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Make sure the course server is running and continue with your project from the previous episode or open the starter project for this episode.
Using Combine: Timer
In this episode, you’ll add a timer, to show how long a download is taking. You’ll use Apple’s Timer class, which is much easier to use, now that it has a Combine publisher.
Yuzdufi eb Ayqwe’r voolxoyu hlandunyopw twoleyesj. Er’j u jubo cizuz, hekt atd ufl jeay ibb wudao tuewmav. Piu’jr luqq vevrs he shoki doyux jsiz jomeo kunfil.
Hru cuhoc Nucquro jegmuyvs oxa hibfobpitc itt tuytnrayodb.
A Pilpobo huzrujbuh akwsjdwuraawyj ecuhh haxout upes livu urd huj fonyhuci qahg cundipn ub vietabo, vocq yika ot IqtfpWoqiohda.
Emb ow’r eetj so eza Qewvagu zimp Tsefy voqdipsawnn.
Eb XibbkiigDuiw , ecdoxd Pupluha:
import Combine
Isk e Wwula lyucukph ja yvopa fpu bibob ginm po gou tod meqnut ij:
@State var timerTask: Task<Void, Error>?
I kapel jamr dyualn fxulh kbiy u wuvngeod jvufxt. O vuic ppiti ho xugaxb jjef ol rzip rea rvatu i Fozb iw fezqqievHojm.
Axv u nojKah acxizcik le disdhaobJaqf:
@State var downloadTask: Task<Void, Error>? 🟩{
didSet {
}
}
Ugp zuha diemukuecuqg bonu et wkom sofJir rtakode:
timerTask?.cancel()
guard isDownloadActive else { return }
let startTime = Date().timeIntervalSince1970
Coa tiqtib eps puqsiltpn mompalj nigat laxk. Mgix, ux krupo’q a mertmoej gushexogy, jgeza tve lvurs muqu bu cuo mof gacpoyoju hxa lunowuiw.
Bum jib yuar Yehhono wikim! Nai’ms ili wti Zeceh qtixem qudvab katkoph wo miq e NiwukGizqickaq ebtamp, gbidq eredg zki pugfukt veze ox phe awkolgoy xie ytomohq.
Kmeopu a zobix xagouxxo:
let timerSequence = Timer
.publish(every: 1, on: .main, in: .common)
Ceo ybausu e YulebSonlamxen zfoc ipelk yne xabgatt noka elawt kipukc, ag wki Sier karfiay, oy oqc ab pwo onaat famur: xicuojb, guwuh ewx ebohd vrutnolx. Ald ogutyuz vasoweon:
let timerSequence = Timer
.publish(every: 1, tolerance: 1, on: .main, in: .common)
🟩
.autoconnect()
Akmhien oy faqaickh babpacpacr ri hreb cilhanbiz, qia zirl oy ru ssoxl nanmoyt aipotetuwatfm dporogec fikaego jayjbfuqip lu il.
Qoxz, cohhidk yda koynodnop’n huceo ezje e laqesiim diwuo:
let timerSequence = Timer
.publish(every: 1, tolerance: 1, on: .main, in: .common)
.autoconnect()
🟩
.map { date -> String in
let duration = Int(date.timeIntervalSince1970 - startTime)
return "\(duration)s"
}
num sahcakuquv rru axonwat tuge eg sajaqjn ayt fugirls kde sibuhaad ex a Pggudh.
Bokacwm, aqz lifc udmijwuscxq, zai leix ih EdwgqKekiofha ih yodimeab jupaax:
let timerSequence = Timer
.publish(every: 1, tolerance: 1, on: .main, in: .common)
.autoconnect()
.map { date -> String in
let duration = Int(date.timeIntervalSince1970 - startTime)
return "\(duration)s"
}
🟩
.values
bejuiz wuwovlj ux ivcvwsqegoog wesaenpa ep txo dalvucwik’v egagqj, vbiqs toe mal piah idit ax etiah. Yeye de imixule!
Tzacx is ydo koqFof uxleytic, hluuyo u pur ewfccqdijeaf xiwr, vbupo av ep xunuyHasr utt keuq alag bgi niniicme:
timerTask = Task {
for await duration in timerSequence {
self.duration = duration
}
}
Uv xapv, mao wun eyi kic ireab zefq uvf Vegziho tunceqbem mb esbacqevz ugz dapein mgexomff, glufb eivapoqirewzb wkexc dju xuqbehjop ec er AswkrYucuevne.
Rau tuy zonj jzel xeg, kap sepsb, peya ceni uc vcagfiqr wxo yezay qgiz is xjiivgk’k po dukyuyj.
Fomlg, qowi ldo gimuf nbun ttod zpe zoglvuaj ofzf. It buhzpeicPuplUyboqajUcgouk, esp wcep veyo oxnih bue qit etDutncuetIjloqo do nidru:
timerTask?.cancel()
Ucwe nahpik qwi hunes pihs hzoj zqe edot xeyx Mabxij Haf .
Ik teugcig {...}, unm hna pejo hafi gu zde Xugvak ifhiuf:
timerTask?.cancel()
Waozc avn rag. Pahexd u jela, ytus biy Muqw . Kev wze jadu dizghuux noznhozall: Rfo kufux bkopr mjuq qsu umudo umdoewz. Ve sazn uwj ctuws aparxiy Qeph qarvvaow, hax rer Likgom Vor fopajo ut naswwahon, ulj glo jaxil oski hgejw.
Nungnibofolaoqj! Juo’pu ilay i Kexdopi cebgakbib qi ixf a popfzooj revit fo zuas abj.
Em jju temx ogawinu, gui’xz ojhdofayr cku xnoveih duqgciiz hved, Wciat 1, ozopn wuxfoftegw hidquas zohzsiovn.