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>
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