IFRAMEs and the Safari on the iPad how can the user scroll the content

Question

According to the Apple iOS mantra it should be possible to scroll the contents of an IFRAME by dragging it with two fingers   Unfortunately running the latest version of iOS on the iPad I have yet to find a single website with an IFRAME that scrolls using this method - no scrollbars appear either   Does anyone know how a user is supposed to scroll the contents of an IFRAME with the mobile Safari

User · Answer

As mentioned in other posts  the combination of css values of overflow  auto   amp   -webkit-overflow-scrolling  touch   works when applied to BOTH the iframe in question AND its parent div  With the unfortunate side-effect of double scrollbars on non-touch browsers   The solution I used was to add these css values via javascript jquery  Which allowed me to use a base css for all browsers  if  isSafariBrowser             parentDivID   css  overflow    auto            parentDivID   css  -webkit-overflow-scrolling    touch            iframeID   css  overflow    auto            iframeID   css  -webkit-overflow-scrolling    touch        where isSafariBrowser   is defined as foll     var is chrome   navigator userAgent indexOf  Chrome    gt  -1  var is safari   navigator userAgent indexOf  Safari    gt  -1   function isSafariBrowser        if  is safari           if  is chrome      Chrome seems to have both Chrome and Safari userAgents             return false          else             return true            return false      This allowed my application to work on an iPad  Note 1  Not tested on other ios systems 2  Not tested this on Android browsers on tablets  may need additional changes   so this solution may not be complete

User · Answer

None of the solutions so far completely worked for me when I tried  sometimes  only buggy on secondary loads   but as a workaround  using an object element as described here  then wrapping in a scrollable div  then setting the object to a very high height  5000px  did the job for me  It s a big workaround and doesn t work incredibly well  for starters  pages over 5000px would cause issues -- 10000px completely broke it for me though  but it seems to get the job done in some of my test cases   var style    left     px  top     px               width     px  height     px  border         if  isIOs        style       overflow  scroll  important  -webkit-overflow-scrolling  touch  important        html     lt div style      style      gt                  lt object type  text html  data  http   example com                  style  width  100   height  5000px   gt  lt  object gt                  lt  div gt      else       style       overflow  auto        html     lt iframe src  http   example com                  style      style      gt  lt  iframe gt        Here s hoping Apple will fix the Safari iFrame issues

User · Answer

Add overflow  auto  to the style and the two finger scroll should work

User · Answer

This is not my answer  but I just copied it from https   gist github com anonymous 2388015 just because the answer is awesome and fixes the problem completely  Credit completely goes to the anonymous author    lt script type  text javascript  src  http   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  gt  lt  script gt   lt script type  text javascript  gt        function            if   iPhone iPod iPad  test navigator userAgent                  iframe   wrap function                    var  this     this                   return     lt div   gt    css                       width   this attr  width                        height   this attr  height                        overflow   auto                        -webkit-overflow-scrolling    touch                                              lt  script gt

User · Answer

This is what I did to get iframe scrolling to work on iPad  Note that this solution only works if you control the html that is displayed inside the iframe    It actually turns off the default iframe scrolling  and instead causes the body tag inside the iframe to scroll   main html    lt  DOCTYPE html gt   lt html gt   lt head gt   lt style type  text css  gt   container       position  absolute      top  50px      left  50px      width  400px      height  300px      overflow  hidden     iframe       width  400px      height  300px     lt  style gt   lt  head gt   lt body gt        lt div id  container  gt           lt iframe src  test html  id  iframe  scrolling  no  gt  lt  iframe gt       lt  div gt    lt  body gt   lt  html gt    test html    lt  DOCTYPE html gt   lt html gt   lt head gt   lt style type  text css  gt  html        overflow  auto       -webkit-overflow-scrolling  touch     body       height  100       overflow  auto       -webkit-overflow-scrolling  touch      margin  0      padding  8px     lt  style gt   lt  head gt   lt body gt       lt  body gt   lt  html gt    The same could probably be accomplished using jQuery if you prefer       iframe   contents   find  body   css        height    100         overflow    auto         -webkit-overflow-scrolling    touch        I used this solution to get TinyMCE  wordpress editor  to scroll properly on the iPad

