How do I lock the orientation to portrait mode in a iPhone Web Application?

by

This is a pretty hacky solution, but it’s at least something(?). The idea is to use a CSS transform to rotate the contents of your page to quasi-portrait mode. Here’s JavaScript (expressed in jQuery) code to get you started: 

$(document).ready(function () {
  function reorient(e) {
    var portrait = (window.orientation % 180 == 0);
    $("body > div").css("-webkit-transform", !portrait ? "rotate(-90deg)" : "");
  }
  window.onorientationchange = reorient;
  window.setTimeout(reorient, 0);
});

The code expects the entire contents of your page to live inside a div just inside the body element. It rotates that div 90 degrees in landscape mode – back to portrait.

Left as an exercise to the reader: the div rotates around its centerpoint, so its position will probably need to be adjusted unless it’s perfectly square.

Also, there’s an unappealing visual problem. When you change orientation, Safari rotates slowly, then the top-level div snaps to 90degrees different. For even more fun, add

body > div { -webkit-transition: all 1s ease-in-out; }

to your CSS. When the device rotates, then Safari does, then the content of your page does. Beguiling!

More Related Contents:

  1. How do I reset the scale/zoom of a web app on an orientation change on the iPhone?
  2. IOS 6 force device orientation to landscape
  3. Horizontal UITableView
  4. Best way to programmatically detect iPad/iPhone hardware
  5. Orientation in a UIView added to a UIWindow
  6. Crash on presenting UIImagePickerController under iOS 6.0
  7. What is the best method of re-rendering a web page on orientation change?
  8. iOS device orientation disregarding orientation lock
  9. Responsive website on iPhone – unwanted white space on rotate from landscape to portrait
  10. Disable orientation change rotation animation
  11. How to set device (UI) orientation programmatically?
  12. iPhone Landscape FAQ and Solutions
  13. MFMailComposeViewController image orientation
  14. Detecting iOS orientation change instantly
  15. Force portrait orientation while pushing from landscape View Controller
  16. Force UIImagePickerController to take photo in portrait orientation/dimensions iOS
  17. FFmpeg on iPhone – Modifying Video Orientation
  18. Best way to serialize an NSData into a hexadeximal string
  19. iOS download and save image inside app
  20. shouldAutorotateToInterfaceOrientation is not working in iOS 6
  21. Removing a view controller from UIPageViewController
  22. How to rotate an image 90 degrees on iOS?
  23. How to fix “failed codesign verification” of an iPhone project?
  24. Changing the background color of a UIAlertView?
  25. Supported Audio file formats in iPhone [closed]
  26. iOS installing apps without app store [closed]
  27. how to remove subviews from scrollview?
  28. iOS Stream Audio from one iOS Device to Another
  29. Check for Internet connection using the iOS SDK [duplicate]
  30. Command /Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1

Leave a Comment