HOWto pinching to zoom on a UIWebView [JS-callback] iPhone, iPod Touch, iPad
in a Web view I use this code for Zoom :
<body id='body'>
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<script type="text/javascript" charset="utf-8">
body = document.getElementById('body');
// (in percents)
zoom = 100;
maxZoom = 200;
minZoom = 50;
zoomIncrement = 25;
function gestureEnd(event) {
var newZoom;
if (event.scale > 1.0) {
// increase size
开发者_如何学JAVA newZoom = zoom + zoomIncrement;
} else {
// decrease size
newZoom = zoom - zoomIncrement;
}
// don't exceed zoom boundaries
if (newZoom > maxZoom || newZoom < minZoom) {
return;
}
zoom = newZoom;
body.style.webkitTextSizeAdjust = zoom+"%";
}
body.addEventListener("gestureend", gestureEnd, false);
</script>
</body>
HOW CAN I HAVE FROM webview zoom variable value every pinch-event (to change the default value in the APP) ??
A sort of 'callback' method by JS to App..
If you want to get the value of a JS variable to use in App native Obj-C, maybe you can use stringByEvaluatingJavaScriptFromString method.
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