Angularjs ng更改在ui-select2中不起作用

当我在下拉列表中更改选择时，不触发更改 下面是我的html和js代码

                            <ui-select ng-model="DemandLine.SupplierId" theme="select2" ng-change="GetSupplierInfo()">
                                <ui-select-match allow-clear="true" placeholder="Select or search supplier in the list...">{{$select.selected.SupplierName}}</ui-select-match>
                                <ui-select-choices repeat="supplier.Id as supplier in (Suppliers | filter: $select.search)">
                                    <span ng-bind-html="supplier.SupplierName | highlight: $select.search"></span>
                                </ui-select-choices>
                            </ui-select>


$scope.GetSupplierInfo = function () {
    var _supplier = _.find($scope.Suppliers, function (data) { return (data.Id == $scope.DemandLine.SupplierId) });
    if (_supplier != undefined && _supplier != null && _supplier.Active == true) {
        $scope.DemandLine.SupplierId = _supplier.Id;
        $scope.DemandLine.Supplier = _supplier.SupplierName;
    }
    else {
        $scope.DemandLine.SupplierId = null;
        $scope.DemandLine.Supplier = null;
    }
    $scope.setStatus();
}

{{$select.selected.SupplierName}
$scope.GetSupplierInfo=函数（）{
var_supplier=u.find（$scope.Suppliers，函数（数据）{return（data.Id==$scope.DemandLine.SupplierId）}）；
如果（_supplier！=未定义&&&u supplier！=空&&u supplier.Active==真）{
$scope.DemandLine.SupplierId=\u supplier.Id；
$scope.DemandLine.Supplier=\u Supplier.SupplierName；
}
否则{
$scope.DemandLine.SupplierId=null；
$scope.DemandLine.Supplier=null；
}
$scope.setStatus（）；
}

您应该在选择时使用

，而不是
ng change，后者是一个角度指令

<ui-select ng-model="DemandLine.SupplierId" theme="select2" on-select="GetSupplierInfo()">