Angularjs the default selected for dynamically set Select

Encountered a problem, set the Stafftype default value in the controller

. Controller (' Infostaffctrl ', function ($scope, $rootScope, $state, $log, $ionicLoading, $timeout, Manpower) {

        //List   
        $scope. Search = {p:1,audittype: ', Name: ', Stafftype: ', CompanyName: '};
        $scope. stafftypes = ["Please select", "Pilot", "locomotive", "Shipping", "management", "Air pipe", "other"];    
        $scope. Dosearch = function () {
            ...
            $scope. Number = $scope. Search.stafftype;
            ...
        }
        function LoadData () {
            ...
        }
        LoadData ();

    })

And then click on the search is still the default option, depending on the item selected Stafftype loaddate

After searching for references to these two links 1
2

Add a angular ng-selected

<label class= "Item item-input item-select" >
          <span class= "Input-label" > Personnel category </span>
          < Select Ng-model= "Search.stafftype" >
            <option value= "{{$index}}" ng-repeat= "T in Stafftypes" ng-selected= " number== $index ">{{t}}</option>         
          </select>
        </label>

When the Stafftype value of the search submission is equal to the Drop-down option value in the page, select the value

Ps:
More complex circular data should be paired with Ng-options.