Tsim daim ntaub ntawv rau iOS: pib qhov twg?

Nrog txhua dua hnub tsub kom lub xov tooj ntawm cov neeg uas xav kom kawm tau li cas los tsim qhov kev pab cuam. Tom qab sau cov ntaub ntawv nyob rau hauv lub network los rau lawv lub tswv yim tias lub feem ntau pheej yog cov kev loj hlob ntawm daim ntaub ntawv rau iOS no - kua operating system. Nyob rau hauv qhov tseeb, npau suav - qhov no yog ib tug, thiab programming - lwm. Sau koj tus kheej daim ntawv thov yog tsis yooj yim. Tab sis tsis fantastically nyuaj. Yuav ua li cas koj yuav tsum ua li cas?

programming lus

Yuav kom sau ib qho kev pab rau ib qho platform, koj yuav tsum siv ib txoj kev programming lus. Tsim daim ntaub ntawv rau iOS no thiab Android txawv. Yog hais tias lub platform los ntawm lub "Google" koj yuav tsum xaiv lub Java hom lus, rau iOS no xaiv ntawm hom phiaj-C thiab Swift. Rau ib ntev lub sij hawm los tsim rau iOS no platform nws twb nqa tawm tsuas nrog kev pab los ntawm hom phiaj-C programming lus. Txawm tias muaj tseeb hais tias nws yog ntau xyoo, nws yog tseem ua nrog thiab yog siv los ntawm ib tug loj tus naj npawb ntawm developers. Tab sis nws tsis zoo - nws yog ib tug siab barrier rau koj nkag mus.

Txij li thaum lub ntsiab qhov chaw ntawm cov nyiaj yog cov kua ntawm nws daim ntawv thov khw, neeg ua hauj lwm txaus siab nyob rau hauv ntau pab tau thiab nthuav cov cuab yeej. Vim li no, cov kev sib tham rau developers, uas qhia rau peb hais txog cov kev hloov nyob rau hauv lub operating systems. Nyob rau hauv 2014, lub developers tsom tshiab programming lus Swift, uas yog tsim daim ntaub ntawv rau iOS no. Swift yog ib qho yooj yim kawm, vim hais tias nws muaj ib tug heev yooj yim syntax thiab ntseeg tau ntaus. Rau cov neeg uas xav mus kawm kom lawv muaj ntaub ntawv sau npe rau iOS no muaj cov lus no fits zoo heev.

Yuav ua li cas yog yuav tsum tau mus pib

Nyob rau hauv tas li ntawd mus yooj yim kev txawj ntse ntawm lub cajmeem, koj yuav tsum muaj cov nram qab no:

• los yog phau computer nrog OSX operating system on board;
• txoj kev loj hlob cheeb tsam Xcode, uas yog pub dawb.

Cov teeb no enables daim ntaub ntawv khiav nyob rau hauv ib tug tshwj xeeb simulator ncaj qha rau ntawm lub computer. Tiam sis peb yuav tsum dais nyob rau hauv lub siab hais tias nyob rau hauv lub neej yav tom ntej tej zaum yuav tau them $ 99 rau txhua txhua xyoo subscription kom tau qhov kev pab cuam developers. Tom qab cov nyiaj them poob yuav tsum tau mus rau:

• tsim los khiav qhov kev pab cuam tsis yog nyob rau hauv lub simulator thiab nyob rau sij pab kiag li lawm;
• muab lub app nyob rau hauv lub khw App khw;
• download tau tshiab version ntawm cov kev loj hlob ib puag ncig thiab iOS no.

Nyob rau hauv tshiab versions ntawm Xcode muaj ib qho kev caij xws li ib tug "sandbox", hu ua Chaw Ua Si. Ntawm no yog lub designer yuav xyaum ua tej yam nrog ib tug tshiab hom lus programming.

Muaj coob tus neeg xav kom pib sau cov kev pab cuam, tab sis kuv xav hais tias nws yog ib yam nyuaj heev. Ntawm cov hoob kawm, nyob rau hauv thiaj li yuav ua ib tug kws, koj yuav tsum muaj ib tug ntau ntawm kev txawj ntse thiab loj heev kev tom qab lawv. Tab sis nyob rau hauv thiaj li yuav tsim ib tug me me daim ntawv thov, nws tsis yog tsim nyog yuav tsum tau ib tug kws.

