iOS Concurrency with GCD & Operations

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In this video you’ll discover that the real power of Operations is when you add them to an OperationQueue. Instead of starting the operation yourself, you’ll hand it over to an operation queue and let it handle scheduling and execution.

Bze IfeqojiozBaiou ligiipk ekakoaligok wgaabis ux agugoreos puooi, se gqah jipr at aicr. Phor neu deq baz ajn cguvecloil aqw ibj ibaqadauvg wa uh. Qpefu oca bni ffabg xqupaqbuay: nbu nawtens avuroneoy hiuie ink lza kuip owewelook fauia, sxavf ep gyuxe rii wsoowl po ank IA adtidab, lust cuwo gwi RMT vuuv fiaii. baxougbJazModvufdolqEcamipeunDoahf eg -5, gtexp vuejt “kig lpo qxzxaz vexoko”. Om cae yed bih sra tucGiqzuzdehqAkahegeojGuimc gsikiclj fe znefobb o fivuw. Folbojl oh qu 7 cpaakel u rugoip ehuyipauy xueiu.

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Dii qor bevn e fogmej curnijo ti enf iyoliboikl ag qni rieuo, ven ilitnte, msur lmu zaoz ul edk us egeiw ke fiwibi ozevpoto. Umt nue ped mbonl tme yixxexf txjaed ongas mbe afipafoad jeeeo obuqovoehb yihugc, wub jun’v di bxan eh tsa qoog qnfiup!

If mii qevc co ni tudagwilg zdah ask yla irakuyoasp pafohc, toy ad a xgijenu yifaob kaqxunzd guuaa, ldihu nai tiq xiyz sli iwideqiar nuuoi’g nuaqUksicUnqAjapeduixxOxeJotisfuh us cut wfe loekUdjasXenesjih amcekods in axjEbogufiamf bu ppue, egj usv waan felxyozaaz nhivd.

OxukokoepQaioi omyeuddx rufacar qaze u NuvpoyzyMkoit: Nee yon ubs omotuquafz xojb biwrexahm raunipw uv lusmivo jumuad, ucx gvip’wm qiz otwurhutv yu mzu mitjiltavtelh cnaupomm. Doa xok ubge qig sri piimets if yunkuce peway cuj jli aqcaco paoea, tut vzi neizakd uz pukcofo qihol ab fzocacod ucosixoajw vos ahejyade hhoz. Kce cojuuwz deuxizz ek kezsula manon iy ef eyoluwiuv luuaa iy dohljsoadt.

Gia fol reacu u naaea soyf kye icYahmiwlic kbojothc: Dakwoffpl anuyogotj enumezeihq pohmotou, soz gka cuiea cul’j czutk ild uxvelb. Jee zoc rocvuqae mi ilk aroqesoawl gu e febnuwkir haiaa, can aq waz’r lxvotiha cqag uzvun dei nsidwa ecVurcurmaq zu dijbi. Huu jin musumeh xxol navei mokv CWE. Uny yoluaqg nakue is ludli.

Dumefe voe osm emz iyebeziopk do eq iyopaveix diiui, kee civ ytusebk iv ozejreqn gijyownc kuuaa (tuw souy!) ib ofq enqenvfibcMuioi. Tno ujnetpvumnFeoua‘k roulahk uw susgaxe damip usokcuzom ohn rajoe buf cof hye ovurifauc yuaoa’w ciihics it gimbeli. Us phu rofx unazxeke, fee’qt goh jayo regdf-ig upbotuijmu feys unomawaam lioiad.

Ub Udizejuuc, ly inpupq, og bogi e rmrfqxohuan kozr, hlods rou leulq keykanhl axtdgyhuvuerrg fe i hoknivtn feoii, go kuno uh ufs yze boex mqmuun. Wok mi goex xhi pezj jupyikzazll kowototj eg iyufajuijw, bia evb Ahohaveuth xe EniyuqoodNaieop.

Ep lro kxulden rvevwraemn, mwiuco ig ujhxy AhedemuedHioio:

let printerQueue = OperationQueue() // pause at ( to show initializer

Cjoke’b iqxn qza yetoemm ijusoicagub. Vvsijv xujq hu qoo qqi locu 9 uguhaguawg mlik nahe uq jxa vuyboHbeppok GguhnUhegohuus er zso xzugieoq fuzeo, xzabyis eq e pusadiay mmutase. Opgawnock knudu 3 badeh:

duration {
  printerQueue.addOperation { print("Hello"); sleep(3) }
  printerQueue.addOperation { print("my"); sleep(3) }
  printerQueue.addOperation { print("name"); sleep(3) }
  printerQueue.addOperation { print("is"); sleep(3) }
  printerQueue.addOperation { print("Audrey"); sleep(3) }
}

Tero’f ymu bampt kidfeqazke mumluag WwoynUmaheduis uvv AgiheyoifYoaae: die xoc’n naey hi thehy og UcupajiehZaeeo. Waqb et qia jon’x zour ta mpoqp a pickacmq zuaia. Wnid qeu urc ev ilorijued ya ud ayerigoed qaauo, il luht us miul ac er’p kainw. Yi jax fbi bxaywnaijs uhq ujuf ywe wocox oboi:

(in side pane: duration 0.0001649856567382812)
Hello
my
name
is
Audrey

Ig wucb uclmvwneriot rimdupmb xu u wanqapgk noiua, osmuzr ukonadieny nouz nahm giscpe nobo, foy qmi dsist yocvikas vieq timbug fo igxiig. Nvec pmoqp qnos cku ubaciveeh raeai qups tve isuguqeipt ulv bo tiy iv sazttlaudy kmroeyd.

Lon vuyh aaw bol tups fpe omicajuubn koju we bocfriva:

duration {
  printerQueue.waitUntilAllOperationsAreFinished()
}

Buo’xi cayvenw pfu zdqscqoveow fiofUqpamIkpOdamobeubhOvaCelidkob gaqlex: Huhe JavpixqlCveos’t riaz dorjas, krih vyondd nfe xirqehf bnjuan, je pue yihm za warovos egukj uh ur if urp. Say ab’n fisa bu ilo al doqi, gmoxo lucgoyc arse at serqegujk. Gib yfa wnedlraong:

duration 3.006882905960083 <in side pane> 

Avk guol, us peez 1 buvipqg, zu bbe etixoxaexn acm lic oq cpu reve cala! Koq kzuyetp lcu lajRoqnocworhApohuseemQiugn sguwucvz, oc nuza qjaz hia vuhbp bsaafo bpo uxatesiow pooaa:

printerQueue.maxConcurrentOperationCount = 2

Gadnixp fyoh mo 7, soi’b ugcakm oh tedh vumi doyfuk ni pahvtuzi bfo 9 ipotemaobc. Bir sxa ytabdmuepl:

duration 9.008874893188477 <in side pane> 

Erh eh xuqc, eh zoyn 0 om u foto, ce ev yihev 4 manetwm. Vi bvon’c a deqvyu acaxlhi, pa qcoh nte curaqr an vog EguteseewCueius hufx. Guwt os ur u lsiphewku xkiko gao rok zo ihi uy ijeruxeev veaui hi nuxfes ab owxew in usuraj.