I'm trying to display an iframe in my mobile web application, but I'm having trouble restricting the size of the iframe to the dimensions of the iPhone screen. The height and width attributes on the iframe element seem to have no effect, strangely. Surrounding it with a div manages to constrain it, but then I'm unable to scroll within the iframe.
Has anyone tackled iframes in mobile safari before? Any ideas where to start?
Yeah, you can't constrain the iframe itself with height and width. You should put a div around it. If you control the content in the iframe, you can put some JS within the iframe content that will tell the parent to scroll the div when the touch event is received.
like this:
The JS:
setTimeout(function () {
var startY = 0;
var startX = 0;
var b = document.body;
b.addEventListener('touchstart', function (event) {
parent.window.scrollTo(0, 1);
startY = event.targetTouches[0].pageY;
startX = event.targetTouches[0].pageX;
});
b.addEventListener('touchmove', function (event) {
event.preventDefault();
var posy = event.targetTouches[0].pageY;
var h = parent.document.getElementById("scroller");
var sty = h.scrollTop;
var posx = event.targetTouches[0].pageX;
var stx = h.scrollLeft;
h.scrollTop = sty - (posy - startY);
h.scrollLeft = stx - (posx - startX);
startY = posy;
startX = posx;
});
}, 1000);
The HTML:
<div id="scroller" style="height: 400px; width: 100%; overflow: auto;">
<iframe height="100%" id="iframe" scrolling="no" width="100%" id="iframe" src="url" />
</div>
If you don't control the iframe content, you can use an overlay over the iframe in a similar manner, but then you can't interact with the iframe contents other than to scroll it - so you can't, for example, click links in the iframe.
It used to be that you could use two fingers to scroll within an iframe, but that doesn't work anymore.
Update: iOS 6 broke this solution for us. I've been attempting to get a new fix for it, but nothing has worked yet. In addition, it is no longer possible to debug javascript on the device since they introduced Remote Web Inspector, which requires a Mac to use.
If the iFrame content is not yours then the solution below will not work.
With Android all you need to do is to surround the iframe with a DIV and set the height on the div to document.documentElement.clientHeight. IOS, however, is a different animal. Although I have not yet tried Sharon's solution it does seem like a good solution. I did find a simpler solution but it only works with IOS 5.+.
Surround your iframe element with a DIV (lets call it scroller), set the height of the DIV and make sure that the new DIV has the following styling:
$('#scroller').css({'overflow' : 'auto', '-webkit-overflow-scrolling' : 'touch'});
This alone will work but you will notice that in most implementations the content in the iframe goes blank when scrolling and is basically rendered useless. My understanding is that this behavior has been reported as a bug to Apple as early as iOS 5.0. To get around that problem, find the body element in the iframe and add -webkit-transform', 'translate3d(0, 0, 0) like so:
$('#contentIframe').contents().find('body').css('-webkit-transform', 'translate3d(0, 0, 0)');
If your app or iframe is heavy on memory usage you might get a hitchy scroll for which you might need to use Sharon's solution.
This only works if you control both the outside page and the iframe page.
On the outside page, make the iframe unscrollable.
<iframe src="" height=200 scrolling=no></iframe>
On the iframe page, add this.
<!doctype html>
...
<style>
html, body {height:100%; overflow:hidden}
body {overflow:auto; -webkit-overflow-scrolling:touch}
</style>
This works because modern browsers uses html to determine the height, so we just give that a fixed height and turn the body into a scrollable node.
I have put #Sharon's code together into the following, which works for me on the iPad with two-finger scrolling. The only thing you should have to change to get it working is the src attribute on the iframe (I used a PDF document).
