需要默认选择一个角JS单选按钮 [英] Need to Default select an Angular JS Radio Button
问题描述
我是新来的角JS和我试图创建一组单选按钮。创建按钮是比较容易的部分，但我有搞清楚如何默认选择其中之一没有打破一切问题。我看了一下在角文档和多个其他计算器使用的问题，但ngChecked还是不太似乎看着办吧。
我需要做的是描述preselected之一，当用户来到该页面。价格，折扣，deal_value还需要从preselected price_option对象中的值显示。
下面是我试图去工作code： http://jsfiddle.net / qWzTb / 311 /
HTML code：
＆LT;机身NG-应用=demoApp＆GT;
＆LT; DIV NG控制器=DemoControllerNG-的init =的init（[{数量：1，价格：10，qty_description：记述1，打折：1％，deal_value：200}，{数量：2 ，价格：7，qty_description：记述2'，折扣：'5％'，deal_value：100}]）＆GT; ＆LT; DIV＆GT;
＆LT;标签NG重复=price_option在price_options＆GT;
＆LT;输入类型=电台NG-模式=init.price_optionNG值=price_optionNG-检查=selected_price_optionNAME =量/＆GT;
{{price_option.qty_description}}
＆LT; /标签＆gt;
＆LT; UL＆GT;
＆LT;立GT; {{init.price_option.price}}＆LT; /李＆GT;
＆LT;立GT; {{init.price_option.discount}}＆LT; /李＆GT;
＆LT;立GT; {{init.price_option.deal_value}}＆LT; /李＆GT;
＆LT; / UL＆GT;
＆LT; / DIV＆GT;
＆LT; / DIV＆GT;
＆LT; /身体GT;
使用Javascript：
angular.module（'demoApp'，[]）。控制器（'DemoController'，函数（$范围）{ $ scope.init =功能（价格）{
$ scope.price_options =价格;
$ scope.selected_price_option = $ scope.price_options [0];
};
}）;
HTML
＆LT;机身NG-应用=demoApp＆GT;
＆LT;！ - NG-初始化功能所属控制器 - ＆GT;
＆LT; DIV NG控制器=DemoController＆GT;
＆LT;！ - 移动NG-重复到容器div，而不是标签 - ＆GT;
＆LT; DIV NG重复=price_option在price_options＆GT;
＆LT;标签＆gt;
＆LT;！ - 该模型的范围变量保存选定的价值 - ＆GT;
＆LT;！ - 这个数值就是这个特殊选项的值 - ＆GT;
＆LT;输入类型=电台NG-模式=$ parent.selected_price_optionNG值=price_optionNAME =量/>{{price_option.qty_description}}</label>
＆LT; UL＆GT;
＆LT;李NG绑定=price_option.price＆GT;＆LT; /李＆GT;
＆LT;李NG绑定=price_option.discount＆GT;＆LT; /李＆GT;
＆LT;李NG绑定=price_option.deal_value＆GT;＆LT; /李＆GT;
＆LT; / UL＆GT;
＆LT; / DIV＆GT;
＆LT; / DIV＆GT;
＆LT; /身体GT;
JS
angular.module（'demoApp'，[]）。
控制器（'DemoController'，函数（$范围）{
//初始化移动逻辑CONTROLER
$ scope.price_options = [{
数量：1，
价格：10，
qty_description：记述1'，
折扣：1％，
deal_value：200
}，{
数量：2，
价格：7，
qty_description：记述2'，
折扣：'5％'，
deal_value：100
}];
$ scope.selected_price_option = $ scope.price_options [1];
}）;
叉形小提琴： http://jsfiddle.net/W8KH7/2/
或者你也可以使用对象的策略，以避免引用$父： http://jsfiddle.net/W8KH7/3/
I am new to Angular JS and I am trying to create a set of radio buttons. Creating the buttons was the easy part, but I am having problems figuring out how to default select one of them without breaking everything. I have read about using ngChecked in the Angular docs and on multiple other stackoverflow questions but still can't quite seem to figure it out.
What I need to do is have one of the descriptions preselected when the user comes to the page. The price, discount, and deal_value also need to be shown with the values from the preselected price_option object.
Here is the code that I am trying to get to work: http://jsfiddle.net/qWzTb/311/
HTML Code:
<body ng-app="demoApp">
<div ng-controller="DemoController" ng-init="init([{qty: 1, price:10, qty_description:'descrip 1', discount:'1%', deal_value:200}, {qty: 2, price:7, qty_description:'descrip 2', discount:'5%', deal_value:100}])">
<div>
<label ng-repeat="price_option in price_options">
<input type="radio" ng-model="init.price_option" ng-value="price_option" ng-checked="selected_price_option" name="quantity"/>
{{ price_option.qty_description }}
</label>
<ul>
<li>{{ init.price_option.price }}</li>
<li>{{ init.price_option.discount }}</li>
<li>{{ init.price_option.deal_value }}</li>
</ul>
</div>
</div>
</body>
Javascript:
angular.module('demoApp', []).controller('DemoController', function($scope) {
$scope.init = function(prices) {
$scope.price_options = prices;
$scope.selected_price_option = $scope.price_options[0];
};
});
HTML
<body ng-app="demoApp">
<!-- ng-init functionality belongs in controller -->
<div ng-controller="DemoController">
<!-- move ng-repeat to container div instead of label -->
<div ng-repeat="price_option in price_options">
<label>
<!-- the model is the scope variable holding the selected value -->
<!-- the value is the value of this particular option -->
<input type="radio" ng-model="$parent.selected_price_option" ng-value="price_option" name="quantity" />{{price_option.qty_description}}</label>
<ul>
<li ng-bind="price_option.price"></li>
<li ng-bind="price_option.discount"></li>
<li ng-bind="price_option.deal_value"></li>
</ul>
</div>
</div>
</body>
JS
angular.module('demoApp', []).
controller('DemoController', function ($scope) {
//moved init logic to controler
$scope.price_options = [{
qty: 1,
price: 10,
qty_description: 'descrip 1',
discount: '1%',
deal_value: 200
}, {
qty: 2,
price: 7,
qty_description: 'descrip 2',
discount: '5%',
deal_value: 100
}];
$scope.selected_price_option = $scope.price_options[1];
});
Forked fiddle: http://jsfiddle.net/W8KH7/2/
Or you can use the object strategy to avoid having to reference $parent: http://jsfiddle.net/W8KH7/3/
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