{"id":99353,"date":"2021-03-05T04:22:37","date_gmt":"2021-03-05T02:22:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12"},"modified":"2021-03-05T04:22:37","modified_gmt":"2021-03-05T02:22:39","slug":"google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12","title":{"rendered":"A Google bemutatta a Flutter 2 keretrendszert \u00e9s a Dart 2.12 nyelvet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Google bemutatta a Flutter 2 felhaszn\u00e1l\u00f3i fel\u00fclet keretrendszert, amely a projekt \u00e1talakul\u00e1s\u00e1t jelenti a mobilalkalmaz\u00e1sok fejleszt\u00e9s\u00e9re szolg\u00e1l\u00f3 keretrendszerb\u0151l egy \u00e1ltal\u00e1nos keretrendszerr\u00e9, amely b\u00e1rmilyen t\u00edpus\u00fa program, bele\u00e9rtve az asztali rendszerekre \u00e9s webalkalmaz\u00e1sokra sz\u00e1nt programokat, l\u00e9trehoz\u00e1s\u00e1t lehet\u0151v\u00e9 teszi. <\/p>\n

A Flutter alternat\u00edvak\u00e9nt m\u0171k\u00f6dik a React Native-hoz k\u00e9pest, \u00e9s lehet\u0151v\u00e9 teszi, hogy egyetlen k\u00f3dalap alapj\u00e1n alkalmaz\u00e1sokat ind\u00edtsunk k\u00fcl\u00f6nb\u00f6z\u0151 platformokon, k\u00f6zt\u00fck iOS, Android, Windows, macOS \u00e9s Linux, valamint b\u00f6ng\u00e9sz\u0151ben fut\u00f3 alkalmaz\u00e1sokat. A Flutter 1-en kor\u00e1bban \u00edrt mobilalkalmaz\u00e1sok a Flutter 2-re val\u00f3 \u00e1t\u00e1ll\u00e1s ut\u00e1n, a k\u00f3d \u00fajra\u00edr\u00e1sa n\u00e9lk\u00fcl, alkalmaz\u00e1sokk\u00e1 alak\u00edthat\u00f3k asztalon \u00e9s a weben. <\/p>\n

A Flutter k\u00f3dj\u00e1nak f\u0151 r\u00e9sze Dart nyelven van megval\u00f3s\u00edtva, m\u00edg az alkalmaz\u00e1sok futtat\u00e1s\u00e1hoz sz\u00fcks\u00e9ges runtime motor C++-ban \u00edr\u00f3dott. Alkalmaz\u00e1sok fejleszt\u00e9sekor a Flutter nat\u00edv nyelve mellett, a Dart Foreign Function interf\u00e9sz seg\u00edts\u00e9g\u00e9vel C\/C++ k\u00f3d is h\u00edvhat\u00f3. A kiv\u00e1l\u00f3 teljes\u00edtm\u00e9ny a c\u00e9lplatformokhoz k\u00e9sz\u00fclt g\u00e9pi k\u00f3dra t\u00f6rt\u00e9n\u0151 ford\u00edt\u00e1s r\u00e9v\u00e9n \u00e9rhet\u0151 el. E mellett, a programot nem sz\u00fcks\u00e9ges minden egyes m\u00f3dos\u00edt\u00e1s ut\u00e1n \u00fajraford\u00edtani \u2014 a Dart forr\u00f3 \u00fajraind\u00edt\u00e1si m\u00f3dja lehet\u0151v\u00e9 teszi, hogy m\u00f3dos\u00edt\u00e1sokat v\u00e9gezz\u00fcnk a fut\u00f3 alkalmaz\u00e1sban \u00e9s azonnal \u00e9rt\u00e9kelj\u00fck az eredm\u00e9nyt. <\/p>\n

