错误信息提示

<div ng-if="vm.errormsg1 != ''" style="padding: 0px;">
             <a class="button button-block icon-right ion-ios-close-outline button-assertive" style="font-size: 9px; border-radius: 0px; margin-top: 0px; margin-bottom: 0px;" ng-click="Clean1()">{{vm.errormsg1}}</a>
         </div>

vm.errormsg1 = '';

$scope.Clean1 = function () {
        vm.errormsg1 = '';
    };

    $scope.scrollTop = function () {
        $ionicScrollDelegate.scrollTop(true);
    };
    $scope.scrollBottom = function () {
        $ionicScrollDelegate.scrollBottom(true);
    };

//使用
vm.errormsg1 = $rootScope.error1;
$ionicScrollDelegate.scrollTop();