jQuery拖放颜色div来改变另一个的背景

问题描述

我有以下 HTML ，其中包含4个< div> 颜色，你可以从他们的 id 猜到。

I have the following HTML, containing 4 <div>'s - 2 are doors and 2 are colors, as you can guess from their id.

我想能够拖动颜色（例如左侧门上的蓝色和右侧的黑色），并更改样式上的背景颜色。

I'd like to be able to drag either colour to either door (such as blue on the left door and black on the right) and change the background colour on the style.

<div id="door1" style="background: #fff;"></div>
<div id="door2" style="background: #fff;"></div>
<div id="black"></div>
<div id="blue"></div>

我会感激，即使有人能指出我正确的方向。

I'd be grateful even if someone could point me in the right direction at least.

推荐答案

您应该初始化您的颜色< div> =http://jqueryui.com/draggable/ =nofollow> draggable and door < div> 'as 小部件。 drop pable（）方法。

You should initialize your color <div>'s as draggable and door <div>'s as droppable widgets using .draggable() and .droppable() methods respectively.

然后您可以使用事件处理程序颜色。在处理程序中，您可以使用 this 访问droppable，并使用 ui.draggable 拖动元素，如下所示：

Then you can use the drop event handler of droppable for changing the background color. Inside the handler, you can access the droppable using this and dragged element using ui.draggable as shown below:

$(".color").draggable({
  revert:true
});
$(".door").droppable({
  drop: function(e, ui) {
    console.log(ui.draggable)
    $(this).css("background-color", ui.draggable.attr("id"));
  }
});

.door {
  display: inline-block;
  width: 50px;
  height: 120px;
  border: 1px solid;
  margin: 5px;
}
.color {
  float: right;
  width: 50px;
  height: 50px;
}
.white {
  background: #fff;
}
#black {
  background: #000;
}
#blue {
  clear: left;
  background: royalblue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//code.jquery.com/ui/1.11.2/jquery-ui.min.js"></script>
<div id="door1" class="door white"></div>
<div id="door2" class="door white"></div>
<div id="black" class="color"></div>
<div id="blue" class="color"></div>

/ code>

我删除了内联css和使用css类，这样，你可以避免样式的重复和保持你的HTML干净。您可以阅读有关为什么使用CSS @ MDN

Side note: I've removed the inline css and is using css classes, So that you can avoid duplication of styles and keep your HTML clean. You can read more about Why Use CSS @ MDN

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