AngularJS'controller as'和form.$ valid [英] AngularJS 'controller as' and form.$valid

问题描述

我想检查角度控制器内的表单是否有效.使用$ scope时，这似乎很简单，但是我无法使其与"controller as"语法一起使用.

I want to check if a form is valid inside an angular controller. This seems straightforward when using $scope, but I can't get it to work with the 'controller as' syntax.

当我尝试访问form.$ valid时，出现错误消息无法读取未定义的属性'$ valid'" .

When I attempt to access form.$valid I get the error message "Cannot read property '$valid' of undefined".

plunkr: http://plnkr.co/edit/w54i1bZVD8UMhxB4L2JX?p=预览

HTML

<div ng-app="demoControllerAs" ng-controller="MainController as main">
  <form name="contactForm" novalidate>
    <p>
      <label>Email</label>
      <input type="email" name="email" ng-model="main.email" required />
    </p>
    <p>
      <label>Message</label>
      <textarea name="message" ng-model="main.message" required></textarea>
    </p>
    <input type="submit" value="submit" ng-click="main.submit()" />
  </form>
</div>

JS

var app = angular.module('demoControllerAs', []);

app.controller('MainController', [function () {
    var main = this;

    main.submit = function () {
        var isValid = main.contactForm.$valid;
        console.log(isValid);
    };
}]);

推荐答案

您可以按照@ ons-jjss的建议进行操作，但是如果您不想将$scope注入到控制器中，则只需将form名称更改为

You could do as @ons-jjss suggested but if you prefer not to inject $scope into you controller, then just change your form name as

<form name="main.contactForm" novalidate>

它会像魅力一样工作.

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