Yuav ua li cas mus pib tsim daim ntaub ntawv rau iOS no thiab Android? Kawm yuav siv sij hawm qhov chaw nyob rau hauv xyaum. Yog li ntawd, nws yog tsim nyog los pib nrog. Muaj ntau theories - yog tsis yeej ib txwm zoo. Tom qab tag nrho, yog ib tug neeg yuav nyeem los ntawm cover kom npog kaum phau ntawv nyob rau lub cajmeem, computer programmer, nws yuav tsis. Peb yuav tsum tau ua.

Chaw Ua si

Qhov no "sandbox" - qhov no yog ib tug zoo kawg puag ncig kawm programming lus. Raws li nws zoo? Tus neeg siv nkag ib tug kab ntawm code thiab tam sim ntawd pom lub txiaj ntsim ntawm tiav. Thaum nws yuav paub tseeb hais tias daim ntawv sau fragment ua hauj lwm li nws yuav tsum, nws yuav tsuas yuav pauv mus rau hauv peb tes num. Nrog kev pab los ntawm lub "sandbox" yuav kom daws tau tej kev pab raws qib raws li:

• txoj kev loj hlob ntawm hom lus programming syntax;
• kev txhim kho programming kev txawj ntse nrog rau cov kev pab los ntawm thwmsim nrog tus tshiab API;
• qhov kev siv ntawm tej yam yooj yim xam suav;
• txoj kev loj hlob ntawm ib tug tshiab algorithm thiab saib nws txhua khiav mus.

Tsim daim ntaub ntawv rau iOS: pib qhov twg

Qhov kev tshawb xav - nws yog yeej zoo, tab sis, raws li hais ua ntej lawm, yuav siv sij hawm xyaum. Nyob rau hauv thiaj li yuav tau ntsib nrog rau cov "sandbox", koj yuav tau khiav Xcode txoj kev loj hlob cheeb tsam. Tom qab pib lub neeg siv yuav pom ib tug qhov rais, uas xav tsim ib qhov project tshiab los yog pib Chaw Ua Si. Kuv xav tau ib tug thib ob point. Tam sim no koj yuav tsum tau tuaj mus nrog ib tug lub npe thiab txuag lub "sandbox" nyob rau hauv tej qhov chaw uas yoojyim rau koj lub computer. Los ntawm txoj kev, txoj kev loj hlob ntawm daim ntaub ntawv rau iOS no rau lub qhov rais yog tseem tau, tab sis, ces yuav tsum daws tau ib tug ntau ntawm teeb meem. Qhov no installation ntawm pirated operating system, thiab hloov ib qho tseem ceeb cov ntaub ntawv, thiab ntau kab thiab tsawg feempua sibtsoo ua.

Thaum koj tau txais kev cawmdim nws yuav tsum launched rau tib Chaw Ua Si, uas yog yuav tsum tau.

Thaum xub thawj siab ib muag, muaj yog tsis muaj dab tsi interesting. Tab sis nws yog tsim nyog los nkag rau koj cov code zoo li yuav hloov tam sim ntawd.

Rau starters, koj muaj peev xwm sim sau hauv qab no:

var z = 3

rau var y = 0; y <10; ++ y {

z + = z * y

}

z

println ( "tshwm sim: (z)")

Tom qab no "sandbox" yuav hloov nws cov tsos. Nyob rau hauv txoj cai kem (tus tau vaj huam sib luag) qhia tau hais tias qhov tseem ceeb rau txhua txoj kab, uas yog tau tom qab tiav. Tsis tas li ntawd nyob rau hauv txoj cai kem, koj yuav tau xaiv mus tso saib lub sij hawm bar, uas tso cai rau koj mus taug qab hloov lub sij hawm ntawm lub qhia. Nws kuj qhia tau hais tias cov console tso zis rau hauv cov ntawv nyeem uas yuav tso zis los ntawm qhov kev pab cuam.

commenting code

Tsim daim ntaub ntawv rau iOS no, raws li zoo raws li rau lwm yam platforms, tsis yog tsis muaj cov lus, uas yog tsim nyog los xyuas kom meej tias tus tsim tawm yog yooj yim rau next nyob rau hauv lub code. Comments - kab no yog tsis quav ntsej li thaum lub sij hawm qhov kev pab cuam tiav. Lawv yuav ua tau tag nrho ob qho tib-line thiab multiline.

variables

Yog li, kev siv cov ntaub ntawv sau nyob rau hauv ib tug programming lus. Pib tej lus nce mus nce los tivthaiv. Tsim daim ntaub ntawv rau iOS no thiab Android yog tsis tau tsis tau cov kev siv ntawm cov tsiaj ntawv. Raws li lub npe implies, nws yog ib lub taub ntim, uas muaj cov nce mus nce los nqis. Txhua nce mus nce los yuav tsum muaj ib tug tshwj xeeb lub npe thiab yuav muaj ob qho tag nrho numeric thiab cov ntawv nyeem tseem ceeb. Yog hom lus programming Swift variables txhais siv cov var lo lus tseem ceeb thiab cia. Nyob rau hauv lub thib ob cov ntaub ntawv, ib tug nce mus nce los yuav hloov tsis tau thiab yuav tsum tau initialized ntawm qhov kev tshaj tawm. Nyob rau hauv thawj cov ntaub ntawv, lub nce mus nce los yog initialized tam sim ntawd ua ntej yuav siv.

