基于AngularJS拖拽插件ngDraggable.js实现拖拽排序功能
时间：2021-11-25 11:33:23 | 栏目：AngularJS | 点击：次
ngDraggable.js是一款比较简单实用的angularJS拖拽插件，借助于封装好的一些自定义指令，能够快速的进行一些拖拽应用开发。首先先介绍一些基本的概念;
•ng-drop:是否允许放入拖拽元素
•ng-drop-success($data, $event):拖拽元素放入的回调;$data：放入元素数据；$event拖拽事件对象
•ng-drag:元素是否允许拖拽
•ng-drag-success($data, $event):$data:拖拽元素数据,$event拖拽元素事件对象
•ng-drag-data:拖拽数据
官方链接：https://github.com/fatlinesofcode/ngDraggable
在拖拽进行元素排序时，只需动态更改下循环数组元素顺序；具体事件绑定drop绑定在父元素，drag绑定在子元素即可，具体实现代码如下：
效果图如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<style>
.drag-container {
display: flex;
justify-content: flex-start;
align-items: center;
}
.drag-container .drag-box {
display: flex;
align-items: center;
justify-content: center;
width: 200px;
height: 200px;
margin: 20px;
color: #fff;
font-size: 20px;
font-weight: bold;
}
.drag-container .drag-box .drag-item {
display: flex;
align-items: center;
justify-content: center;
width: 150px;
height: 150px;
}
</style>
<title>ng-dragger</title>
</head>
<body ng-app="app" ng-controller="draggerController">
<div class="drag-container">
<div ng-repeat="item in dragArr" class="drag-box" ng-drop="true" ng-drop-success="onDropComplete($index, $data, $event)">
<div class="drag-item" ng-drag="true" ng-drag-data="{{item}}" ng-style="{background: item.color}">{{item.text}}</div>
</div>
</div>
<script src="https://cdn.bootcss.com/angular.js/1.3.1/angular.js"></script>
<script src="https://cdn.bootcss.com/ngDraggable/0.1.11/ngDraggable.js"></script>
<script>
var myApp = angular.module('app', ['ngDraggable']);
myApp.controller('draggerController', function($scope) {
$scope.dragArr = [{
text: '方块1',
color: 'green',
key: 'arr1'
}, {
text: '方块2',
color: 'blue',
key: 'arr1'
}, {
text: '方块3',
color: '#888',
key: 'arr1'
}, {
text: '方块4',
color: '#888',
key: 'arr2'
}, {
text: '方块5',
color: '#888',
key: 'arr2'
}, {
text: '方块6',
color: '#888',
key: 'arr2'
}];
$scope.onDropComplete = function(index, obj, $event) {
var otherObj = $scope.dragArr[index];
var otherIndex = $scope.dragArr.findIndex(vv => Object.is(vv.text, obj.text));
if (otherObj.key !== obj.key) return;
$scope.dragArr[index] = obj;
$scope.dragArr[otherIndex] = otherObj;
}
})
</script>
</body>
</html>
总结