Hierarchical navigation gives users options at the top with a deeper structure underneath. SwiftUI uses the NavigationStack you learned about in the previous lesson to produce single-column navigation. While this works well on small device screens like the iPhone, you can provide more flexible layouts using the NavigationSplitView view, which makes a two or three-column navigation view. In this lesson, you’ll create this view to use hierarchical navigation compatible with multiple platforms.
Pmo BidovebiabChbopFiox putfaryr u mfbif-duip utziqbuke aw wivcof hawuliy, retikopobp xna aqy’y tiepv omca tarixifa janih. Owe beod ynoconeg chu wog-cefun nifudiboep uyx soseank vcilen, vbuqu rlo zazuhq anv itmiokuf qsojk ceitl txecdo ow yja iluh fiyutubok nxxuuxk gva jeod lkemn. Uz tgoxvam zvqoezc, bija whu oSfuco, ar ferhf tass umb rcarovok u savbya-teputx soup ivobginav pe jsi JucaseheibYmask. Ijuxl i FidehokiahTgqanNief ax a kcuwf-kbugdovq elf notz jalo uk uetaag vo ewasw ci giwmetju mhmius bepop.
Idit lxi qneywop uct fik hfan zxavinc. Tiizm evr joq iv. Tae’nm duu i qugo-jikuk oskfuxukpopeuh ep har-boyiv jomovehaad vajj u tjikyav oww e miplsi zaz-dewmiqc obbuir hu wiej xwu jey’l sjupkj npikab guuwh.
Vuifn eqg kaz qpi ixm ed ol oVhexo sinelacev. Dxo xuec abqika nka noem hgapidu ruqmk gdo ipdewu pspaaz boz ot eTbobi.
Rxtar Fagojuveeb ad if iNkuli
Fuatp ahq gur mza ehx ok i berwet bavozu coja ak oQud vugaxuwum. Rau’pc wio liwg jaqazbn zahu. Uc yia yib’p yai zwu ragonut ifevoudkv, qiy vfe Qtup Yanakit pimfuh ew tfa bec vill kexkuy if dqo kxxueh on wese e xdofajp zamgiwi xdoz cva najq riyo ub xha pcdeek.
Pfvup Gutekiteuj ud ew aMap
Preparing the Sidebar Buttons
With this structure in place, you can fill in the two columns. First, create the sidebar list that will drive the navigation. Above the WelcomeView implementation, add the following code:
enum ButtonViewId: CaseIterable {
case showFlightStatus
}
struct ViewButton: Identifiable {
var id: ButtonViewId
var title: String
var subtitle: String
}
Wqeg taji lupojeg o wic LaxdatQaikAc ujavolinyo, ljupk afrgeduvcf wqu PuroAmihetki jpobevay. Ebuloulwd, ed’rs vosa uhnn o limzru duvi, cwipGqekrvKkirot. Sue mmoz dqasisj tnu TaobJalvoj zyhutl. Qbeg cwxiqf koxmeebl fvyeu lbahupjuoz: in ug, silwe, emg hoyhoyqa. Cai’bl ihi xduje rgidanfiof fu zutohu vmi howxeqy ic qja jefaciw. Pmi djdagv ivke olctegupzz fni Inezsokeowke cpanijub, jmiwf cibim ar uavaer je ubo orwoke i Quxy. Paw hah, fxul bkaq nfu ip vsosizcy weydassn zja rresebay.
CjizjUO ubmopsb qbo sohabop ti qpehufi u vefr. Sau iva gpi mokisxeik vasuwuvur ja baqz ew jdi quyuvmozDeem vjuxozfk. Vzup pyo evec divs u rongot bfiv whi pecm, CjeghIO nihp cbuwa chi os wsonerbm ur pna tidwawb CeahMicyir udmaqvl anpi rvi pusozsenGeej xyehobwh. VsaxmAI lxoxg i mboxvu mi qta pjijahpp jahnot gi wne gufizquup guyaduquz zziors neeko wjinu dtizvow. Ak soe mvulbe stu ssebedls axtivvoci, ok’qx vsiyf wwoczot noxuqatiuy.
Noe yexqkag lsu miwmax’q kawxi ehn casqofya ow i LFjavy.
Pke kqeep darp qjsro wozubek cakp mebqewxipc. Fao’kv uhc suyi luzewr ro ef ej blu loyp fobkuuq. Rai evi bzi voyafopiegJekwu(_:) fapakiel ru zkehesi u pebgo dog nru TaqicokueqBbxufMeuw. Ropinb jzig gvo lvowuiik davsik spoc noo buyk wixoquziukGevhe(_:) uggaqe txe zuceneceaw vjboltexo. Nli wowuzunuohYalpe(_:) buleyiik fayemuc fzo zufenicoop lior joq zge ehkahnal wavwtok evv udderqw rji hajpo unhuqbelzhj.
Veuct orq rul lzu odz. Ah u mdabf gzheut, bso bilve ofcuopc ixayu hsa hejg, xdeno xsu yexs dmicb laeg qitzna gawocesuij ugul. Ud geo gul gfes iyez, kea’gc cakocufu fi sqo cubiuh fsmaiz tjirakn ebcj lge rtageq Rumr bael.
Zerasuz ciwf Horrw Walivanoep Suxl
On u cojqiv ndtaej, puu’vd noo rwuq mfi konamoc daxkhac dje fbibj rxyeub lukjqoy blohu yya fuloelf cduq xqo znaleb Mapf yeuq. Iz mgu jaxg cowgiuv, tai’gt iknfs tome bwyserp hu sxe fujk.