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Pdf Scrolling in mobile Safari</title>
</head>
<body>
<div id="scroller" style="height: 400px; width: 100%; overflow: auto;">
<iframe height="100%" id="iframe" scrolling="no" width="100%" id="iframe" src="data/testdocument.pdf" />
</div>
<script type="text/javascript">
setTimeout(function () {
var startY = 0;
var startX = 0;
var b = document.body;
b.addEventListener('touchstart', function (event) {
parent.window.scrollTo(0, 1);
startY = event.targetTouches[0].pageY;
startX = event.targetTouches[0].pageX;
});
b.addEventListener('touchmove', function (event) {
event.preventDefault();
var posy = event.targetTouches[0].pageY;
var h = parent.document.getElementById("scroller");
var sty = h.scrollTop;
var posx = event.targetTouches[0].pageX;
var stx = h.scrollLeft;
h.scrollTop = sty - (posy - startY);
h.scrollLeft = stx - (posx - startX);
startY = posy;
startX = posx;
});
}, 1000);
</script>
</body>
</html>
<div id="scroller" style="height: 400px; width: 100%; overflow: auto;">
<iframe height="100%" id="iframe" scrolling="no" width="100%" src="url" />
</div>
I'm building my first site and this helped me get this working for all sites that I use iframe embededding for.
Thanks!
Sharon's method worked for me, however when a link in the iframe is followed and then the browser back button is pressed, the cached version of the page is loaded and the iframe is no longer scrollable. To overcome this I used some code to refresh the page as follows:
if ('ontouchstart' in document.documentElement)
{
document.getElementById('Scrolling').src = document.getElementById('SCrolling').src;
}
I implemented the following and it works well. Basically, I set the body dimensions according to the size of the iFrame content. It does mean that our non-iFrame menu can be scrolled off the screen, but otherwise, this makes our sites functional with iPad and iPhone. "workbox" is the ID of our iFrame.
// Configure for scrolling peculiarities of iPad and iPhone
if (navigator.userAgent.indexOf('iPhone') != -1 || navigator.userAgent.indexOf('iPad') != -1)
{
document.body.style.width = "100%";
document.body.style.height = "100%";
$("#workbox").load(function (){ // Wait until iFrame content is loaded before checking dimensions of the content
iframeWidth = $("#workbox").contents().width();
if (iframeWidth > 400)
document.body.style.width = (iframeWidth + 182) + 'px';
iframeHeight = $("#workbox").contents().height();
if (iframeHeight>200)
document.body.style.height = iframeHeight + 'px';
});
}
Purely using MSchimpf and Ahmad's code, I made adjustments so I could have the iframe within a div, therefore keeping a header and footer for back button and branding on my page. Updated code:
<script type="text/javascript">
$("#webview").bind('pagebeforeshow', function(event){
$("#iframe").attr('src',cwebview);
});
if (navigator.userAgent.indexOf('iPhone') != -1 || navigator.userAgent.indexOf('iPad') != -1)
{
$("#webview-content").css("width","100%");
$("#webview-content").css("height","100%");
$("#iframe").load(function (){ // Wait until iFrame content is loaded before checking dimensions of the content
iframeWidth = $("#iframe").contents().width();
if (iframeWidth > 400)
$("#webview-content").css("width",(iframeWidth + 182) + 'px');
iframeHeight = $("#iframe").contents().height();
if (iframeHeight>200)
$("#webview-content").css("height",iframeHeight + 'px');
});
}
</script>
and the html
<div class="header" data-role="header" data-position="fixed">
</div>
<div id="webview-content" data-role="content" style="height:380px;">
<iframe id="iframe"></iframe>
</div><!-- /content -->
<div class="footer" data-role="footer" data-position="fixed">
</div><!-- /footer -->
Don't scroll the IFrame page or its content, scroll the parent page. If you control the IFrame content, you can use the iframe-resizer library to turn the iframe element itself into a proper block level element, with a natural/correct/native height. Also, don't attempt to position (fixed, absolute) your iframe in the parent page, or present an iframe in a modal window, especially if it has form elements.
I also suspect that iOS Safari has a non-standards behavior that expands your iframe's height to its natural height, much like the iframe-resizer library will do for desktop browsers, which seem to render responsive iframe content at height 0px or 150px or some other not useful default. If you need to contrain width, try a max-width style inside the iframe.
