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,$event拖拽元素事件对象
- ng-drag-data:拖拽数据
官方链接：https://github.com/fatlinesofcode/ngDraggable
在拖拽进行元素排序时，只需动态更改下循环数组元素顺序；具体事件绑定drop绑定在父元素，drag绑定在子元素即可，具体实现代码如下：
1 <!DOCTYPE html> 2 <html lang="en"> 3 4 <head> 5 <meta charset="UTF-8"> 6 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 7 <meta http-equiv="X-UA-Compatible" content="ie=edge"> 8 <style> 9 .drag-container { 10 display: flex; 11 justify-content: flex-start; 12 align-items: center; 13 } 14 15 .drag-container .drag-box { 16 display: flex; 17 align-items: center; 18 justify-content: center; 19 200px; 20 height: 200px; 21 margin: 20px; 22 color: #fff; 23 font-size: 20px; 24 font-weight: bold; 25 } 26 27 .drag-container .drag-box .drag-item { 28 display: flex; 29 align-items: center; 30 justify-content: center; 31 150px; 32 height: 150px; 33 } 34 </style> 35 <title>ng-dragger</title> 36 </head> 37 38 <body ng-app="app" ng-controller="draggerController"> 39 <div class="drag-container"> 40 <div ng-repeat="item in dragArr" class="drag-box" ng-drop="true" ng-drop-success="onDropComplete($index, $data, $event)"> 41 <div class="drag-item" ng-drag="true" ng-drag-data="{{item}}" ng-style="{background: item.color}">{{item.text}}</div> 42 </div> 43 </div> 44 45 <script src="https://cdn.bootcss.com/angular.js/1.3.1/angular.js"></script> 46 <script src="https://cdn.bootcss.com/ngDraggable/0.1.11/ngDraggable.js"></script> 47 <script> 48 var myApp = angular.module('app', ['ngDraggable']); 49 myApp.controller('draggerController', function($scope) { 50 $scope.dragArr = [{ 51 text: '方块1', 52 color: 'green', 53 key: 'arr1' 54 }, { 55 text: '方块2', 56 color: 'blue', 57 key: 'arr1' 58 }, { 59 text: '方块3', 60 color: '#888', 61 key: 'arr1' 62 }, { 63 text: '方块4', 64 color: '#888', 65 key: 'arr2' 66 }, { 67 text: '方块5', 68 color: '#888', 69 key: 'arr2' 70 }, { 71 text: '方块6', 72 color: '#888', 73 key: 'arr2' 74 }]; 75 76 $scope.onDropComplete = function(index, obj, $event) { 77 var otherObj = $scope.dragArr[index]; 78 var otherIndex = $scope.dragArr.findIndex(vv => Object.is(vv.text, obj.text)); 79 if (otherObj.key !== obj.key) return; 80 $scope.dragArr[index] = obj; 81 $scope.dragArr[otherIndex] = otherObj; 82 } 83 84 }) 85 </script> 86 </body> 87 88 </html>
效果图如下：