User · Answer

The Problem  I help maintain a big  complicated  messy old site in which everything  literally  is nested in multiple levels of iframes-- many of which are dynamically created and or have a dynamic src  That creates the following challenges    Any changes to the HTML structure risk breaking scripts and stylesheets that haven t been touched in years  Finding and fixing all of the iframes and src documents manually would take way too much time and effort    Of the solutions posted so far  this is the only one I ve seen that overcomes challenge 1  Unfortunately  it doesn t seem to work on some iframes  and when it does  the scrolling is very glitchy  which seems to cause other bugs on the page  such as unresponsive links and form controls    The Solution  If the above sounds anything like your situation  you may want to give the following script a try  It forgoes native scrolling and instead makes all iframes draggable within the bounds of their viewport  You only need to add it to the document that contains the top level iframes  it will apply the fix as needed to them and their descendants   Here s a working fiddle   and here s the code    function       var mouse   false   Set mouse true to enable mouse support       iOS    iPad iPhone iPod  test navigator platform     if mouse    iOS         function           var currentFrame           startEvent  moveEvent  endEvent           screenY  translateY  minY  maxY           matrixPrefix  matrixSuffix           matrixRegex            d-       5 13       d-                   min   Math min  max   Math max           topWin   window        if  iOS            startEvent    mousedown           moveEvent    mousemove           endEvent    mouseup                 else           startEvent    touchstart           moveEvent    touchmove           endEvent    touchend                 setInterval scrollFix  500         function scrollFix    fixSubframes topWin frames          function fixSubframes wins   for var i   wins length  i  addListeners wins --i            function addListeners win            try             var doc   win document            if  doc draggableframe                win addEventListener  unload   resetFrame               doc draggableframe   true              doc addEventListener startEvent  touchStart               doc addEventListener moveEvent  touchMove               doc addEventListener endEvent  touchEnd                         fixSubframes win frames                     catch e                   function resetFrame e            var doc   e target             win   doc defaultView             iframe   win frameElement             style   getComputedStyle iframe  transform          if iframe   currentFrame  currentFrame   null          win removeEventListener  unload   resetFrame           doc removeEventListener startEvent  touchStart           doc removeEventListener moveEvent  touchMove           doc removeEventListener endEvent  touchEnd           if style      none               style   style replace matrixRegex    1  3  4   split                 iframe style transform   style 0    0   style 2                     else iframe style transform   null          iframe style WebkitClipPath   null          iframe style clipPath   null          delete doc draggableiframe                function touchStart e            var iframe  style  offset  coords             touch   e touches   e touches 0    e             elem   touch target             tag   elem tagName          currentFrame   null          if tag    TEXTAREA     tag    SELECT     tag    HTML   return          for  elem parentElement  elem   elem parentElement              if elem scrollHeight  gt  elem clientHeight                style   getComputedStyle elem  overflowY              if style    auto     style    scroll   return                                elem   elem ownerDocument body          iframe   elem ownerDocument defaultView frameElement          coords   getComputedViewportY elem clientHeight  lt  iframe clientHeight   elem   iframe           if coords elemTop  gt   coords top  amp  amp  coords elemBottom  lt   coords bottom  return          style   getComputedStyle iframe  transform          if style      none               style   style replace matrixRegex    1  3  4   split                 matrixPrefix   style 0             matrixSuffix   style 2             offset   parseFloat style 1                      else             matrixPrefix    matrix 1  0  0  1  0               matrixSuffix                  offset   0                    translateY   offset          minY   min 0  offset -  coords elemBottom - coords bottom            maxY   max 0  offset    coords top - coords elemTop            screenY   touch screenY          currentFrame   iframe                function touchMove e            var touch  style          if currentFrame              touch   e touches   e touches 0    e            style   min maxY  max minY  translateY    touch screenY - screenY               if style   translateY  return            e preventDefault              currentFrame contentWindow getSelection   removeAllRanges              translateY   style            currentFrame style transform   matrixPrefix   style   matrixSuffix            style    inset      -style     px 0px     style    px 0px              currentFrame style WebkitClipPath   style            currentFrame style clipPath   style            screenY   touch screenY                          function touchEnd    currentFrame   null         function getComputedViewportY elem            var style  offset             doc   elem ownerDocument             bod   doc body             elemTop   elem getBoundingClientRect   top   elem clientTop             elemBottom   elem clientHeight             viewportTop   elemTop             viewportBottom   elemBottom   elemTop             position   getComputedStyle elem  position          try             while true                if elem     bod    position      fixed                   if doc defaultView frameElement                    elem   doc defaultView frameElement                  position   getComputedStyle elem  position                  offset   elem getBoundingClientRect   top   elem clientTop                  viewportTop    offset                  viewportBottom   min viewportBottom   offset  elem clientHeight   offset                   elemTop    offset                  doc   elem ownerDocument                  bod   doc body                  continue                                else break                            else                 if position      absolute                     elem   elem offsetParent                  style   getComputedStyle elem                   position   style position                  if position      static   continue                                else                   elem   elem parentElement                  style   getComputedStyle elem                   position   style position                                if style overflowY      visible                     offset   elem getBoundingClientRect   top   elem clientTop                  viewportTop   max viewportTop  offset                   viewportBottom   min viewportBottom  elem clientHeight   offset                                                               catch e             return             top  max viewportTop  0             bottom  min viewportBottom  doc defaultView innerHeight             elemTop  elemTop            elemBottom  elemBottom   elemTop                                            The jsfiddle has mouse support enabled for testing purposes  On a production site  you d want to set mouse false