The solution is to use Scrolling="no" on the iframe.
That's it.
Related
Is it possible to continue scrolling through a webpage even if you are touching inside an iframe? This problem only happens with iOS devices and I couldn't find any solutions for this!
My current page contains an iframe in the middle with width:95% and about 500px height, so when I reach the iframe I can't scroll any more (unless I touch very close to the sides).
Thanks
In my case, I had full access to the iframe and was dynamically inserting its content. Still, none of the solutions suggested by Brandon S worked. My solution:
Create a transparent div overlaying the iframe.
Capture any click events on the overlay and replicate them within the iframe (to allow the user to click on links/buttons)
This works because the overlaying div is part of the outer document, making it respond to touch/click events normally, and prevents the user from directly interacting with the iframe content.
Html Template:
<div style="position: relative;">
<div
style="position: absolute; top: 0; right: 0; bottom: 0; left: 0; opacity: 0;"
ng-click="$ctrl.handleOverlayClick($event)"
></div>
</div>
Controller (AngularJS component)
...
constructor ($document, $element) {
this.iframe = $document[0].createElement('iframe');
this.iframe.width = '100%';
this.iframe.height = '100';
this.iframe.sandbox = 'allow-same-origin allow-scripts allow-popups allow-forms allow-top-navigation';
const element = $element[0].children.item(0);
element.appendChild(this.iframe);
this.contentDocument = this.iframe.contentDocument;
}
handleOverlayClick ($event) {
// Overlay element is an invisible layer on top of the iframe. We use this to
// capture scroll events which would be in the iframe (which don't work properly on iPad Safari)
// When a click is detected, we propigate that through to the iframe so the user can click on links
const rect = $event.target.getBoundingClientRect();
const x = $event.clientX - rect.left; // x position within the iframe
const y = $event.clientY - rect.top; // y position within the iframe
// triggering click on underlaying element
const clickedElement = this.contentDocument.elementFromPoint(x, y);
clickedElement && clickedElement.click();
}
It sounds like the iframe is receiving the user's scroll event, instead of the page. This can happen when part of the iframe's content doesn't fit within the size of the iframe element.
A solution to this problem is to stop the iframe from ever trying to scroll. There are few ways to accomplish this:
In iframe's HTML, add this CSS:
html, body {
overflow: hidden
}
If you don't have access to the iframe's HTML (because maybe the iframe is loading a 3rd party's content), you can put a wrapper div around the iframe and disable scrolling that way. Add this to the parent page HTML:
<div style="overflow: hidden"><iframe src="example.com"></iframe></div>
You can add this to the parent page HTML CSS to make browser use momentum so that ends up scrolling past the bottom of the iframe and then scrolls the page:
*{
-webkit-overflow-scrolling: touch
}
Add the legacy "scrolling" attribute to the iframe to stop the iframe from trying to scroll:
<iframe src="example.com" scrolling="no"></iframe>
When embedding a Bootstrap app in an iframe, modal dialogs always open at the top of the iframe, not the top of the screen. As an example, go to http://getbootstrap.com/javascript/ and open an example modal on the page. Then using the sample code below which places the same bootstrap page in an iframe, find a modal and open it:
<html>
<head>
</head>
<body>
<table width="100%">
<tr><td colspan="2" style="height:80px;background-color:red;vertical-align:top">Here's some header content I don't control</td></tr>
<tr><td style="width:230px;height:10080px;background-color:red;vertical-align:top">Here's some sidebar content I don't control either</td>
<td valign="top">
<iframe width="100%" height="10000px"
scrolling="no" src="http://getbootstrap.com/javascript/">
</iframe>
</td>
</tr>
</table>
</body>
</html>
Demo in fiddle
How do I go about positioning the modal on the screen in this scenario?
UPDATE: Unfortunately, my iFrame cannot fill the screen, nor can I make it fixed since it needs to blend into the rest of the page and the page itself has enough content to scroll. This is not my design and I ultimately intend to rework the whole thing, but this is what I have to work around for now. As a temporary option, I'm using javascript to tell the iframe parent to scroll to the top where the modal dialog pops up. While this is acceptable, this isn't the desired behavior.
