Flexbox Orientation Change Width / Height Issues - ios

Question

I am attempting to use flexbox to achieve a series of sections that fill 100% width and height of the viewport. This works perfectly on desktop without any issues when resizing the browser window. On mobile however, whenever I change the orientation, the section sizing does not adjust correctly.
I have made a pen of my issue:
http://codepen.io/beefchimi/full/LlInw/
The flexbox css is:
main {
display: flex;
flex-flow: row wrap;
}
section {
display: flex;
flex: 1 0 100%;
height: 100vh;
}
article {
margin: auto;
}
I believe my implementation is correct... but I'm very surprised to see iOS not behaving as expected. Any suggestions on solving this problem?
Thanks!

Answer 1

Turns out this is an iOS 6 - 7 bug. More information can be found here:
https://github.com/scottjehl/Device-Bugs/issues/36
The github issue thread suggests a js plugin:
https://github.com/rodneyrehm/viewport-units-buggyfill
For my particular case, I simply implemented my own bit of jQuery that will measure the window height on window load, apply that value to all sections, then track the window height during window resize and reapply. An unfortunate work around :(
var $window = $(window),
$sections = $('section'),
windowHeight;
function adjustHeight() {
// get height of browser window on page load and resize events
windowHeight = $window.height();
// apply windowHeight to each <section>
$sections.height(windowHeight);
}
$window.resize(function() {
adjustHeight();
});
$window.load(function() {
adjustHeight();
});