A Flutter 2 teljes k\u00f6r\u0171 t\u00e1mogat\u00e1st \u00edg\u00e9r a webalkalmaz\u00e1sok k\u00e9sz\u00edt\u00e9s\u00e9hez, amely alkalmas a munkai bevezet\u00e9sekhez. H\u00e1rom f\u0151 alkalmaz\u00e1si forgat\u00f3k\u00f6nyvet eml\u00edtenek a Flutter Web sz\u00e1m\u00e1ra: f\u00fcggetlen webalkalmaz\u00e1sok (PWA, Progressz\u00edv Webalkalmaz\u00e1sok) fejleszt\u00e9se, egyoldalas webalkalmaz\u00e1sok (SPA, Egyoldalas alkalmaz\u00e1sok) l\u00e9trehoz\u00e1sa \u00e9s mobilalkalmaz\u00e1sok webalkalmaz\u00e1sokk\u00e1 alak\u00edt\u00e1sa. A webfejleszt\u00e9s eszk\u00f6zeinek jellemz\u0151i k\u00f6z\u00f6tt eml\u00edtik a 2D \u00e9s 3D grafikus renderel\u00e9s gyors\u00edt\u00e1s\u00e1t, az elemek rugalmas elrendez\u00e9s\u00e9t a k\u00e9perny\u0151n, valamint a WebAssembly-be ford\u00edthat\u00f3 CanvasKit renderel\u0151motort. <\/p>\n

A desktop alkalmaz\u00e1sok t\u00e1mogat\u00e1sa b\u00e9tatesztel\u00e9si f\u00e1zisban van, \u00e9s ebben az \u00e9vben stabiliz\u00e1lj\u00e1k az egyik k\u00f6vetkez\u0151 kiad\u00e1sban. A Flutter fejleszt\u00e9si t\u00e1mogat\u00e1s\u00e1r\u00f3l a Canonical, a Microsoft \u00e9s a Toyota besz\u00e9lt. A Canonical a Flutter-t v\u00e1lasztotta a saj\u00e1t alkalmaz\u00e1sainak f\u0151 keretrendszerek\u00e9nt, \u00e9s ezt alkalmazza az \u00faj Ubuntu telep\u00edt\u0151 fejleszt\u00e9s\u00e9n\u00e9l is. A Microsoft a Flutter-t alkalmazta hajl\u00e9kony k\u00e9perny\u0151vel rendelkez\u0151 eszk\u00f6z\u00f6kh\u00f6z, mint a Surface Duo. A Toyota a Flutter-t tervezi haszn\u00e1lni az aut\u00f3s inform\u00e1ci\u00f3sz\u00f3rakoztat\u00f3 rendszerekhez. A Flutter alapjain \u00e9p\u00fcl a Google \u00e1ltal kifejlesztett Fuchsia mikrokernel oper\u00e1ci\u00f3s rendszer felhaszn\u00e1l\u00f3i fel\u00fclete is.

\"A<\/center> <\/p>\n

A Dart 2.12 programoz\u00e1si nyelv kiad\u00e1sa is egyidej\u0171leg megjelent, amely folytatja a Dart 2 radik\u00e1lisan \u00e1talak\u00edtott \u00e1g\u00e1nak fejleszt\u00e9s\u00e9t. A Dart 2 elt\u00e9r az eredeti Dart nyelvt\u0151l a statikus t\u00edpusellen\u0151rz\u00e9s alkalmaz\u00e1s\u00e1val (a t\u00edpusok automatikusan meghat\u00e1rozhat\u00f3k, \u00edgy a t\u00edpusok megad\u00e1sa nem k\u00f6telez\u0151, de a dinamikus t\u00edpusellen\u0151rz\u00e9st m\u00e1r nem haszn\u00e1lj\u00e1k, \u00e9s az eredetileg meghat\u00e1rozott t\u00edpusot r\u00f6gz\u00edtik a v\u00e1ltoz\u00f3hoz \u00e9s k\u00e9s\u0151bb szigor\u00fa t\u00edpusellen\u0151rz\u00e9s \u00e9rv\u00e9nyes\u00fcl). <\/p>\n