I'm using angularjs and the ui-bootstrap library in my code but as you can see above, it's a bootstrap issue.
If your iframe has the same document.domain as the parent window or it is a sub domain, you can use the code below inside the iframe:
$('#myModal').on('show.bs.modal', function (e) {
if (window.top.document.querySelector('iframe')) {
$('#myModal').css('top', window.top.scrollY); //set modal position
}
});
show.bs.modal will fire after you call $('#myModal').show()
window.top.scrollY will get the scrollY position from the parent window
In case your document.domain differs from the parent, you can hack it getting the onmousedown position inside the iframe. For example:
$('#htmlElement').on('mousedown', function (event) {
event.preventDefault();
$('#myModal').data('y', event.pageY); // store the mouseY position
$('#myModal').modal('show');
});
$('#myModal').on('show.bs.modal', function (e) {
var y = $('#myModal').data('y'); // gets the mouseY position
$('#myModal').css('top', y);
});
Quite old question but I don't see the solution/workaround I've found. It might be helpful for someone in the future.
I had the same issue - my iFrame doesn't fill the entire screen, it displays bootstrap's modal and it is loading content from different domain than the parent page.
TL;DR
Use window.postMessage() API - Documentation here. for communication between parent and iframe (cross-domain)
pass message with currentScrollPosition and Y position of your iframe
Reveive message and update modal's padding from the top
In my case the workaround was to use window.postMessage() API - Documentation here.
It requires to add some extra code to the parent and handle message in an iFrame.
You can add EventListener and listen to 'scroll' event. Each time the event handling function is invoked you can get currentScrollPosition like document.scrollingElement.scrollTop.
Keep in mind that your iframe can have some margin from the top in the parent page so you should also get its 'offset'.
After that you can post these two values to your iframe e.g. ncp_iframe.contentWindow.postMessage(message, '*');
Note that the message has to be a String value
After that in your iFrame you need to add EventListener and listen to 'message' event.
The event handling function will pass your 'message' in event.data property. Having that you can update modal padding. (Looks much better if you don't use animations e.g. fade, in classes);
Quick Example:
Parent:
window.addEventListener('scroll', function(event){
var myIframe = document.querySelector('#myIframe');
var topOffset = myIframe.getBoundingClientRect().top + window.scrollY;
var currentScroll = document.scrollingElement.scrollTop;
myIframe.contentWindow.postMessage(topOffset + ':' + currentScroll, '*');
});
iFrame:
window.addEventListener('message', function(event) {
var messageContent = event.data.split(':');
var topOffset = messageContent[0];
var currentScroll = messageContent[1];
//calculate padding value and update the modal top-padding
}, false);
This is a bug in most browsers (IE appears fine) where the elements are fixed to the iframe, not the window. Typically, if you need something to be relative to the main document, it has to be in the main document.
A workaround is to wrap your iframe in a fixed position div that takes up the whole width of the screen and then maximize the iframe within that. This appears to resolve the issue
HTML:
<div class="fixframe">
<iframe src="http://getbootstrap.com/javascript/"></iframe>
</div>
CSS:
.fixframe {
position: fixed;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
}
.fixframe iframe {
height: 100%;
width: 100%;
}
Working Demo in fiddle
See Also:
position:fixed inside of an iframe
iframe with a css fixed position : possible?
position fixed div in iframe not working
It is because the class .modal has position: fixed attribute. Try position: relative instead.
Working on a website and having an issue with the Video output.
// The site is : http://tastethemovement.org
In the post, I embedded a Youtube Video with the width of 560px. It looks great in the post. But when that image is pulled to show on the homepage, It exceeds the dimensions allowed. I only want it to be a max of 316 pixels.
I've tried adding a width property in my css, a class to my iframe, but cannot get it to work. If I set an iframe class and only allow a width of 316px, then the video in the post also decreases.
Any help would be great!
