本文是分享了javascript实现移动端上的触屏拖拽功能，具体内容如下
效果图：
代码：
<Meta charset="utf-8">
touchstart,touchmove,touchend,touchcancel
@H_404_22@
// 获取节点
var block = document.getElementById("block");
var oW,oH;
// 绑定touchstart事件
block.addEventListener("touchstart",function(e) {
console.log(e);
var touches = e.touches[0];
oW = touches.clientX - block.offsetLeft;
oH = touches.clientY - block.offsetTop;
//阻止页面的滑动默认事件
document.addEventListener("touchmove",defaultEvent,false);
},false)
block.addEventListener("touchmove",function(e) {
var touches = e.touches[0];
var oLeft = touches.clientX - oW;
var oTop = touches.clientY - oH;
if(oLeft < 0) {
oLeft = 0;
}else if(oLeft > document.documentElement.clientWidth - block.offsetWidth) {
oLeft = (document.documentElement.clientWidth - block.offsetWidth);
}
block.style.left = oLeft + "px";
block.style.top = oTop + "px";
},false);
block.addEventListener("touchend",function() {
document.removeEventListener("touchmove",false);
function defaultEvent(e) {
e.preventDefault();
}
以上就是本文的全部内容，希望对大家学习javascript程序设计有所帮助。
