angularjs - Angular ng-if 抛出 TypeError : Cannot read property '0' of null

我正在尝试使用 ng-if 显示和隐藏 html。当 $scope.isTokenValid 为假时，它工作正常。但是当 $scope.isTokenValid 为真时，我得到以下错误。请帮忙

TypeError: Cannot read property '0' of null
    at $parseFunctionCall (angular.js:12346)
    at Object.expressionInputWatch (angular.js:12754)
    at Scope.$get.Scope.$digest (angular.js:14235)
    at Scope.$get.Scope.$apply (angular.js:14506)
    at done (angular.js:9659)
    at completeRequest (angular.js:9849)
    at XMLHttpRequest.requestLoaded (angular.js:9790)

Controller

angular.module('clientApp')
    .controller('RegCtrl', function($scope, $routeParams, $http) {
    var url = "http://localhost:3000/signup/" + $routeParams.invitation_token;
    $http.get(url)
        .success(function(response) {
            $scope.isTokenValid = response.isValid;
        })
});

看法

<div class="row" ng-if="isTokenValid()">
     <h1>Valid</h1>
</div>
<div class="row" ng-if="!isTokenValid()">
     <h1>InValid</h1>
</div>

最佳答案

当 isTokenValid 实际上是一个属性时，您将其用作函数，请将其更改为:

<div class="row" ng-if="isTokenValid">
     <h1>Valid</h1>
</div>
<div class="row" ng-if="!isTokenValid">
     <h1>InValid</h1>
</div>

关于angularjs - Angular ng-if 抛出 TypeError : Cannot read property '0' of null，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28901552/