Javascript angularjs中的另一个函数无法识别函数

在使用控制器加载部分Html时，将识别名为

$scope.actionViewVisitors（）

的函数，并在运行时不会出现错误。但每当我在同一控制器上的另一个函数中使用它时，它就会给我一个错误：

TypeError:$scope.actionViewVisitors不是一个函数

。请参阅下面我的代码：

angular.module("Visitor.controller", [])

// ============== Controllers
.controller("viewVisitorController", function ($scope, $rootScope, $http, viewVisitorService, viewAccountService, DTOptionsBuilder) {
    $scope.visitorList = null;

    $scope.viewAccountDetail = null;
    $scope.avatar = null;

    $scope.visitorDetail = null;

    $scope.visitorBtn = "Create";

    $scope.actionViewAccount = function () {
        $scope.actionViewAccount = viewAccountService.serviceViewAccount()
        .then(function (response) {
            $scope.viewAccountDetail = response.data.account;
            $scope.avatar = "../../avatars/" + response.data.account.AccountId + ".jpg";
        })
    }

    $scope.dtOptions = DTOptionsBuilder.newOptions()
        .withDisplayLength(10)
        .withOption('bLengthChange', false);

    // THIS ONE IS NOT RECOGNIZED    
    $scope.actionViewVisitors = function () {
        $scope.actionViewVisitors = viewVisitorService.serviceViewVisitors()
            .then(function (response) {
            debugger;
                $scope.visitorList = response.data.visitorList;
            });
    }

    // I DON'T GET ANY ERROR HERE
    $scope.actionViewVisitors();
    $scope.actionViewAccount();

    $scope.createVisitor = function () {
        $scope.statusMessage = null;
        if ($scope.visitorBtn == "Create") {
            $scope.createVisitor = viewVisitorService.serviceCreateVisitor($scope.visitorDetail)
                .then(function (response) {
                    if (response.data.response == '1') {
                        bootbox.alert({
                            message: "Successfully created a new visitor.",
                            size: 'small',
                            classname: 'bb-alternate-modal'
                        });
                    } else if (response.data.response == '0') {
                        bootbox.alert({
                            message: "Failed in creting visitor.",
                            size: 'small',
                            classname: 'bb-alternate-modal'
                        });
                    }
                });
            debugger;
            $scope.visitorDetail = undefined;
            // I GET THE ERROR WHEN I CALL THIS METHOD
            $scope.actionViewVisitors();
        }
    }
})

// ============== Factories
.factory("viewVisitorService", ["$http", function ($http) {
    var fac = {};

    fac.serviceViewVisitors = function () {
        return $http({
            url: '/Visitor/ViewVisitors',
            method: 'get'
        });
    }

    fac.serviceCreateVisitor = function(visitor) {
        return $http({
            url: '/Visitor/CreateVisitor',
            data: { visitor: visitor },
            method: 'post'
        });
    }

    return fac;
}])

---

您正在用下一行中的

Promise

覆盖函数，因此错误是正确的

$scope.actionViewVisitors = function () {
    $scope.actionViewVisitors = viewVisitorService.serviceViewVisitors() 
        .then(function (response) {
           $scope.visitorList = response.data.visitorList;
        });
}

删除

$scope.actionViewVisitors=

$scope.actionViewVisitors = function () {
    viewVisitorService.serviceViewVisitors() 
        .then(function (response) {
           $scope.visitorList = response.data.visitorList;
        });
}

---

您正在用下一行中的

Promise

覆盖函数，因此错误是正确的

$scope.actionViewVisitors = function () {
    $scope.actionViewVisitors = viewVisitorService.serviceViewVisitors() 
        .then(function (response) {
           $scope.visitorList = response.data.visitorList;
        });
}

删除

$scope.actionViewVisitors=

$scope.actionViewVisitors = function () {
    viewVisitorService.serviceViewVisitors() 
        .then(function (response) {
           $scope.visitorList = response.data.visitorList;
        });
}

---

在第一次调用函数时，您将其从函数更改为承诺。也许你想返回结果

$scope.actionViewVisitors = function () {
    return viewVisitorService.serviceViewVisitors()
        .then(function (response) {
        debugger;
            $scope.visitorList = response.data.visitorList;
        });
}

---

在第一次调用函数时，您将其从函数更改为承诺。也许你想返回结果

$scope.actionViewVisitors = function () {
    return viewVisitorService.serviceViewVisitors()
        .then(function (response) {
        debugger;
            $scope.visitorList = response.data.visitorList;
        });
}