I’m trying to create a scrolling form for a mobile web app using a Famous ScrollView. However, iOS exhibits severe display bugs when scrolling while the keyboard is active. This occurs whether using an InputSurface or embedding an <input>
directly in the Surface HTML.
What’s the best way to achieve a scrollable input form that supports Mobile Safari?
(JSFiddle code replicated below; to see the bug, tap on a text field and then attempt to scroll while keyboard is active.)
Famous.loaded(function () {
var Engine = Famous.Core.Engine;
var Surface = Famous.Core.Surface;
var Scrollview = Famous.Views.Scrollview;
var Transform = Famous.Core.Transform;
var mainContext = Engine.createContext();
var scrollview = new Scrollview();
var surfaces = [];
scrollview.sequenceFrom(surfaces);
var inputhtml = '<div><input type="text" value="test: edit me" /></div>';
for (var i = 0, temp; i < 40; i++) {
temp = new Surface({
content: inputhtml,
size: [undefined, 200],
properties: {
backgroundColor: "hsl(" + (i * 360 / 40) + ", 100%, 50%)",
lineHeight: "200px",
textAlign: "center"
},
index: i
});
temp.pipe(scrollview);
surfaces.push(temp);
}
mainContext.add(scrollview);
});
The issue is that famous scroll view is not truly scrollable , they animate the group so that it looks smooth , and to add the pull to refresh effect.
A solution for this : there is no really a direct and neat solution for this as the iOS keyboard animation will always focus into input and on the other hand famous uses a hidden indicator that works like a scroll bar , which conflicts with the iOS focus algorithm , so the only possible solution is that famous changes the way they animate scrollable view.
Workaround:
Famo.us ScrollView MouseOver - jsFiddle demo
<link rel="stylesheet" type="text/css" href="/css/result-light.css"> <link rel="stylesheet" type="text/css" href="https://rawgit.com/jperl/famous-compiled/e9c12b1fa657820d3f9bad093ea72e8ee2dfec46/dist/lib/famous/core/famous.css"> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script> <script type="text/javascript" src="http://rawgit.com/jperl/famous-compiled/e9c12b1fa657820d3f9bad093ea72e8ee2dfec46/dist/src/4f231991.polyfills.js"></script> <script type="text/javascript" src="https://rawgit.com/jperl/famous-compiled/97f85aaa64af255adfe0407c941e0e859b0759bc/dist/src/804b0adb.main.js"></script> <style> input { font-size: 40px; } </style> <script type="text/javascript"> var observer; window.onload=function(){ Famous.loaded(function () { var Engine = Famous.Core.Engine; var Surface = Famous.Core.Surface; var Modifier = Famous.Core.Modifier; var Scrollview = Famous.Views.Scrollview; var Transform = Famous.Core.Transform; var mainContext = Engine.createContext(); var scrollview = new Scrollview(); var surfaces = []; scrollview.sequenceFrom(surfaces); var inputhtml = '<div><input type="text" value="test: edit me" /></div>'; for (var i = 0, temp; i < 40; i++) { temp = new Surface({ content: inputhtml, size: [undefined, 200], properties: { backgroundColor: "hsl(" + (i * 360 / 40) + ", 100%, 50%)", lineHeight: "200px", textAlign: "center" }, index: i }); temp.pipe(scrollview); surfaces.push(temp); } mainContext.add(scrollview); }); $("body").on("focus","input",function(){Observe($(this));}); $("body").on("blur","input",function(){endObserver();}) } function Observe(event_input) { var target = document.querySelector('.famous-group'); // create an observer instance observer = new MutationObserver(function(mutations) { mutations.forEach(function(mutation) { event_input.blur(); console.log(mutation.oldValue); }); }); // configuration of the observer: var config = { attributes: true, attributeOldValue: true, characterData: true }; // pass in the target node, as well as the observer options observer.observe(target, config); } function endObserver() { observer.disconnect(); } </script> </head> <body> </body> </html>
The live example can be found on my page