Question

我使用的工具：我正在使用离子，我使用chrome和ubutu os。

我正在尝试为数据绑定做一个演示项目请检查我的plunknr https://plnkr.co/edit/CFSgfWDH5UY0XaDjRoBK?p=preview

这里我试图将用户输入的数据绑定到formPost对象，但是在console.log中我得到像（{Username: undefined, Name: undefined, EmailID: undefined, Password: undefined}）一样的未定义，如果有人发现任何错误请告诉我

Answer 1

这是 HTMl

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
    <title></title>

    <link href="lib/ionic/css/ionic.css" rel="stylesheet">
    <link href="css/style.css" rel="stylesheet">

    <!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
    <link href="css/ionic.app.css" rel="stylesheet">
    -->

    <!-- ionic/angularjs js -->
    <script src="ionic.bundle.js"></script>

    <!-- cordova script (this will be a 404 during development) -->
    <script src="cordova.js"></script>

    <!-- your app's js -->
    <script src="app.js"></script>
  </head>
  <body ng-app="starter">

    <ion-pane ng-controller="formValidation">
      <ion-header-bar class="bar-stable">
        <h1 class="title">Ionic Blank Starter</h1>
      </ion-header-bar>
      <ion-content>
        <div class="list">
          <label class="item item-input item-stacked-label">
            <span class="input-label">User Name</span>
            <input type="text" placeholder="John" ng-model="username">
          </label>
          <label class="item item-input item-stacked-label">
            <span class="input-label">Name</span>
            <input type="text" placeholder="Suhr" ng-model="name">
          </label>
          <label class="item item-input item-stacked-label">
            <span class="input-label">Email</span>
            <input type="text" placeholder="john@suhr.com" ng-model="emailid">
          </label>
          <label class="item item-input item-stacked-label">
            <span class="input-label">Password</span>
            <input type="text" placeholder="john@suhr.com" ng-model="password">
          </label>
        </div>
        <button class="button button-block button-positive" ng-click="submit(username,name,emailid,password)">
          sign up
        </button>
      </ion-content>
    </ion-pane>
  </body>
</html>

<强> JS

// Ionic Starter App

// angular.module is a global place for creating, registering and retrieving Angular modules
// 'starter' is the name of this angular module example (also set in a <body> attribute in index.html)
// the 2nd parameter is an array of 'requires'
angular.module('starter', ['ionic'])

.run(function($ionicPlatform) {
  $ionicPlatform.ready(function() {
    if(window.cordova && window.cordova.plugins.Keyboard) {
      // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
      // for form inputs)
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);

      // Don't remove this line unless you know what you are doing. It stops the viewport
      // from snapping when text inputs are focused. Ionic handles this internally for
      // a much nicer keyboard experience.
      cordova.plugins.Keyboard.disableScroll(true);
    }
    if(window.StatusBar) {
      StatusBar.styleDefault();
    }
  });
})

.controller('formValidation',function($scope,$http){

  $scope.submit=function(username,name,emilid,password){

    var formPost = {
      "Username":username,
      "Name":name,
      "EmailID":emilid,
      "Password":password
    };
    console.log(formPost);
    $http.post("http://aflaree.com/qrcodeservice/Service1.svc/Signupsupervisor",formPost)
      .success(function(response){
        console.log(response);
      })
      .error(function(response){
        console.log(response);
      });
  };
});

工作Pluknr

修改

在纯 Angular 中，您在问题中显示的方式将会有效，您可以看到此JsFiddle以供参考。

但是在进入离子时，这可能无法按预期工作，因为由于在Ionic源代码中定义了该指令的方式，因此该问题与ion-content有关。它专门创建了自己的子女范围。

.directive('ionContent', [ '$parse', '$timeout', '$ionicScrollDelegate', '$controller', '$ionicBind', function($parse, $timeout, $ionicScrollDelegate, $controller, $ionicBind) { return { restrict: 'E', replace: true, transclude: true, require: '^?ionNavView', scope: true, template: '<div class="scroll-content">' + '<div class="scroll"></div>' + '</div>',

由于这一点以及继承在JavaScript中的工作方式，您不能使用双向绑定。基本上你的$ scope.submit是在你的控制器中定义的，并且只是作为离子内容范围的新原语创建的。它不像对象那样被引用复制。

阅读this article。理解这一切如何运作并克服这些问题至关重要。

Answer 2

首先，你的＆＃34; EmailID＆＃34;：$ scope.emilid，它应该是$ scope.emailid

问题出在ng-controller上，应将其定义为<ion-content>的子项，您可以查看以下代码：

HTML：

<body ng-app="starter">

<ion-pane >
  <ion-header-bar class="bar-stable">
    <h1 class="title">Ionic Blank Starter</h1>
  </ion-header-bar>
  <ion-content>
    <div ng-controller="formValidation">
      <div class="list">
        <label class="item item-input item-stacked-label">
          <span class="input-label">User Name</span>
          <input type="text" placeholder="John" ng-model="username">
        </label>
        <label class="item item-input item-stacked-label">
          <span class="input-label">Name</span>
          <input type="text" placeholder="Suhr" ng-model="name">
        </label>
        <label class="item item-input item-stacked-label">
          <span class="input-label">Email</span>
          <input type="text" placeholder="john@suhr.com" ng-model="emailid">
        </label>
        <label class="item item-input item-stacked-label">
          <span class="input-label">Password</span>
          <input type="text" placeholder="john@suhr.com" ng-model="password">
        </label>
      </div>
      <button class="button button-block button-positive" ng-click="submit()">
        sign up
      </button>
    </div>
  </ion-content>
</ion-pane>

角：

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

app.controller('formValidation', function($scope) {

  $scope.submit=function(){
    var formPost = {
      "Username":$scope.username,
      "Name":$scope.name,
      "EmailID":$scope.emailid,
      "Password":$scope.password
    };
    console.log(formPost);
    }

});

Answer 3

将数据绑定到HTML模板的最简单方法如下：

模板：

<input [(ngModel)]="name">

.ts code:
name:any= "Tanzeel"

因此[()]用于双向绑定。

如何使用双向数据绑定离子＆amp; angularjs

3 个答案: