How to set viewport meta for iPhone that handles rotation properly

Question

So I ve been using    lt meta name  viewport  content  width device-width  initial-scale 1 0  maximum-scale 1 0    gt    to get my HTML content to display nicely on the iPhone   It works great until the user rotates the device into landscape mode  where the display remains constrained to 320px   Is there a simple way to specify a viewport that changes in response to the user changing the device orientation   Or must I resort to Javascript to handle that

User · Answer

I have come up with a slighly different approach that should work on cross platforms

http://www.jqui.net/tips-tricks/fixing-the-auto-scale-on-mobile-devices/

So far I have tested in on

Samsun galaxy 2

Samsung galaxy s
Samsung galaxy s2
Samsung galaxy Note (but had to change the css to 800px [see below]*)
Motorola
iPhone 4
- @media screen and (max-width:800px) {

This is a massive lip forward with mobile development ...

User · Answer

lt meta name  viewport  content  width device-width  minimum-scale 1  maximum-scale 1  gt    suport all iphones  all ipads  all androids

User · Answer

You don t want to lose the user scaling option if you can help it  I like this JS solution from here    lt script type  text javascript  gt   function doc         var addEvent    addEventListener           type    gesturestart           qsa    querySelectorAll           scales    1  1           meta   qsa in doc   doc qsa   meta name viewport               function fix             meta content    width device-width minimum-scale     scales 0      maximum-scale     scales 1           doc removeEventListener type  fix  true              if   meta   meta meta length - 1    amp  amp  addEvent in doc            fix            scales     25  1 6           doc addEvent  type  fix  true            document     lt  script gt

User · Answer

You re setting it to not be able to scale  maximum-scale   initial-scale   so it can t scale up when you rotate to landscape mode  Set maximum-scale 1 6 and it will scale properly to fit landscape mode

User · Answer

I had this issue myself  and I wanted to both be able to set the width  and have it update on rotate and allow the user to scale and zoom the page  the current answer provides the first but prevents the later as a side-effect    so I came up with a fix that keeps the view width correct for the orientation  but still allows for zooming  though it is not super straight forward   First  add the following Javascript to the webpage you are displaying     lt script type  text javascript  gt   function setViewPortWidth width      var metatags   document getElementsByTagName  meta      for cnt   0  cnt  lt  metatags length  cnt          var element   metatags cnt      if element getAttribute  name       viewport          element setAttribute  content   width     width    maximum-scale   5  user-scalable   yes        document body style  max-width     width  px                 lt  script gt    Then in your -  void didRotateFromInterfaceOrientation  UIInterfaceOrientation fromInterfaceOrientation method  add   float availableWidth    EmailVC webViewWidth   NSString  stringJS   stringJS    NSString stringWithFormat   document body offsetWidth    float documentWidth      webView stringByEvaluatingJavaScriptFromString stringJS  floatValue    if documentWidth  gt  availableWidth  return     Don t perform if the document width is larger then available  allow auto-scale      Function setViewPortWidth defined in EmailBodyProtocolHandler prepend stringJS    NSString stringWithFormat   setViewPortWidth  f    availableWidth     webView stringByEvaluatingJavaScriptFromString stringJS     Additional Tweaking can be done by modifying more of the viewportal content settings   http   www htmlgoodies com beyond webmaster toolbox article php 3889591 Detect-and-Set-the-iPhone--iPads-Viewport-Orientation-Using-JavaScript-CSS-and-Meta-Tags htm  Also  I understand you can put a JS listener for onresize or something like to trigger the rescaling  but this worked for me as I m doing it from Cocoa Touch UI frameworks   Hope this helps someone

User · Answer

For anybody still interested   http   wiki phonegap com w page 16494815 Preventing-Scrolling-on-iPhone-Phonegap-Applications  From the page    lt meta name  viewport  content  user-scalable no width device-width    gt       This instructs Safari to prevent   the user from zooming into the page   with the  pinch  gesture and fixes the   width of the view port to the width of   the screen  which ever orientation the   iPhone is in

User · Answer

Was just trying to work this out myself  and the solution I came up with was    lt meta name  viewport  content  initial-scale   1 0 maximum-scale   1 0    gt    This seems to lock the device into 1 0 scale regardless of it s orientation  As a side effect  it does however completely disable user scaling  pinch zooming  etc

User · Answer

just want to share  i ve played around with the viewport settings for my responsive design  if i set the Max scale to 0 8  the initial scale to 1 and scalable to no then i get the smallest view in portrait mode and the iPad view for landscape  D    this is properly an ugly hack but it seems to work  i don t know why so i won t be using it  but interesting results   lt meta name  viewport  content  user-scalable no  initial-scale   1 0 maximum-scale   0 8 width device-width    gt    enjoy

User · Answer

Why not just reload the page when the user rotates the screen with javascript  function doOnOrientationChange     location reload       window addEventListener  orientationchange   doOnOrientationChange

[iphone] How to set viewport meta for iPhone that handles rotation properly?

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