jquery实现拖动效果的代码分享

时间：2022-06-25 17:19:35 编辑：袖梨来源：一聚教程网

代码如下复制代码

<html lang="en">

<head>

<meta charset="UTF-8">

<title>Documenttitle>

head>

<body>

<style type="text/css">

.page{text-align:left;}

 .dragDiv{border:1px solid #ddd; padding:10px; width:300px; margin:0 auto; border-radius:4px; box-shadow:0 1px 2px #fefefe; position: fixed;}

style>

<div class="dragDiv" id="drag">

<div class="drag-head">自己动手试试div>

<div class="drag-body">

点击鼠标拖拖看

div>

body>

<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js">script>

<script>

var _drag = {};

_drag.top = 0; //拖动过的位置距离上边

_drag.left = 0; //拖动过的位置距离左边

_drag.maxLeft; //距离左边最大的距离

_drag.maxTop; //距离上边最大的距离

_drag.dragging = false; //是否拖动标志

//拖动函数

function bindDrag(el){

 var winWidth = $(window).width(), winHeight =$(window).height(),objWidth = $(el).outerWidth(), objHeight = $(el).outerHeight();

_drag.maxLeft = winWidth - objWidth, _drag.maxTop = winHeight - objHeight;

var els = el.style,x=0,y=0;

var objTop = $(el).offset().top, objLeft = $(el).offset().left;

$(el).mousedown(function(e){

_drag.dragging = true;

_drag.isDragged = true;

x = e.clientX - el.offsetLeft;

y = e.clientY - el.offsetTop;

el.setCapture && el.setCapture();

$(document).bind('mousemove',mouseMove).bind('mouseup',mouseUp);

return false;

});

function mouseMove(e){

e = e || window.event;

if(_drag.dragging){

_drag.top = e.clientY - y;

_drag.left = e.clientX - x;

_drag.top = _drag.top > _drag.maxTop ? _drag.maxTop : _drag.top;

_drag.left = _drag.left > _drag.maxLeft ? _drag.maxLeft : _drag.left;

_drag.top = _drag.top < 0 ? 0 : _drag.top;

_drag.left = _drag.left <0 ? 0 : _drag.left;

els.top = _drag.top + 'px';

els.left = _drag.left+ 'px';

return false;

}

function mouseUp(e){

_drag.dragging = false;

el.releaseCapture && el.releaseCapture();

e.cancelBubble = true;

$(document).unbind('mousemove',mouseMove).unbind('mouseup',mouseUp);

}

$(window).resize(function(){

var winWidth = $(window).width(),

winHeight = $(window).height(),

el = $(el),

elWidth = el.outerWidth(),

elHeight = el.outerHeight(),

elLeft = parseFloat(el.css('left')),

elTop = parseFloat(el.css('top'));

_drag.maxLeft = winWidth - elWidth;

_drag.maxTop = winHeight - elHeight;

_drag.top = _drag.maxTop < elTop ? _drag.maxTop : elTop;

_drag.left = _drag.maxLeft < elLeft ? _drag.maxLeft : elLeft;

el.css({

top:_drag.top,

left:_drag.left

})

}

bindDrag(document.getElementById('drag'));

html>

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