Element iyi Yapindula Kwina Technology
HTML5 ikuphatikizapo chinthu chosangalatsa chotchedwa CANVAS. Ili ndi ntchito zambiri, koma kuti muigwiritse ntchito muyenera kuphunzira JavaScript, HTML, ndi zina CSS.
Izi zimapangitsa chigawo cha CANVAS kukhala chowopsya kwa opanga ambiri, ndipo ndithudi, ambiri amanyalanyaza chinthucho mpaka pali zipangizo zodalirika zopanga zisudzo ndi masewera a CANVAS popanda kudziwa JavaScript.
Kodi ndi HTML5 zotani zomwe zimagwiritsidwa ntchito
Chiganizo cha HTML5 CANVAS chingagwiritsidwe ntchito pazinthu zambiri zomwe kale, munayenera kugwiritsa ntchito zolemba monga Flash kupanga:
- mafilimu amphamvu
- masewera a pa intaneti ndi opanda
- zojambula
- mavidiyo ndi mauthenga omvera
Ndipotu, chifukwa chachikulu chomwe anthu amagwiritsa ntchito chigawo cha CANVAS ndi chifukwa chosavuta kuti awonetsetse tsatanetsatane wa tsamba la webusaiti kukhala webusaiti yogwiritsa ntchito webusaitiyi ndikusintha mawonekedwe awo kukhala pulogalamu yamakono yogwiritsira ntchito mafoni ndi mapiritsi.
Ngati Tili ndi Vuto, Ndichifukwa Chiyani Timafunikira Tchinga?
Mogwirizana ndi malingaliro a HTML5, chigawo cha CANVAS ndi:
"... zotengera zokhala ndi chidaliro cha bitmap, zomwe zingagwiritsidwe ntchito pojambula mafilimu, masewero a masewera, luso, kapena zithunzi zina pa ntchentche."Cholinga cha CANVAS chimakulolani kujambula zithunzi, mafilimu, masewera, luso, ndi zojambula zina pa tsamba la intaneti nthawi yeniyeni.
Mwina mukuganiza kuti titha kuchita kale ndi Flash, koma pali kusiyana kwakukulu pakati pa CANVAS ndi Flash:
- Cholinga cha CANVAS chimaikidwa mu HTML. Malemba omwe amachokera pa izo ali mu HTML kapena mu fayilo yakunja yogwirizana. Izi zikutanthauza kuti chigawo cha CANVAS ndi gawo la zolemba, kapena DOM.
- Kukula ndi fayilo yakunja yokha. Zimagwiritsa ntchito EMBED kapena chinthu chofunikira cha OBJECT kuti chiwonetsedwe, ndipo sichikhoza kugwirizana mwachindunji ndi zinthu zina za HTML. Chifukwa chigawo cha CANVAS chiri gawo la DOM, icho chingagwirizane ndi DOM m'njira zambiri.
- Mwachitsanzo, mukhoza kupanga zojambula zomwe zimasintha pamene gawo lina la tsamba likugwirizanitsidwa ndi - monga mawonekedwe a mawonekedwe omwe akugwiritsidwa. Ndi Flash, zomwe mungathe kuchita zingakhale kuyamba mafilimu a Flash kapena zojambula, koma ndi KODI mungathe kupanga zotsatira zosiyana, ngakhale kuwonjezerapo mawu kuchokera kumtundu wa fomu kupita ku zojambulazo.
- Chinthu cha CANVAS chimathandizidwa ndi makasitomala. Kuti ogwiritsa ntchito agwiritse ntchito Flash, msakatuli wawo ayenera kukhala ndi pulojekitiyi. Izi kawirikawiri zimakhala zovuta kwa anthu ambiri chifukwa cha kusinthasintha kwa Flash kusakhalitsa kapena kuti kayendedwe kawo kokha sikanachirikiza icho.
- Zikadakhala kuti osatsegula aliyense anali ndi pulojekitiyi, koma izi sizinali choncho, ndipo ambiri amachotsa plugin chifukwa cha mavuto. Ndiponso, sichipezeka ngakhale pawope lotchuka la iOS.
Kansalu N'kofunika Ngakhale Ngati Simunayambe Kugwiritsa Ntchito Flash
Chimodzi mwa zifukwa zazikulu zomwe zida za CANVAS zimasokonezera ndikuti opanga ambiri akhala akugwiritsa ntchito webusaiti yonse. Zithunzi zingakhale zamoyo, koma zatha ndi GIF, ndipo ndithudi mukhoza kuika kanema pamasamba komanso kachiwiri, ndi kanema kamene kamangokhala pa tsamba ndipo mwina nkuyamba kapena kuima chifukwa cha kuyanjana, koma ndizo zonse.
Chigawo cha CANVAS chimakulolani kuti muwonjezere zochuluka kwambiri pamasamba anu chifukwa tsopano mutha kusintha mafilimu, zithunzi, ndi malemba mwamphamvu ndi chinenero. Chigawo cha CANVAS chimakuthandizani kutembenuzira zithunzi, zithunzi, masati, ndi grafu muzithunzi.
Nthawi Yomwe Mungaganizire Kugwiritsa Ntchito Chingwe Chachidutswa
Omvera anu ayenera kukhala oyamba kulingalira mukasankha ngati mungagwiritse ntchito chigawo cha CANVAS.
Ngati omvera anu akugwiritsa ntchito kwambiri Windows XP ndi IE 6, 7, kapena 8, ndiye kupanga mawonekedwe amphamvu omwe sangakhale opanda pake kuyambira pamene osatsegulawo sakuwathandizira.
Ngati mukumanga mapulogalamu omwe angagwiritsidwe ntchito pa makina a Windows okha, ndiye Flash ingakhale yabwino kwambiri. Mapulogalamu omwe angagwiritsidwe ntchito pa ma PC ndi ma PC akhoza kupindula ndi kugwiritsa ntchito Silverlight.
Komabe, ngati mapulogalamu anu akuyenera kuwonetsedwa pa mafoni (onse ndi Android ndi iOS) komanso makompyuta amakono apamwamba (osinthidwa kuti asinthidwe kumasulira), ndiye kugwiritsa ntchito chigawo cha CANVAS ndi chisankho chabwino.
Kumbukirani kuti kugwiritsa ntchito chinthu ichi kumakupatsani mwayi wosankha zinthu monga zithunzi zowonongeka kwa asakatuli akale omwe samachirikiza.
Komabe, sikulimbikitsidwa kugwiritsa ntchito makina a HTML5 pa chirichonse. Musagwiritse ntchito zinthu monga logo, mutu, kapena kayendetsedwe kazitsulo (ngakhale mukugwiritsa ntchito kuti mukhale ndi gawo limodzi mwa izi zili bwino).
Malinga ndi ndondomekoyi, muyenera kugwiritsa ntchito zinthu zomwe ziri zoyenera kwambiri pa zomwe mukuyesera kuti muzimange. Kotero kugwiritsa ntchito chida cha HEADER pamodzi ndi zithunzi ndi malemba ndizofunikira ku chigawo cha CANVAS cha mutu ndi logo.
Komanso, ngati mukupanga tsamba la intaneti kapena ntchito yomwe yagwiritsidwa ntchito kuti ikhale yogwiritsidwa ntchito pamasewera osagwirizana monga kusindikiza, muyenera kudziwa kuti chigawo cha CANVAS chomwe chatsopano chatsopano sichitha kusindikiza monga mukuyembekezera. Mukhoza kupeza zosindikizidwa zamakono kapena zokhudzana ndi kugwa.