2.js
var flag = false;
var cur = {
x: 0,
y: 0
}
var nx, ny, dx, dy, x, y;
function down() {
flag = true;
var touch;
if(event.touches) {
touch = event.touches[0];
} else {
touch = event;
}
cur.x = touch.clientX;
cur.y = touch.clientY;
dx = div2.offsetLeft;
dy = div2.offsetTop;
}
function move() {
if(flag) {
var touch;
if(event.touches) {
touch = event.touches[0];
} else {
touch = event;
}
nx = touch.clientX - cur.x;
ny = touch.clientY - cur.y;
x = dx + nx;
y = dy + ny;
div2.style.left = x + "px";
div2.style.top = y + "px";
//阻止页面的滑动默认事件
document.addEventListener("touchmove", function() {
event.preventDefault();
}, false);
}
}
//鼠标释放时候的函数
function end() {
flag = false;
}
var div2 = document.getElementById("div2");
div2.addEventListener("mousedown", function() {
down();
}, false);
div2.addEventListener("touchstart", function() {
down();
}, false)
div2.addEventListener("mousemove", function() {
move();
}, false);
div2.addEventListener("touchmove", function() {
move();
}, false)
document.body.addEventListener("mouseup", function() {
end();
}, false);
div2.addEventListener("touchend", function() {
end();
}, false);效果：
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