ktyr report

iPhone,iPodTouch,iPadのSafariでは、javascriptでタッチしたかどうか取得することが出来ます。
ここにそのサンプルを記します。

iPhone,iPodTouch,iPadで下記アクセス。
/js/07/
 

html

<div id="field" onSelectStart="return false;" onMouseDown="return false;">
	<div id="output">touch me !</div>
	<div id="cross"></div>
</div>

CSS

body{
	padding:0;
	margin:0;
}
div#field{
	padding:0;
	margin:0;
	width:320px;
	height:416px;
	border-bottom:1px solid;
	position:absolute;
}
div#output{
	padding:0;
	padding-top:20px;
	margin:0;
	width:320px;
	font-size:12px;
	text-align:center;
	text-weight:bold;
	border:none;
	position:absolute;
	z-index:80;
}
div#cross{
	background-image:url(../image/cross.gif);
	width:21px;
	height:21px;
	position:absolute;
	z-index:30;
	display:none;
}

javascript

setInterval(oef_check, 1000/30);
var mc;
mc=document.getElementById("field");

//タッチした時
mc.addEventListener("touchstart", onTouchStart, false);
//指が動いた時
mc.addEventListener("touchmove", onTouchMove, false);
//指が離れた時
mc.addEventListener("touchend", onTouchEnd, false);
//イベントがシステムによってキャンセルされた時
mc.addEventListener("touchcancel", onTouchCancel, false);

//２本の指がタッチした時
mc.addEventListener("gesturestart", onGestureStart, false);
//２本の指が動いた時
mc.addEventListener("gesturechange", onGestureChange, false);
//指が０～１本になった時
mc.addEventListener("gestureend", onGestureEnd, false);

function onTouchStart(e){
	e.preventDefault();
	st1="onTouchStart";
	tlist=e.touches;
	set_touch_center();

}
function onTouchMove(e){
	e.preventDefault();
	st1="onTouchMove";
	tlist=e.touches;
	set_touch_center();

}
function onTouchEnd(e){
	e.preventDefault();
	st1="onTouchEnd";
	tlist=e.touches;
	set_touch_center();

}
function onTouchCancel(e){
	e.preventDefault();
	st2="onTouchCancel";
	tlist=e.touches;
	set_touch_center();
}

function onGestureStart(e){
	e.preventDefault();
	st2="onGestureStart";
	tlist=e.touches;
	set_touch_center();

}
function onGestureChange(e){
	e.preventDefault();
	st3="onGestureChange";
	tlist=e.touches;
	set_touch_center();

}
function onGestureEnd(e){
	e.preventDefault();
	st2="onGestureEnd";
	st3="";
	tlist=e.touches;
	set_touch_center();

}
function set_touch_center(){
	var a;
	var m;
	var bx=0;
	var by=0;
	for(a=0;a<tlist.length;a++){
		m=tlist[a];
		bx+=m.pageX;
		by+=m.pageY;
	}
	bx/=tlist.length;
	by/=tlist.length;
	tc.x=bx;
	tc.y=by;
}
function oef_check(){
	var s="";
	s+=st1;
	s+="<br>";
	s+=st2;
	s+="<br>";
	s+=st3;
	s+="<br>";
	if(tlist.length>0)s+="タッチの中心座標 x："+tc.x+"y："+tc.y+"";
	var mc=document.getElementById("output");
	mc.innerHTML=s;
	mc=document.getElementById("cross");
	mc.style.left=(tc.x-10)+"px";
	mc.style.top=(tc.y-10)+"px";
	mc.style.display="block";
}