Question

我试图点击并拖动照片或图片并放在小猫图像上，它没有改变，但重定向到图像的链接。我该如何解决这个问题？代码应该让图像改变而不是将我重定向到链接。

<!DOCTYPE html>
<html>
<head>
    <title>Drag and Drop</title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
    <script>

    function dragStart(jQueryEvent) {
        // Store URL
        var dataTransfer = document.getElementsByTagName('img');
        jQueryEvent.dataTransfer.setData('Text', dataTransfer);
        // photo being dragged and dropped  with <img> tag and set the photo. 
    }
    function dragOver() {
        return false;   // Indicates that the element can be dropped onto
    }
    function drop(jQueryEvent) {
        // Update image and text box
        jQueryEvent.preventDefault();
        var dataTransfer = jQueryEvent.originalEvent.dataTransfer;
        document.getElementsByTagName('img').innerHTML = jQueryEvent.dataTransfer.getData('Text');     
    }

</script>
</head>
<body>
    <input type="text" style="width: 300px" value="http://placekitten.com/320/240" /><br />
    <img src="http://placekitten.com/320/240" style="border: 1px solid grey; min-width: 50px; min-height: 50px; display: inline-block;" />
</body>
</html>

Answer 1

使用src属性，而不是innerHTML：

$("img")[0].src = jQueryEvent.dataTransfer.getData('Text');

dragDrop = {
	keyHTML: '<a href="#" class="keyLink">#</a>',
	keySpeed: 10, // pixels per keypress event
	initialMouseX: undefined,
	initialMouseY: undefined,
	startX: undefined,
	startY: undefined,
	dXKeys: undefined,
	dYKeys: undefined,
	draggedObject: undefined,
	initElement: function (element) {
		if (typeof element == 'string')
			element = document.getElementById(element);
		element.onmousedown = dragDrop.startDragMouse;
		element.innerHTML += dragDrop.keyHTML;
		var links = element.getElementsByTagName('a');
		var lastLink = links[links.length-1];
		lastLink.relatedElement = element;
		lastLink.onclick = dragDrop.startDragKeys;
	},
	startDragMouse: function (e) {
		dragDrop.startDrag(this);
		var evt = e || window.event;
		dragDrop.initialMouseX = evt.clientX;
		dragDrop.initialMouseY = evt.clientY;
		addEventSimple(document,'mousemove',dragDrop.dragMouse);
		addEventSimple(document,'mouseup',dragDrop.releaseElement);
		return false;
	},
	startDragKeys: function () {
		dragDrop.startDrag(this.relatedElement);
		dragDrop.dXKeys = dragDrop.dYKeys = 0;
		addEventSimple(document,'keydown',dragDrop.dragKeys);
		addEventSimple(document,'keypress',dragDrop.switchKeyEvents);
		this.blur();
		return false;
	},
	startDrag: function (obj) {
		if (dragDrop.draggedObject)
			dragDrop.releaseElement();
		dragDrop.startX = obj.offsetLeft;
		dragDrop.startY = obj.offsetTop;
		dragDrop.draggedObject = obj;
		obj.className += ' dragged';
	},
	dragMouse: function (e) {
		var evt = e || window.event;
		var dX = evt.clientX - dragDrop.initialMouseX;
		var dY = evt.clientY - dragDrop.initialMouseY;
		dragDrop.setPosition(dX,dY);
		return false;
	},
	dragKeys: function(e) {
		var evt = e || window.event;
		var key = evt.keyCode;
		switch (key) {
			case 37:	// left
			case 63234:
				dragDrop.dXKeys -= dragDrop.keySpeed;
				break;
			case 38:	// up
			case 63232:
				dragDrop.dYKeys -= dragDrop.keySpeed;
				break;
			case 39:	// right
			case 63235:
				dragDrop.dXKeys += dragDrop.keySpeed;
				break;
			case 40:	// down
			case 63233:
				dragDrop.dYKeys += dragDrop.keySpeed;
				break;
			case 13: 	// enter
			case 27: 	// escape
				dragDrop.releaseElement();
				return false;
			default:
				return true;
		}
		dragDrop.setPosition(dragDrop.dXKeys,dragDrop.dYKeys);
		if (evt.preventDefault)
			evt.preventDefault();
		return false;
	},
	setPosition: function (dx,dy) {
		dragDrop.draggedObject.style.left = dragDrop.startX + dx + 'px';
		dragDrop.draggedObject.style.top = dragDrop.startY + dy + 'px';
	},
	switchKeyEvents: function () {
		// for Opera and Safari 1.3
		removeEventSimple(document,'keydown',dragDrop.dragKeys);
		removeEventSimple(document,'keypress',dragDrop.switchKeyEvents);
		addEventSimple(document,'keypress',dragDrop.dragKeys);
	},
	releaseElement: function() {
		removeEventSimple(document,'mousemove',dragDrop.dragMouse);
		removeEventSimple(document,'mouseup',dragDrop.releaseElement);
		removeEventSimple(document,'keypress',dragDrop.dragKeys);
		removeEventSimple(document,'keypress',dragDrop.switchKeyEvents);
		removeEventSimple(document,'keydown',dragDrop.dragKeys);
		dragDrop.draggedObject.className = dragDrop.draggedObject.className.replace(/dragged/,'');
		dragDrop.draggedObject = null;
	}
}

<强>参考

从其他Web浏览器拖动图像后图像不会更改

1 个答案: