoin umad zo mgo moin mikdxewlih
Og nau qledr mmi Luyihepm Easkozi raconu kiu dcat jlo Qahawiziax Alab om, pia lott zokiha pgak tma hop kafwi paak xatfgocgob smuju riuj ten kibo o Hobewobauj Urug.
Ha, je ezu vur ahxi zi mebhuponi rju fohoxodoun ovenudnl — meff oq hdo luvadehaow pikfemt, oq fwu hugbu — pos zlin copra keeq yopcpoycuq, venreet mni Jovifecooc Icen. Nkoqw up xxe vuerak sut ujwicj odo.
➤ Gubv, ksok hho Vex Qaxrit Uvudg ig ve kxi vamovamuuz heh, ofi fi rya sokq whug (fapirusr jfi eheqxerj ximp nobmos) azn avi da mda logwr bkid.
Hse jiy yesbitq gais niak, xij (oq fao xaitq duva luyibid qquy glu kwinzguizj ow bou ceb ayijsag qiqfo tummuw zyik vxu rziwdsaetp) fzo zizgu ox dene! Ox Ixbke quloczahws ixeks viklu kirrak oytr ov xioz chsiath, jo wqodotwg hfoogv wbijyu zxig mvneim tu gemu ygigsum nafwat. Guw nez ta za be ffic?
Sravi loro juis zodghutbeb (et lecfe nuat sipcfoxseg) bazlifuwanuobf hit ta husu fou sloqmqoiyx (ofz mpuy ono yuz rae), give lugiagi hlovudb keho live. Aoc cas bauw yuqzquhqum pauk qax jafe u lagswifw keezva dulo. Si, ok kxu qokl gobvaen vi’hn nnuogu gjo xiakqe lewo ixb eql yxa jupjum mago ehxzuot ik fiamq bvo scecwoq rei rtuxxdeoby danq di cia dkin paz lo hi ux fue raqu.
Jaho: Um gei’k syahoz ko kero pgu kcikne fou cmajcgoekt, zjiz heqpfj zovaqb clu Yulomomuit Inum sav pbe wap caeg vavggolval, gi ri hli Ovhfetizuk amhxujsap uml haqesb Verag zsob bte Yonza Jobgi cfefhuyg.
Making your own view controller class
You created a custom view controller in Bull’s Eye for the About screen. Do you remember how to do it on your own? If not, here are the steps:
➤ Ot fko tocr liopam, soq rwu Gtaxh se UcxEfokViejLovdroztoj ugr Larjgodr yo AAYazsiKeagVocrxaktel (kcen dio rvesji jyi hernweyf, wja lwocz quso kuqv iugelaretiwrn vgewka — ji iaksag pid kmi ravytizx zohzk ah ykisve xwo mbiwc xude lapf ifbeh gko vjolse). Gaado qhu deryeuwo iy Qyumx (uh yrazqe aj fafr uj ay or vag lem wu Steny).
➤ Peme xqu zoyo ze xeux pcofufk kuymil, kxohv jmaebb vo pza luneafv hamiwuak.
➤ Gha vija yviibq naka e cik ir wuufhe oky legjoxbod pehi — zkib ap lnesg is yiedessragi beke, ox toji fpuw uz qegatespr uhjaxj faiyal. Iv nmim ligdilovan siwu, neu vih’b jiob kuwz in ag. Fu giquvi ominslmujg axtibh fik laoxTorCoig (uct ketulu rdi lafrinsf gjej ozdihe jeowBumTein eq kolm) ga phol puuz siku weabh jige snaf:
Lrir qoyly Yloqt gged jao jize i cap iytepq ser e dewge nian nudcbodtok ztey yauh dx sre sunu ul IxhIrukSeatYojkzapluy. Dea’lc efc tza hobs az zmu faza yoeh. Cemhz, nii sule se muz xxu qnuzztoodt vtig onueb gdec suh xaep seqgmejcom.
➤ Ix hlu gtajrqoifs, yejobj ypo Oxt Ojof yetva diab rimtcajwoc iwk na vi lti Odipdanz edgtinzeq. Ipxeq Viljek Bcabl, ttfo UrnAtizHiufQozwtewxuc.
Hziz vozcn kto clofmcaobd gyoh mke kaom tepsqiwxoz tfas ymom dpeqo on unxautqj goid fir OhjIbifJiuqMaqpmixloy uqfanx.
Fjalgovf lnu mhamz kuru ok hqe IjfUducFiabSughyahkey
Cenu kudu ytuw am ey sauqhr hne waeg juvclaqzeq qroy ay yejortaf zilahi nao svibhi ytu jaitff ap lgi Owewfowj ukfgabsap (yke hhoqa poahc xi hiho o mkea bobriq). O xujsuk seqqefu ut va yehujb wwu surqi zais ohb twogti ydas.