Txhua nce mus nce los muaj ib co hom. Qhov no tej zaum yuav ib txoj hlua, floating taw tes tus xov tooj (fractional) boolean qhov tseem ceeb (tseeb thiab cuav).

Tso zis tau

Cov tshwm sim ntawm qhov kev pab cuam yog tso tawm nyob rau hauv lub console. Yuav ua li cas yog nws? Qhov no yog dab tsi muab rau cov neeg siv kev sis raug zoo nrog lub computer. Yog li, tso zis hauv lub console siv yuav tsum tau hu ua ib tug saib thiab cov tswv yim console - keyboard. Tam sim no lub ntsiab lus ntawm cov nqe lus me ntsis tau hloov. Yog li ntawd-hu ua mos lub qhov rais rau hais kom cov tswv yim thiab cov zis. Tsim daim ntaub ntawv rau iOS nquag demands tshem ntawm tej ntaub ntawv. Ua li no nyob rau hauv Swift lus muab sau kom ua thiab println. Tus thawj raws ntawm tus thib ob uas txiav pib ib txoj kab tshiab.

zog

Cov nram qab no yooj yim lub tswv yim nyob rau hauv lub cajmeem - functions. Nws yog ib tug tej yam ib theem zuj zus ntawm kev uas ua kom ua tau ib tug cov hauj lwm. Txhua muaj nuj nqi yuav noj tej nqi, thiab xa rov qab tshwm sim. Yuav kom siv cov qauv no, koj yuav tsum xub tshaj tawm nrog cov lo lus tseem ceeb func. Tom qab nws muaj lub npe thiab qhov koov. Yog hais tias ib tug nqi yog yuav tsum tau xa rov qab, tom qab lub nkhaus qhia nws hom. Yog hais tias rov qab los tus nqi yog tsis tam sim no, lub hom yog tsis sau tseg qhia, los yog sau tias "npliag" hom - tsis muaj dabtsis. Nyob rau hauv koov yog qhov tseem ceeb uas cov kev ua yuav siv sij hawm. Yuav kom hu rau ib tug muaj nuj nqi yuav qhia tau lub npe thiab qhov tseem ceeb rau cov lus.

Koj yuav ua tau lub parameter lub npe nyob rau hauv cov kev ua hu tau tas qhia. Yuav kom qhov no kawg, nws yog framed los ntawm ib lub cim ntawm "daim phiaj".

Yog li ntawd koj yuav tau sau tej pab zog uas ua tau, piv txwv li, los xam txauv nqi, hloov ib chav tsev ntawm kev ntsuas mus rau lwm lub. Txhua lub sij hawm muaj ib tug yuav tsum tau siv lawv, cia li txaus hu rau cov kev tso cai, es tsis txhob sau cov code los ntawm kos.

Yuav ua li cas tam sim no?

Yog li ntawd, raws li tau pom los ntawm cov saum toj no, txoj kev loj hlob ntawm daim ntaub ntawv rau iOS no nrog lawv ob txhais tes yuav zoo yuav nyob rau hauv rog ntawm txhua. Qhov loj tshaj plaws - mus kawm txog cov qauv ntawm programming lus, kom tau ntsib nrog rau cov kev loj hlob ib puag ncig thiab ib tug ntau ntawm kev xyaum thiab feem ntau. Ces tsis ua li yuav pab tau kom muaj kev nruam ntej. Tab sis raws li tau piav no - nws yog nyuam qhuav pib. Ntxiv nyob rau hauv lub programming ntiaj teb no yuav tsum yog ib tug ntau ntawm nthuav, complex, fascinating. Nws yuav nco ntsoov cia kom koj lub siab ntse, los tsim ib yam dab tsi tshiab thiab zoo nyob. Tom qab tag nrho, kua machines yog siv thoob ntiaj teb. Yog li ntawd, koj daim ntawv thov yuav tsum tau soj ntsuam lab tus tib neeg.