A kiad\u00e1s megjegyz\u00e9sre m\u00e9lt\u00f3 a null \u00e9rt\u00e9k zabezpe\u010duj re\u017eim stabiliz\u00e1l\u00e1sa (null safety), amely seg\u00edt elker\u00fclni a programok \u00f6sszeoml\u00e1s\u00e1t, amelyet az okoz, hogy megpr\u00f3b\u00e1lunk v\u00e1ltoz\u00f3kat haszn\u00e1lni, amelyek \u00e9rt\u00e9ke nem defini\u00e1lt \u00e9s nullra van \u00e1ll\u00edtva. A rendszer lehet\u0151v\u00e9 teszi, hogy a v\u00e1ltoz\u00f3knak ne lehessenek nem defini\u00e1lt \u00e9rt\u00e9keik, hacsak kifejezetten nem kapnak null \u00e9rt\u00e9ket. A rendszer szigor\u00faan figyelembe veszi a v\u00e1ltoz\u00f3k t\u00edpusait, ami lehet\u0151v\u00e9 teszi a ford\u00edt\u00f3 sz\u00e1m\u00e1ra, hogy tov\u00e1bbi optimaliz\u00e1l\u00e1sokat alkalmazzon. A t\u00edpusok megfelel\u0151s\u00e9g\u00e9t a ford\u00edt\u00e1si szakaszban ellen\u0151rzik, p\u00e9ld\u00e1ul ha megpr\u00f3b\u00e1lunk null \u00e9rt\u00e9ket hozz\u00e1rendelni egy olyan v\u00e1ltoz\u00f3hoz, amelynek t\u00edpusa nem enged\u00e9lyezi a nem defini\u00e1lt \u00e1llapotot, mint p\u00e9ld\u00e1ul az int, hiba\u00fczenet fog megjelenni. <\/p>\n

A Dart 2.12 m\u00e1sik fontos fejleszt\u00e9se a FFI k\u00f6nyvt\u00e1r stabil megval\u00f3s\u00edt\u00e1sa, amely lehet\u0151v\u00e9 teszi a nagy teljes\u00edtm\u00e9ny\u0171 k\u00f3d l\u00e9trehoz\u00e1s\u00e1t, amely a C nyelv API-j\u00e1hoz val\u00f3 kapcsol\u00f3d\u00e1sra szolg\u00e1l. Teljes\u00edtm\u00e9ny- \u00e9s m\u00e9retoptimaliz\u00e1l\u00e1sok t\u00f6rt\u00e9ntek. \u00daj fejleszt\u0151i eszk\u00f6z\u00f6k \u00e9s k\u00f3dprofiloz\u00f3 rendszer k\u00e9sz\u00fclt a Flutter haszn\u00e1lat\u00e1val \u00edrt k\u00f3dokhoz, valamint \u00faj pluginek a Dart \u00e9s Flutter alkalmaz\u00e1sok fejleszt\u00e9s\u00e9hez az Android Studio\/IntelliJ \u00e9s VS Code sz\u00e1m\u00e1ra.

\"A<\/center>
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f Flutter 2, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0437\u043d\u0430\u043c\u0435\u043d\u043e\u0432\u0430\u043b \u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0438\u0437 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a\u0430 \u0434\u043b\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043b\u044e\u0431\u044b\u0445 \u0442\u0438\u043f\u043e\u0432 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b \u0434\u043b\u044f \u043d\u0430\u0441\u0442\u043e\u043b\u044c\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0438 web-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f. Flutter \u0440\u0430\u0441\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u0430 React Native \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043e\u0434\u043d\u043e\u0439 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u044b \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0440\u0430\u0437\u043d\u044b\u0445 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c, \u0432\u043a\u043b\u044e\u0447\u0430\u044f iOS, Android, […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":99354,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-99353","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Google bemutatta a Flutter 2 keretrendszert \u00e9s a Dart 2.12 nyelvet | ProHoster","description":"A Google bemutatta a Flutter 2 felhaszn\u00e1l\u00f3i fel\u00fclet-\u00e9p\u00edt\u0151 keretrendszert, amely a projekt mobilalkalmaz\u00e1sok fejleszt\u00e9s\u00e9re szolg\u00e1l\u00f3 keretrendszerb\u0151l egy univerz\u00e1lis keretrendszerr\u00e9 v\u00e1ltozott.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a Flutter 2 \u0438 \u044f\u0437\u044b\u043a Dart 2.12 | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f Flutter 2, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0437\u043d\u0430\u043c\u0435\u043d\u043e\u0432\u0430\u043b \u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0438\u0437 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a\u0430 \u0434\u043b\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2021-03-05T02:22:39+00:00","article:modified_time":"2021-03-05T02:22:39+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"99353","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-05 02:31:39","updated":"2022-10-01 23:29:04","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/99353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=99353"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/99353\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media\/99354"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=99353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=99353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=99353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}