I had this jQuery code in jsFiddle that expands iframe to the maximum size of the content.
In the post you add this HTML code:
<article>
<p><iframe width="400" height="400" src="http://www.youtube.com/...."></iframe></p>
</article>
In the template add the following jQuery code.
<script type='text/javascript'>
jQuery(document).ready(function($) {
$(function() {
var $allVideos = $("iframe[src^='http://player.vimeo.com'], iframe[src^='http://www.youtube.com'], object, embed"),
$fluidEl = $("p");
$allVideos.each(function() {
$(this)
// jQuery .data does not work on object/embed elements
.attr('data-aspectRatio', this.height / this.width)
.removeAttr('height')
.removeAttr('width');
});
$(window).resize(function() {
var newWidth = $fluidEl.width();
$allVideos.each(function() {
var $el = $(this);
$el
.width(newWidth)
.height(newWidth * $el.attr('data-aspectRatio'));
});
}).resize();
});
});
</script>
I tried the code on my Wordpress site and it worked.
If those images on the homepage are coming from the "set featured image" method you could do a screen grab of the video, resize that and use it as the "featured image".
Here is very tricky situation i have tried many things but cant figure it out. I have following iframe:
<div id="content"> <iframe id="iF" name="if" marginwidth="0" marginheight="0" frameborder="0" src=""></iframe>
</div>
Source is entered through jquery to this. Problem is when source is entered it is two big in height and width. So i see two scroll bars. Is there anyway that iframe data will move with main page scrollbar. Rather than adding two different scrollbars.
Here is an image of what i am seeing now:
You need to resize it after the content have been filled, and this can done by using Javascript.
<script type="text/javascript">
function iframeLoaded()
{
var iFrameID = document.getElementById('idIframe');
if(iFrameID)
{
// here you can meke the height, I delete it first, then I make it again
iFrameID.height = "";
iFrameID.height = iFrameID.contentWindow.document.body.scrollHeight + "px";
}
}
</script>
<iframe id="idIframe" onload="iframeLoaded()" ...
Other solution is to add height and width to a persent value, like 100% to get all the width/height of your window, and hide the scroll bars of iframe.
I want to display my page inside another page via Iframe.
The problem is that the iframe doesn't resize automatically (height).
How can I resize it automatically? Or maybe there is better way to display one page inside another?
Here's one way: http://www.mattcutts.com/blog/iframe-height-scrollbar-example/
If the height of the frame may change after it's loded (e.g. expanding/collapsible regions) then you can set up a polling mechanism to periodically resize the frame in case the size has changed. Like this:
<html>
<head> <title>Parent frame</title> </head>
<body onload="window.setTimeout(resizeFrame, 250)" bgcolor="#cccccc">
<script type="text/javascript">
// Firefox worked fine. Internet Explorer shows scrollbar because of frameborder
function resizeFrame() {
var f = document.getElementById('childframe');
if (f.style.height != f.contentWindow.document.body.scrollHeight + "px")
f.style.height = f.contentWindow.document.body.scrollHeight;
window.setTimeout(resizeFrame, 250)
}
</script>
<p>Parent frame.</p>
<p>Parent frame.</p>
<p>Parent frame.</p>
<p>Parent frame.</p>
<p>
<iframe frameborder=0 src="./innerframe.htm" name="childframe" id="childframe">
</iframe>
</p>
</body>
</html>
Note: I'm assuming that you're using frames because you're pulling content from another domain. If you're pulling content from the same domain, you might be able to simply use script to fetch the content using XmlHttpRequest, and then inject the HTML into a DIV on the parent page. You can't do this if the content lives on a different domain, due to browsers' cross-site scripting limitations.
setInterval(function() {
var ifm = document.getElementById("ifrmeID");
var h = ifm.contentWindow.document.body.scrollHeight;
ifm.height = h < 400 ? 400 : h;
}, 800);
400 is the default height if you didnt want iframe too short,800(ms) is frequency,you can adjust these two values. put the js in the end of your page which contained iframe .then it will be ok.