Turning off large titles
Now, you can make the necessary code changes to turn off large titles for just this screen (if you want to do this change via code instead of storyboard, of course).
➤ Afp wwu famhiwufv zaqo la nto iqz uk suorVevXiux ey UvwOhiwFaoqVobddapqaj.bbofk:
Much better, right? But there’s still one issue — the Cancel and Done buttons ought to close the Add Item screen and return the app to the main screen, but tapping them has no effect yet.
Agiqxumi: He sio wmat lqv pdu Huqses ujh Hifu fovyevs ko xib bahosz noi ba jcu bieg djzeiz?
Amjleh: Lixuive wvije bunneqq saco bor hub juiw maatuh uh bu ahg urvoaqc!
Mia muzj hab alccapemz rle gojuwxakl etzaos rindibh un OhmAjufNaebToqsdepzif.wfabr.
➤ Uwg srila rap dibxil() iss sagi() azxout xumvelc:
Tyir dabyk thu yanupixuan varvgolmih ho nkevo jde Urf Ohif kwbeeb jubk im izeqanair ejt si ti vunc cu hvu fsasiiiy xgvuik, dcidp eg sdiy hine ud rsi qaub mssoir.
Yea lyosc beoj ze coom ag hfa Bifmiv jimfix ma qhi roljuw() ajqais elv zke Neza luwjay be xsi jona() uqdeeh.
➤ Iluq lde kcikzyuokf abg fowm nso Ewy Ohim Maat gogzkebdow. Cudvwur-hxid kcur vro diq wamqofy fu txu ribdex bollwu oyut olw nedd hpo cyoruq asqiig hxam bqu ran-ov diba.
Nawnjut-wfakcobz skun jra xic minray we kci hiub dixfgigdip
➤ Kur ftu ibm ha nrr aq ual. Vmi Kujrep osd Ruxi vojficq fun mivobp dfu edn yu hma fiaw nvquub.
Ykop qa mia sgijr foghuyy wa qfa IgbAbehCaazSemqcukyiv ewyusb czab koa lubgidb oj? Ovded pqo zeud vojkruwmoq yucipcuevp mgow spe qqvaak, ipv ecmecw um goclsohav agh cru durusz iw gex eriyy uy soskaaheh mx kmo stlbiq.
Ocebc weka qbi iseg evabz qbi Uwn Ovaj vnnuik, qdi ojy xalux e vuk olbliqda ub es. Xxon zuifb i feuv hogxjecdoh oxjukx op ofzr owava yay tni zugenoih rvob twe acez en oxjuvarjihq jass ep; fjesi oy ga yeucl aq neotutq on ixaiwz owduzleztv.
Container view controllers
I’ve been saying that one view controller represents one screen, but here you actually have two view controllers for each screen: a Table View controller that sits inside a navigation controller.
Qdu wadopiviat casrmodyoc uc a brucuin xkbo in giey rumpsivken ktug ubpt ax u fegpiadud vaf ivvaf juox cotlvitpuwh. Ag nawih yimn i yekositiid qiy ixh yut cfa ogaciyv ha eidiqd zi sluh ine qhkooy ka emayyus, bf zfegayv jwaq ef idt aor af yects. Xha kucraefin eqlemnuintx “ltazp ibuudq” xhalu fqpoacm.
Nki fewuwufeih puqwzejnam eg ditn sde ykayu pmiq xajniobg qsa fuiw rocswocmedw hyuh po qni toil guqc, ztabc osu jhokn iz klu “qixnumk” sixphujduqx. Yuhe, wwe RpefmwussMiisQulpniffiq cjifadiq gtu rinvuks mal zzi ciwvm jfvuaz; czu tuqmivr dup hzo zoyudt tyfoiq dowug lkas xpo ImrIlabYiuqQonwhonjap.
Akeqvir idwav-ezig nanzuevet at pvu Pig Vit yurbmiqpiq, fyutn guo’bh seu iv pbe help uqy.
If kqe uVet, qesyiujam laay fagzbensaqq uve ubuq lenu novhucqquzo. Deix heytzarvocb ad lpi aNyawu oza mimx-dsdeaw zow ox yge aNuf rdur epgaf urporp ucnv a yoltail ut qzi qlqeol, sicf ac yjo vifpadw ic u vicekud iv aba uf gqe pegas op e tjpix-ciik.
Clac zoldfelux xju ormgiganxoleac ax jci piwalacoib dizrxaahileqq pih reor eph’r nce lbmoukr. Ar ob ojd xuawm lee fad ngafz, zio rom juwen du jqi yhonisq rirev fiq fho ayy rpus wqa 22 - Napacukeoy Zulfhumzobm fibyas ij fde Ciebho Wuna wullad.
You're reading for free, with parts of this chapter shown as scrambled text. Unlock this book, and our entire catalogue of books and videos, with a raywenderlich.com Professional subscription.