angularjs 实现多选框分段全选效果

• 在前台开发过程中，列表批量选择是一个开发人员经常遇到的功能，列表批量选择的实现方式很多，但是原理基本相同，本文主要来讲AngularJs如何简单的实现列表批量选择功能。

• 效果如下

  
  

  image.png

• 首先来看html代码

<div class="form-group1" >
  <div class="input-group">
     <div class="input-group-addon no-border" >
        <p>角色权限：</p>
    </div>
  </div></div><div class="" ng-repeat="todotype in todolist" >
                
  <div class="" >

    <div class="" >

      <input  type="checkbox" ng-model="$parent.selectAll[$index]" ng-click="changeAll($index)" />
        <span >
        {{todotype.type}} 
        </span>
      </div>
  <div class="" >
    <div class="row">
      <div class="col-md-2 col-sm-2" ng-repeat="obj in todolist[$index].permissionList" >
        <input type="checkbox" ng-click="funcChange($parent.$index)" ng-model="obj.isSelected" /> 
          <span >{{obj.name}}</span>                          
      </div>
     </div>
    </div>
  </div></div>

• html里面简单建立一个表格，与批量选择相关的只有两处。
  一处是ng-click="changeAll($index)，用来做全选的操作;
  ng-click="funcChange($parent.$index)"用来判断当前大类里内容是否被全选。

• 判断是否全选是用ng-model进行判断 第一处ng-model="$parent.selectAll[$index]"是判断这一大类是否全选；
  ng-model="obj.isSelected"是判断每一大类的每一项的选择；

• 接下来是控制器里的代码也就是js文件

// 获取数据 这里具体post请求就不写了 
                   $scope.todolist = res.data.data;                        for(var i = 0; i < $scope.todolist.length; i++) {
                            angular.forEach($scope.todolist[i].permissionList, function(i) {
                                i.isSelected = false;

                            })

                        }// 数据类型如下

    $scope.list = [{
                permissionList: [{
                        name: 'Golde',                        //                  birthday: '2000-01-10',
                        isSelected: false
                    },
                    {
                        name: 'King',                        //                  birthday: '1990-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Mark',                        //                  birthday: '19890-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Marie',                        //                  birthday: '2010-01-10',
                        isSelected: false
                    }

                ],
                type: "制造资源管理"
            }, {
                permissionList: [{
                        name: 'Golde1',                        //                  birthday: '2000-01-10',
                        isSelected: false
                    },
                    {
                        name: 'King1',                        //                  birthday: '1990-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Mark1',                        //                  birthday: '19890-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Marie1',                        //                  birthday: '2010-01-10',
                        isSelected: false
                    }

                ],
                type: "制造资源管理2"
            }, {
                permissionList: [{
                        name: 'Golde2',                        //                  birthday: '2000-01-10',
                        isSelected: false
                    },
                    {
                        name: 'King2',                        //                  birthday: '1990-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Mark2',                        //                  birthday: '19890-01-10',
                        isSelected: false
                    },
                    {
                        name: 'Marie2',                        //                  birthday: '2010-01-10',
                        isSelected: false
                    }

                ],
                type: "制造资源管理3"
            }];// 具体方法如下所示

       // 这里初始化数组 上来全为空
             $scope.selectAll = [];            
            //      对于对象进行操作的时候(点击)，会执行funcChange  
            //      判断对象数组中isSelected 是否为 true或false，在决定select是否为true  
            $scope.changeAll = function(index) { //全选/取消全选      
                angular.forEach($scope.todolist[index].permissionList, function(v, k) {
                    v.isSelected = $scope.selectAll[index];
                })
            };


            $scope.funcChange = function(index) { // 当所有都选中时  
                $scope.selectAll[index] = true;
                angular.forEach($scope.todolist[index].permissionList, function(v, k) {
                    $scope.selectAll[index] = $scope.selectAll[index] && v.isSelected;
                });
            };

具体逻辑已经写得很清楚 不懂得地方或者不好的地方欢迎在在评论多多评论！

作者：Skywang
链接：https://www.jianshu.com/p/492e3a4a3337