{"id":25206,"date":"2019-03-12T12:51:37","date_gmt":"2019-03-12T12:51:37","guid":{"rendered":"https:\/\/www.knowband.com\/blog\/?p=25198\/"},"modified":"2019-08-20T09:00:38","modified_gmt":"2019-03-12T12:59:51","slug":"%c2%bfc%c3%b3mo-obtener-datos-de-firebase-en-swift-language-ios","status":"publish","type":"post","link":"https:\/\/www.knowband.com\/blog\/es\/sin-categorizar\/%c2%bfc%c3%b3mo-obtener-datos-de-firebase-en-swift-language-ios\/","title":{"rendered":"\u00bfC\u00f3mo obtener datos de Firebase en Swift Language (iOS)?"},"content":{"rendered":"<h2><strong>Objetivos del blog.<\/strong><\/h2>\n<p>Despu\u00e9s de leer este blog, podremos comprender el proceso para obtener datos de Firebase. Este proceso incluye la instalaci\u00f3n de Firebase SDK y la implementaci\u00f3n de c\u00f3digo para obtener datos de Firebase.<\/p>\n<h3><strong>Pre-requisitos<\/strong><\/h3>\n<p>Necesitamos escribir c\u00f3digo swift para obtener los datos de Firebase. Para esto primero tendremos que crear el proyecto Firebase. Siga los pasos que se indican a continuaci\u00f3n para crear el proyecto Firebase:<\/p>\n<p><strong>1.<\/strong> Visite  <a href=\"https:\/\/console.firebase.google.com\" target=\"_blank\">https:\/\/console.firebase.google.com<\/a><\/p>\n<p><strong>2.<\/strong> Luego tendr\u00e1s que crear el proyecto Firebase haciendo clic en &quot;<strong>A\u00f1adir proyecto<\/strong>bot\u00f3n &quot;<\/p>\n<p><a href=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/add-project-1.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-25199 size-full\" src=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/add-project-1.png\" alt=\"add-project: \u00bfC\u00f3mo obtener datos de Firebase en Swift Language (iOS)?\" width=\"650\" height=\"406\" srcset=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/add-project-1.png 650w, https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/add-project-1-300x187.png 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/a><\/p>\n<p><strong>3.<\/strong> Necesita el archivo GoogleService-Info.plist para iOS SDK, ya que este archivo contiene los detalles del proyecto Firebase que utiliza Firebase SDK.<\/p>\n<p><strong>4.<\/strong> Luego agrega el archivo plist en el proyecto<\/p>\n<p><strong>5.<\/strong> Agregue el siguiente c\u00f3digo antes de la declaraci\u00f3n de retorno dentro de la aplicaci\u00f3n<strong>(_: didFinishLaunchingWithOptions \ud83d\ude42 en el archivo AppDelegate.swift<\/strong><\/p>\n<pre class=\"brush: actionscript3; gutter: true\">FirebaseApp.configure ()<\/pre>\n<p><strong>6.<\/strong> Luego ve a &quot;<strong>base de datos<\/strong>&quot;opci\u00f3n del men\u00fa de la izquierda.<\/p>\n<p><a href=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/Goto-Database.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-25200 size-full\" src=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/Goto-Database.png\" alt=\"goto-database: \u00bfC\u00f3mo obtener datos de Firebase en Swift Language (iOS)?\" width=\"650\" height=\"406\" srcset=\"https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/Goto-Database.png 650w, https:\/\/www.knowband.com\/blog\/wp-content\/uploads\/2019\/03\/Goto-Database-300x187.png 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/a><\/p>\n<p><strong>7.<\/strong> Seleccionar &quot;<strong>Base de datos en tiempo real<\/strong>&quot;y esa es la base de datos del proyecto Firebase. Todos los datos que se almacenan o se recuperan son de esta ubicaci\u00f3n.<\/p>\n<p><strong>8.<\/strong> La configuraci\u00f3n de Firebase est\u00e1 completa. Ahora tendr\u00e1 que descargar Firebase SDK en el swift. Para ello deber\u00e1s instalar los siguientes pods.<\/p>\n<ol>\n<li><strong>pod &#39;Firebase \/ Core&#39; <\/strong><\/li>\n<li><strong>pod &#39;Firebase \/ Base de datos&#39;<\/strong><\/li>\n<\/ol>\n<p>Supongamos que tiene los siguientes datos en la estructura dada en la base de datos de Firebase:<\/p>\n<pre class=\"brush: actionscript3; gutter: true\">\/\/ La ra\u00edz del \u00e1rbol {\/\/ art\u00edculos comestibles &quot;art\u00edculos comestibles&quot;: {\/\/ art\u00edculos comestibles \/ leche &quot;leche&quot;: {\/\/ art\u00edculos comestibles \/ leche \/ nombre &quot;nombre&quot;: &quot;leche&quot;, \/ \/ grocery-items \/ milk \/ addedByUser &quot;addedByUser&quot;: &quot;David&quot;}, &quot;pizza&quot;: {&quot;name&quot;: &quot;Pizza&quot;, &quot;addedByUser&quot;: &quot;Alice&quot;},}}<\/pre>\n<p>Despu\u00e9s de la instalaci\u00f3n exitosa de las c\u00e1psulas, podemos pasar a la parte de codificaci\u00f3n.