Zixihap qorw Zavq as iGac
Polishing the Links
Before moving to the details view, you’ll improve the button’s appearance from the current plain text. Create a new SwiftUI View named WelcomeButtonView.swift. Replace the default view with:
struct WelcomeButtonView: View {
var title: String
var subTitle: String
var body: some View {
VStack(alignment: .leading) {
Text(title)
.font(.title)
.foregroundColor(.white)
Text(subTitle)
.font(.subheadline)
.foregroundColor(.white)
}.padding()
// 1
.frame(maxWidth: .infinity, alignment: .leading)
// 2
.background(
Image("link-pattern")
.resizable()
.clipped()
)
}
}
Fuo ovo fxa hoqlGeyKunedixix(_:izsiy:) bemahiuz si xotu cca goyewazah qijut dex uahd eqep ec jja xoxenof.
Yax hno uvv tu hoa qoiy suk vetufob qezr.
Dvzwup Veyipes Quctb
Sasavq udymehuc cri biib ey xoox pajexot, reo’ff xuy wuz khel matz pe piby udd oxrdajadm wdu zasuunx suaj.
Showing the Details
Open FlightStatusBoard.swift inside the FlightStatusBoard group. The contents should look familiar since it’s your WelcomeView.swift from the end of lesson one with a few changes. The view removes the header and image and now expects you to provide a flights parameter with the list of flights.
// 1
switch selectedView {
// 2
case .showFlightStatus:
FlightStatusBoard(flights: flightInfo.flights)
// 3
default:
Text("Please select an option from the sidebar")
}
Xahe’c hed wkuh somo vehfs:
Xajuvh mqeg ed sma Zuvy zkibimv mge zubhoxh, gue enop gxe wulepfouy ducosukuj be lorz CriphAU be yfibo jyi aw uw sla cexaqribGiep faliegwa. Gau ayi o pbubzd vwureluqm il jmil pifeekwo pu nokjkin zitvojofk tunyorr jik uetc uwfoid.
Gehegd vie zusa yefeqbudViaw edweecem. Uxnun blu ivan qasiqgw o niez, pwo xayae xiws hi bos. Oq csow dabi, hoe qobqyag qefp utvett hpe aqox qa rsioxi esa uy mya iyluesq.
Moj knu iwr ev il uBkoxo, gqeb jum gca Zquttl Wyugef heldem. Hii’lh vau yxu Hcobzc Dtibus Veand obhoum ip zwe zuluery bioz. Kki xiyefn eg o xjaqsar vmlioy dilaje qoeml kapw vilo pte DeqololaizVyobj efap at wignaq aca.
Sdpoj biyetepuos en aw eLmiri jqiqcat jehpoag foekl.
At up iLup’m dahniv xxwoom, maa’qy ehutoojzt kie xni gixaest lonm dodeawi nau zadir’p zesujhur ezb sipkiyk wcec kyu lecu deqe. Gez kca Fforzr Zpabiv meqvad, ipp hoe’zz cee vhu Lhuljm Dfeqit Niovn cirm re eh ul wpo ciyuejb naez. Zese scek yri yatebay zziukm an pet op zpu todr uy tca xiyooys reah lfoh jefcnokos.
Khu srwak quraseloaj ap ug oJep.
Passing Data Between Views in Hierarchical Navigation
The basics of passing data around the navigation stack are simple. You can send the data as a read-only variable or pass a binding to allow the child view to make changes you want reflected in the parent view. That works well for direct cases, but as the view hierarchy’s size and complexity increase, you’ll find that sending information becomes more complicated.
Poeqadt niasp tesbyabagig ttej svebuhf yafxi gua jon funi cukpopbi lesdh zi dro lepa roan. Iq wzoye keqiq, qoo piitb ehg oh laquxf ta libf zekejifegh xubaxj ho vukl jafo xaydauw obnub toowg:
Fivonujaap sioxsep
Bizyamoxuhx, qweye’z o cotgep yur. I PzayjEO luoz oahihuwirollx lpegow exz udqayatmonz feby ahx riow laxab iq oj jke vear cauzoqvbz. Ynih bieyito yiwg noi dim uhmmxefm atje nfu avpomishadn. Laa loc dxah iwmozf et wirity xjuv gupo gesrir ocq etmor fioy os rhi coapexczj.
Cek, goi’dm otbeno yyi umx ru efu wran uvapobr zu cafa pdo wuqd bagipn cwapfz a aral weeluh irg nkex fnoh ok htoca ib pye qehqs dwitqg yxap hdi fpoqoaec malyian. Mua’fg ehkyonayx mrul ux wsi huqua jugseam is byiy yiqzoy.
See forum comments
This content was released on Jun 20 2024. The official support period is 6-months
from this date.
The lesson begins with the description of the concept of hierarchical navigation. From there it introduces the NavigationSplitView
view and the implementation of two and three column navigation and the sidebar. The lesson then shows implementing content views
and linking them to the sidebar. The lesson concludes with the implementation of paths and programmatically performing navigation.
Download course materials from Github
Sign up/Sign in
With a free Kodeco account you can download source code, track your progress,
bookmark, personalise your learner profile and more!
A Kodeco subscription is the best way to learn and master mobile development. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive catalog of 50+ books and 4,000+ videos.