Can I trigger a CSS event in mobile safari upon iphone orientation change?
I'm trying to figure out 开发者_如何学Chow to change an embedded web page when the user rotates their phone from portrait to landscape mode - basically to load a view that is better suited to the wider screen format. Is this possible to do without calling a new page from the server, i.e. to drive it from within CSS/Javascript itself?
Thanks!
You can use the window.orientation property. Its value is the degree that the current mode of view is used. Here is a brief example:
function updateOrientation()
{
var orientation=window.orientation;
switch(orientation)
{
case 0:
break;
case 90:
break;
case -90:
break;
}
}
You can use this function on this event:
window.onorientationchange=updateOrientation;
Hope that helps!
Best not to set the onorientationchange property directly. Instead use the following:
window.addEventListener('orientationchange', function (evt) {
switch(window.orientation) {
case 0: // portrait
case 180: // portrait
case 90: // landscape
case -90: // landscape
}
}, false);
I can't believe no one talked about the css ruling:
@media screen and (max-width: 320px) // Portait Mode
{
/* CSS RULINGS */
p{}
body{}
}
@media screen and (min-width: 321px) // Landscape Mode
{
/* CSS RULINGS */
p{}
body{}
}
The Safari mobile browser has support for the orientationchange event as well as the orientation property on the window, so you can do something like:
window.onorientationchange = function() {
switch(window.orientation) {
case 0: // Portrait
case 180: // Upside-down Portrait
// Javascript to setup Portrait view
break;
case -90: // Landscape: turned 90 degrees counter-clockwise
case 90: // Landscape: turned 90 degrees clockwise
// Javascript to steup Landscape view
break;
}
}
I would add the upside-down because the iPad human interface guidelines say you should support all orientations, so I would expect Safari on the iPad (and possibly future iPhone versions) to support it.
Safari Mobile supports orientation events.
<body onorientationchange="updateOrientation();">
From: Safari Web Content Guide
加载中,请稍侯......
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