ionic angularjs 实现Enter键的提交

<input  type="text" placeholder="扫描需求单据二维码" ng-model="scaninfo.transfer_in_no" ng-enter="getTransfer(scaninfo.transfer_in_no);">

directives.js

angular.module('starter.directives',[])
    .directive('ngEnter', function() {
    return function(scope, element, attrs) {
        element.bind("keydown keypress", function(event) {
            if(event.which === 13) {
                scope.$apply(function(){
                    scope.$eval(attrs.ngEnter, {'event': event});
                });

                event.preventDefault();
            }
        });
    };
});

xxx.controller.js

$scope.getTransfer = function(transfer_in_no) {
    console.log('输入移转单！');
    TransferService.getTransferInside(transfer_in_no)
        .success(function (data) {
            $scope.items = data;
        })
        .error(function (err) {
            console.log('Could not get data');
        });
    TransferService.getTransferInsideHeader(transfer_in_no)
        .success(function (data) {
            $scope.trsf_type=data[0].DOC_NAME;
            $scope.trsf_from_warehouse_name=data[0].FROM_WAREHOUSE_NAME;
            $scope.trsf_from_warehouse_id=data[0].FROM_WAREHOUSE_ID;
            $scope.trsf_to_warehouse_name=data[0].TO_WAREHOUSE_NAME;
            $scope.trsf_to_warehouse_id=data[0].TO_WAREHOUSE_ID;
            $scope.trsf_remark=data[0].REMARK;
        })
        .error(function (err) {
            console.log('Could not get data');
        });
}