angularjavascript如何实现多选框分段全选效果如何实现

<div class="form-group1" style="margin-top: 15px;">
  <div class="input-group">
     <div class="input-group-addon no-border" style="padding-left: 0px;float: left;">
        <p>角色权限：</p>
    </div>
  </div>
</div>
<div class="" ng-repeat="todotype in todolist" style="margin-bottom: 30px;">
  <div class="" style="display: flex;">
    <div class="" style="background-color: rgb(229,172,78);width: 10%;padding: 1px 5px;line-height: 25px;height: 28px;">
      <input style="margin-bottom: 8px;" type="checkbox" ng-model="$parent.selectAll[$index]" ng-click="changeAll($index)" />
        <span style="color: white;font-weight: 600;">
        {{todotype.type}} 
        </span>
      </div>
  <div class="" style="padding-left: 24px;width: 100%;">
    <div class="row">
      <div class="col-md-2 col-sm-2" ng-repeat="obj in todolist[$index].permissionList" style="margin-bottom: 10px;">
        <input type="checkbox" ng-click="funcChange($parent.$index)" ng-model="obj.isSelected" /> 
          <span style="line-height: 25px;">{{obj.name}}</span>                          
      </div>
     </div>
    </div>
  </div>
</div>

// 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;
                });
            };