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I just have experience, so let me think about it differently:
1: The select all button is a checkbox, and the other sub-buttons are lists of multiple checkboxes;
2: The checkbox of the sub-button is also bound to the checked value of the object when repeating (the default is / Does not exist/i.e. flase/i.e. not selected)
3: Add two extension methods to the array

（1）：// 設(shè)置元素及子元素的選擇狀態(tài)（可關(guān)聯(lián)自身所有子級）
    Array.prototype.setCheck = function (value, children) {
      var set_check = function (main) {
        for (var i = 0; i < main.length; i++) {
          main[i].checked = value;
          if (children && main[i][children]) {
            set_check(main[i][children]);
          }
        }
      };
      set_check(this);
    };
    
 （2）：// 將元素中所有級別子元素中被選中的元素的id打包為一個數(shù)組
    Array.prototype.checked = function (children, id_key) {
    
      var ids = [];
      var find_check;
    
      if (arguments.length < 2) {
        find_check = function (main) {
          for (var i = 0; i < main.length; i++) {
            if (main[i].checked) {
              ids.push(main[i].id);
            };
            if (!!children && main[i][children]) {
              find_check(main[i][children]);
            }
          }
        };
      } else {
        find_check = function (main) {
          for (var i = 0; i < main.length; i++) {
            if (main[i].checked) {
              ids.push(main[i][id_key]);
            };
            if (!!children && main[i][children]) {
              find_check(main[i][children]);
            }
          }
        };
      };
    
      find_check(this);
      return ids;
    };

4: Bind the extension event (1) to the select all button, and use the extension event (2) to get the id of the selected element

Demo:

// js
$scope.list = [
    {
        id: 1,
        children: [...]
    }, {
        id: 2,
        children: [...]
    },
    ...
];

< !-- html/check-all -- >
<label>
    <input class="check-all" 
           type="checkbox"
           ng-model="check_all"
           ng-change="list.setCheck(check_all, 'children')">
    <span></span>
</label>

< !-- html/check-item -- >
<li class="checkbox" ng-repeat="item in list">
     <label>
        <input type="checkbox" 
               name="item[{{ $index }}]" 
               ng-model="item.checked"
               ng-change="item.children.setCheck(item.checked, 'children')"> 
               < !-- 如果是只有一級數(shù)據(jù)的話，此處無需再綁定自身子級 -- >
     </label>
</li>

Get the selected value:

// 一級數(shù)據(jù)
$scope.checked_ids = $scope.list.checked(); // return [1,32,4,...]
// 多級別數(shù)據(jù)
$scope.checked_ids = $scope.list.checked('children'); // return [1,32,4,...]

// 如果需要轉(zhuǎn)字符串
$scope.checked_ids = $scope.list.checked('children').join(','); // return "1,32,4"

http://stackoverflow.com/questions/12648466/how-can-i-get-angular-js-checkboxes-with-select-unselect-all-functionality-and-i

http://stackoverflow.com/questions/14514461/how-to-bind-to-list-of-checkbox-values-with-angularjs