如何使用AngularJS将html输入标记中的数据绑定到javascript对象?

时间:2015-07-03 16:49:33

标签: javascript html angularjs ionic-framework angularjs-bindings

我是使用AngularJS的新手,所以我不太清楚实现目标的最佳方法是什么。我想要做的是在我的hmtl中有一个输入标签的网格,其中type = number并设置它,以便每当值递增时,新对象将附加到列表中。同样,当它递减(它不能低于0)时,从列表中删除该类型的对象。

使用此代码,每当我增加输入框时,{}}会在底部显示该更改。但是,我不清楚我实际上是在绑定什么。每当用户递增输入框时,我不知道如何制作新的foo1对象。

这是我的代码:

var app = angular.module('FooTools', ['ionic'])

app.run(function($ionicPlatform) {
  $ionicPlatform.ready(function() {
    if(window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
    }
    if(window.StatusBar) {
      StatusBar.styleDefault();
    }
  });


})

app.controller('fooCtrl', function($scope) {
	//I want to bind foo objects to these lists
    $scope.foo1 = [];
	$scope.foo2 = [];
});
<!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="lib/ionic/js/ionic.bundle.js"></script>

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

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

<body ng-app="FooTools">
	<ion-pane>
		<ion-header-bar class="bar-positive">
			<h1 class="title"><b>Foo Tools</b></h1>
		</ion-header-bar>
		<ion-content>
			<div class="main-div">
				<div ng-controller="fooCtrl"><br>
					<div class="row">
						<div class="col">
							Column 1:
						</div>
						<div class="col">
							Column 2:
						</div>
					</div>
					<div class="row">
						<div class="col">
							<label class="item-input">
								object1:&nbsp;	 <input type="number" ng-model="foo1"><br>
							</label>
						</div>
						<div class="col">
							<label class="item-input">
								object2:&nbsp;	 <input type="number" ng-model="foo2"><br>
							</label>
						</div>
					</div>
					Foo: {{foo1 + " foo1, " + foo2 + " foo2"}}
				</div>
			</div>
		</ion-content>
	</ion-pane>
</body>
</html>

另外,这是我的foo1对象构造函数,如果有帮助:

function unit(value) {
this.value = value;
}

有谁知道如何做到这一点或更好地了解如何实现这一目标? (并不是说这有所不同,但这是一个离子项目。)

2 个答案:

答案 0 :(得分:1)

如何绑定&#34; ng-change&#34;输入?例如:

<input type="number" ng-change="checkValues("foo1", fooN1)" ng-model="fooN1">
<input type="number" ng-change="checkValues("foo2", fooN2)" ng-model="fooN2">

在你的控制器里面

$scope.checkValues = function (a, b) {
  if (a in $scope) {
    if ($scope[a].length < b) { // If length is smaller that the number
      $scope[a].push({}); //Adds the new object to the array
    } else {
      //Removes the last element of the array
      $scope[a].pop();
    }
  }
}

希望这有帮助

答案 1 :(得分:0)

我不确定我是否完全理解你在这里要完成的任务,但请尝试以下修复(基于我迄今所理解的内容):

//in your DOM
<label class="item-input">
    object1:     <input type="number" ng-model="data.foo1">
                     <button ng-click="addToList(data.foo1)"> + </button>
                     <button ng-click="removeFromList(data.foo1)"> - </button>
</label>

//in your controller
//initialize data
$scope.data=[{foo1:0, foo2:0}];
//func to add obj to list when the value incremented
$scope.addToList = function (obj){
     $scope.data.foo1 ++;
     $scope.foo1List.push(obj);//add to your foo1 list
}
$scope.removeFromList = function (obj){
     $scope.data.foo1 --;
     // you can use $scope.foo1List.splice to remove from your array list
}

希望这有帮助!