AngularJS 動態設定select的預設selected

遇到一個問題，在控制器裡設定了stafftype的預設值

.controller('InfoStaffCtrl', function($scope, $rootScope, $state, $log,$ionicLoading, $timeout,Manpower) {        //列表           $scope.search = {p:1,audittype:'',name:'',stafftype:'',companyname:''};        $scope.staffTypes = ["請選擇","飛行員","機務","航務","管理","空管","其他"];            $scope.doSearch = function(){            ...            //$scope.number = $scope.search.stafftype;            ...        }        function loadData(){            ...        }        loadData();    })

然後根據選擇stafftype的項進行loaddate，再點擊搜尋依然是預設的選項

經過搜尋參考這兩個連結1
2

添加angular的ng-selected

<label class="item item-input item-select">          <span class="input-label">人員分類</span>          <select ng-model="search.stafftype">            <option value="{{$index}}" ng-repeat="t in staffTypes" ng-selected="number==$index">{{t}}</option>                   </select>        </label>

當搜尋提交的stafftype值和頁面裡下拉選項value相等時，選中該值

PS：
更複雜的迴圈資料應該得搭配上ng-options吧，還沒試過