{"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\/es\/blog\/news\/google-predstavil-frejmvork-flutter-2-i-yazyk-dart-2-12","title":{"rendered":"Google present\u00f3 el marco Flutter 2 y el lenguaje Dart 2.12","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>La empresa Google present\u00f3 el marco de construcci\u00f3n de interfaces de usuario Flutter 2, que marc\u00f3 la transformaci\u00f3n del proyecto de un marco para el desarrollo de aplicaciones m\u00f3viles a un marco universal para crear cualquier tipo de programas, incluyendo programas para sistemas de escritorio y aplicaciones web.     <\/p>\n<p>Flutter se considera una alternativa a React Native y permite, a partir de una sola base de c\u00f3digo, lanzar aplicaciones para diferentes plataformas, incluyendo iOS, Android, Windows, macOS y Linux, as\u00ed como aplicaciones que se ejecutan en navegadores. Las aplicaciones m\u00f3viles previamente escritas en Flutter 1 podr\u00e1n adaptarse para trabajar en escritorio y web sin necesidad de reescribir el c\u00f3digo al migrar a Flutter 2.        <\/p>\n<p>La mayor parte del c\u00f3digo de Flutter est\u00e1 implementado en el lenguaje Dart, y el motor de tiempo de ejecuci\u00f3n para ejecutar aplicaciones est\u00e1 escrito en C++. Al desarrollar aplicaciones, adem\u00e1s del lenguaje nativo de Flutter, Dart, se puede usar la interfaz Dart Foreign Function para invocar c\u00f3digo en C\/C++. Un alto rendimiento de ejecuci\u00f3n se logra gracias a la compilaci\u00f3n de aplicaciones en c\u00f3digo m\u00e1quina para plataformas espec\u00edficas. Adem\u00e1s, no es necesario recompilar el programa despu\u00e9s de cada cambio: Dart ofrece un modo de recarga en caliente que permite realizar cambios en la aplicaci\u00f3n en funcionamiento y evaluar inmediatamente los resultados.    <\/p>\n<p>En Flutter 2 se declara un soporte completo para la creaci\u00f3n de aplicaciones web, aptas para implementaciones en producci\u00f3n. Se mencionan tres escenarios principales para el uso de Flutter para web: desarrollo de aplicaciones web aisladas (PWA, Progressive Web Apps), creaci\u00f3n de aplicaciones web de una sola p\u00e1gina (SPA, Single Page Apps) y conversi\u00f3n de aplicaciones m\u00f3viles en aplicaciones web. Entre las caracter\u00edsticas de las herramientas de desarrollo para web se destacan los mecanismos de aceleraci\u00f3n de renderizado de gr\u00e1ficos 2D y 3D, la disposici\u00f3n flexible de los elementos en pantalla y el motor de renderizado CanvasKit compilado en WebAssembly.      <\/p>\n<p>El soporte para aplicaciones de escritorio se encuentra en la fase de pruebas beta y se estabilizar\u00e1 este a\u00f1o en uno de los pr\u00f3ximos lanzamientos. Canonical, Microsoft y Toyota han anunciado su apoyo al desarrollo utilizando Flutter. Canonical ha elegido Flutter como el marco principal para sus aplicaciones y lo aplica tambi\u00e9n en el desarrollo de un nuevo instalador para Ubuntu. Microsoft ha adaptado Flutter para dispositivos plegables con m\u00faltiples pantallas, como el Surface Duo. Toyota planea utilizar Flutter para sistemas de infoentretenimiento en autom\u00f3viles. La interfaz personalizada del sistema operativo de microkernel Fuchsia, desarrollado por Google, tambi\u00e9n est\u00e1 basada en Flutter.     <center><img decoding=\"async\" alt=\"Google present\u00f3 el marco Flutter 2 y el lenguaje Dart 2.12\" src=\"\/wp-content\/uploads\/2021\/03\/00588e230bc64b7de46ec4794b1566cf.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>Simult\u00e1neamente se public\u00f3 el lanzamiento del lenguaje de programaci\u00f3n Dart 2.12, que contin\u00faa el desarrollo de la rama radicalmente redise\u00f1ada de Dart 2. Dart 2 se diferencia de la versi\u00f3n original del lenguaje Dart por el uso de una tipificaci\u00f3n est\u00e1tica fuerte (los tipos pueden inferirse autom\u00e1ticamente, por lo que la especificaci\u00f3n de tipos no es obligatoria, pero la tipificaci\u00f3n din\u00e1mica ya no se utiliza y el tipo inferido se asigna a la variable, aplic\u00e1ndose posteriormente una verificaci\u00f3n de tipo estricta).    <\/p>\n<p>Esta versi\u00f3n se destaca por la estabilizaci\u00f3n del modo de uso seguro del valor 'Null' (null safety), lo que permite evitar fallos causados por intentos de utilizar variables cuyo valor no est\u00e1 definido y se establece en 'Null'. El modo implica que las variables no pueden tener valores indefinidos a menos que se les asigne expl\u00edcitamente el valor null. En este modo, se consideran estrictamente los tipos de variables, lo que permite al compilador aplicar optimizaciones adicionales. La correspondencia de tipos se verifica en la etapa de compilaci\u00f3n; por ejemplo, en caso de intentar asignar el valor 'Null' a una variable de un tipo que no permite un estado indefinido, como 'int', se generar\u00e1 un error.     <\/p>\n<p>Otra mejora importante de Dart 2.12 es la implementaci\u00f3n estable de la biblioteca FFI, que permite crear c\u00f3digo de alto rendimiento al que se puede acceder a la API en C. Se han realizado optimizaciones de rendimiento y tama\u00f1o. Se han a\u00f1adido herramientas para desarrolladores y un sistema de perfilado de c\u00f3digo, escritos utilizando Flutter, as\u00ed como nuevos plugins para el desarrollo de aplicaciones en Dart y Flutter para Android Studio\/IntelliJ y VS Code.    <center><img decoding=\"async\" alt=\"Google present\u00f3 el marco Flutter 2 y el lenguaje Dart 2.12\" src=\"\/wp-content\/uploads\/2021\/03\/f52789d30ed7b078ed57d0727e5be8cf.png\" style=\"display:block;margin: 0 auto;\" \/><\/center><br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54701\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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, [&hellip;]<\/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<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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