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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.