如何在div中制作可拖动图片？

Question

I am trying to move a image in a div like a facebook cover page, but it is not moving smoothly with image tag 我正在尝试在像Facebook封面这样的div中移动图像，但是使用图像标签时它无法平稳移动 . 。 when I put this image in a div like a background image it is working my js code is .. 当我将此图像放在像背景图像这样的div中时，它在工作，我的js代码是..

var draggable = function(element) {
    element.addEventListener('mousedown', function(e) {
        e.stopPropagation();
        if (e.target != element)
            return;
        var offsetX = e.pageX - element.offsetLeft;
        var offsetY = e.pageY - element.offsetTop;
        function move(e) {
            var ele = document.getElementById('ele');
            var width = 400-ele.clientWidth;
            var height = 400-ele.clientHeight;
            element.style.left = (e.pageX - offsetX) + 'px';
            element.style.top = (e.pageY - offsetY) + 'px';
        }
        function stop(e) {
            document.removeEventListener('mousemove', move);
            document.removeEventListener('mouseup', stop);
        }
        document.addEventListener('mousemove', move);
        document.addEventListener('mouseup', stop);
    });
}

function init() {
    var ele = document.getElementById('ele');
    draggable(ele);
}

and my html code which is not working is.. 和我的HTML代码是行不通的..

<body onload="init();">
    <div id="testdiv" style="position:relative;left:100px;overflow:hidden;border:1px solid #ccc;width:400px;height:400px">
        <img src="Desert.jpg" id="ele" style="position:absolute;"></img>
    </div>
</body>

and this code is working.. 并且此代码正在工作..

<body onload="init();">
    <div id="testdiv" style="position:relative;left:100px;overflow:hidden;border:1px solid #ccc;width:400px;height:400px">
        <div id="ele" style="width:100%; height:100%; background-color: gray; position:absolute; background-image:url( 'Desert.jpg' );"></div> 
    </div>
</body>

Answer 1

You could refer to this question, which handles the same idea of dragging images, althought the question is slightly different. 您可以参考这个问题，该问题处理拖动图像的想法相同，尽管问题略有不同。 Check out his/her JSFiddle from question. 从问题中查看他/她的JSFiddle。

Check it out here! 在这里查看！

Answer 2

<img> is a self-closing tag. <img>是一个自动关闭的标签。 You don't need the </img> as it's not valid. 您不需要</img>因为它无效。 Remove that and it should work fine. 删除它，它应该可以正常工作。 Depending on your doctype you should use: 根据您的doctype您应该使用：

HTML5 HTML5

<img src="Desert.jpg" id="ele" style="position:absolute;">

XHTML (note the / at the end of the tag) XHTML （注意标记末尾的/ ）

<img src="Desert.jpg" id="ele" style="position:absolute;" />

如何在div中制作可拖动图片？

问题描述

2 个解决方案

解决方案1
0 2014-07-25 08:36:43

解决方案2
-1 2014-07-25 08:26:35

如何在div中制作可拖动图片？

问题描述

2 个解决方案

解决方案1 0 2014-07-25 08:36:43

解决方案2 -1 2014-07-25 08:26:35

解决方案1
0 2014-07-25 08:36:43

解决方案2
-1 2014-07-25 08:26:35