User · Answer

Based on this article  I have put together the following snippet that provides some very basic functionality    lt div id    container  gt  lt  div gt   lt script gt  function setPDFHeight                 pdfObject   0  height       pdfObject   0  offsetHeight              container   append   lt div align  center  style  width  100   height 100   overflow  auto  important  -webkit-overflow-scrolling  touch  important   gt          lt object id  pdfObject  width  100   height  1000000000000  align  center  data  content lessons 12 t pdf  type  application pdf  onload  setPDFHeight    gt You have no plugin installed lt  object gt  lt  div gt        lt  script gt    Obviously it is far from perfect  given that it practically expands your page height to infinity   but it s the only viable workaround I ve found so far

User · Answer

It doesn t appear that iframes display and scroll properly  You can use an object tag to replace an iframe and the contents will be scrollable with 2 fingers  Here s a simple example    lt html gt       lt head gt           lt meta name  viewport  content  minimum-scale 1 0  maximum-scale 1 0  user-scalable false  initial-scale 1 0    gt       lt  head gt       lt body gt           lt div gt HEADER - use 2 fingers to scroll contents  lt  div gt           lt div id  scrollee  style  height 75     gt               lt object id  object  height  90   width  100   type  text html  data  http   en wikipedia org   gt  lt  object gt           lt  div gt           lt div gt FOOTER lt  div gt       lt  body gt   lt  html gt

User · Answer

-webkit-overflow-scrolling touch as mentioned in the answer is infact the possible solution     lt div style  overflow scroll  important  -webkit-overflow-scrolling touch  important   gt        lt iframe src  YOUR PAGE URL  width  600  height  400  gt  lt  iframe gt   lt  div gt    But if you are unable to scroll up and down inside the iframe as shown in image below    you could try scrolling with 2 fingers diagonally like this     This actually worked in my case  so just sharing it if you haven t still found a solution for this

User · Answer

After much aggravation  I discovered how to scroll in iframes on my ipad   The secret was to do a vertical finger swipe  single finger was fine  on the LEFT side of the iframe area  and maybe slightly outside of the border    On a laptop or PC  the scroll bar is on the right  so naturally  I spent of lot of time on my ipad experimenting with finger motions on the right side  Only when I tried the left side would the iframe scroll

User · Answer

The code below works for me  thanks to Christopher Zimmermann for his blog post http   dev magnolia-cms com blog 2012 05 strategies-for-the-iframe-on-the-ipad-problem    The problems are    There are no scroll bars to let the user know that they can scroll Users have to use two-finger scrolling The PDF files are not centered  still working on it    lt  DOCTYPE HTML gt   lt html gt   lt head gt     lt title gt Testing iFrames on iPad lt  title gt     lt style gt    div       border  solid 1px green      height 100px        scroller      border solid 1px  66AA66      height  400px      width  400px      overflow  auto      text-align center      lt  style gt         lt table gt     lt tr gt       lt td gt  lt div class  scroller  gt       lt iframe width  400  height  400  src  http   www supremecourt gov opinions 11pdf 11-393c3a2 pdf   gt  lt  iframe gt   lt  div gt       lt  td gt       lt td gt  lt div class  scroller  gt       lt iframe width  400  height  400  src  http   www supremecourt gov opinions 11pdf 11-393c3a2 pdf   gt  lt  iframe gt   lt  div gt       lt  td gt     lt  tr gt     lt tr gt     lt td gt  lt div class  scroller  gt       lt iframe width  400  height  400  src  http   www supremecourt gov opinions 11pdf 11-393c3a2 pdf   gt  lt  iframe gt   lt  div gt       lt  td gt       lt td gt  lt div class  scroller  gt       lt iframe width  400  height  400  src  http   www supremecourt gov opinions 11pdf 11-393c3a2 pdf   gt  lt  iframe gt   lt  div gt       lt  td gt     lt  tr gt   lt  table gt   lt div gt  Here are some additional contents  lt  div gt

User · Answer

iOS 5 added the following style that can be added to the parent div so that scrolling works     -webkit-overflow-scrolling touch

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