<\/p>\n<h3><strong>Implementaci\u00f3n de C\u00f3digo<\/strong><\/h3>\n<p>Todos los puntos \/ nodos de datos se utilizan para acceder a los datos de la base de datos Firebase. Creamos referencias a los nodos y luego recuperamos datos de ese nodo. En otras palabras, una referencia de Firebase apunta a una ubicaci\u00f3n en Firebase donde se almacenan los datos. Primero tendremos que crear una referencia al nodo ra\u00edz de la estructura de la base de datos &#8211;<\/p>\n<pre class=\"brush: actionscript3; gutter: true\">let ref = Database.database (). reference (withPath: &quot;grocery-items&quot;)<\/pre>\n<p>o se puede utilizar la siguiente manera:<\/p>\n<pre class=\"brush: actionscript3; gutter: true\">let rootRef = Database.database (). reference () let ref = rootRef.child (&quot;grocery-items&quot;)<\/pre>\n<p>La referencia al nodo secundario que es &quot;leche&quot; se puede crear utilizando el siguiente c\u00f3digo:<\/p>\n<pre class=\"brush: actionscript3; gutter: true\">let milkRef = ref.child (&quot;milk&quot;)<\/pre>\n<p>Se puede adjuntar un oyente as\u00edncrono a una referencia para recuperar datos de Firebase usando <strong>observar (_: con \ud83d\ude42<\/strong> m\u00e9todo. El siguiente c\u00f3digo recuperar\u00e1 los datos y seguir\u00e1 escuchando los cambios de datos en la base de datos. Tan pronto como se realiza cualquier cambio en la base de datos, se recupera la nueva instant\u00e1nea del nodo \/ referencia y obtenemos los datos actualizados tan pronto como se realiza cualquier cambio en la base de datos.<\/p>\n<pre class=\"brush: actionscript3; gutter: true\">ref.observe (.value, con: {snapshot in \/\/ Esta es la instant\u00e1nea de los datos en el momento en la base de datos de Firebase \/\/ Para obtener el valor de la instant\u00e1nea, el usuario snapshot.value imprimimos (snapshot.value como Cualquiera) })<\/pre>\n<p>Luego, los valores de la instant\u00e1nea se pueden analizar y utilizar en la aplicaci\u00f3n. Una gran ventaja de usar <strong>observar<\/strong> m\u00e9todo sobre <strong>observeSingleEvent<\/strong> El m\u00e9todo es que no tiene que llamar a la funci\u00f3n una y otra vez, ya que los datos actualizados se recuperan de la base de datos tan pronto como se modifica cualquier valor en la base de datos.<\/p>\n<h3><strong>Resumen<\/strong><\/h3>\n<p>Ahora deber\u00eda poder obtener los datos de la base de datos de Firebase de forma r\u00e1pida utilizando Firebase SDK.<script data-cfasync=\"false\" src=\"https:\/\/tdns2.gtranslate.net\/tdn-bin\/queue.js\"><\/script><!-- Yandex.Metrika counter for GTranslate --><script data-cfasync=\"false\">(function (d, w, c) { (w[c] = w[c] || []).push(function() { try { w.yaCounter36618640 = new Ya.Metrika({ id:36618640, clickmap:true, trackLinks:true, accurateTrackBounce:true, ut:\"noindex\" }); } catch(e) { } }); var n = d.getElementsByTagName(\"script\")[0], s = d.createElement(\"script\"), f = function () { n.parentNode.insertBefore(s, n); }; s.type = \"text\/javascript\"; s.async = true; s.src = \"https:\/\/mc.yandex.ru\/metrika\/watch.js\"; if (w.opera == \"[object Opera]\") { d.addEventListener(\"DOMContentLoaded\", f, false); } else { f(); } })(document, window, \"yandex_metrika_callbacks\"); <\/script> <noscript><\/p>\n<div><img decoding=\"async\" src=\"https:\/\/mc.yandex.ru\/watch\/36618640?ut=noindex\" style=\"position:absolute; left:-9999px;\" alt=\"\" \/><\/div>\n<p><\/noscript><br \/>\n<!-- delivered by GTranslate v4.8.8 in 171ms visit https:\/\/gtranslate.io --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objetivos del blog. Despu\u00e9s de leer este blog, podremos comprender el proceso para obtener datos de Firebase. Este proceso incluye la instalaci\u00f3n de Firebase SDK y la implementaci\u00f3n de c\u00f3digo para obtener datos de Firebase. Pre-requisitos Necesitamos escribir c\u00f3digo swift para obtener los datos de Firebase. Para esto primero tendremos que crear el proyecto Firebase. [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kbui_enabled":"","footnotes":""},"categories":[],"tags":[2298,9079,7378,9161,7370,9163,10636,16165,9162],"class_list":["post-25206","post","type-post","status-publish","format-standard","hentry","tag-base-de-fuego","tag-caso-antimonopolio-de-google","tag-consejos","tag-ios","tag-lenguaje-rapido","tag-obtencin-de-datos"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u00bfC\u00f3mo obtener datos de Firebase en Swift Language (iOS)? - Knowband Blog | Ecommerce Modules<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.knowband.com\/blog\/es\/sin-categorizar\/\u00bfc\u00f3mo-obtener-datos-de-firebase-en-swift-language-ios\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u00bfC\u00f3mo obtener datos de Firebase en Swift Language (iOS)? - Knowband Blog | Ecommerce Modules\" \/>\n<meta property=\"og:description\" content=\"Objetivos del blog. Despu\u00e9s de leer este blog, podremos comprender el proceso para obtener datos de Firebase. Este proceso incluye la instalaci\u00f3n de Firebase SDK y la implementaci\u00f3n de c\u00f3digo para obtener datos de Firebase. Pre-requisitos Necesitamos escribir c\u00f3digo swift para obtener los datos de Firebase. Para esto primero tendremos que crear el proyecto Firebase. 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