Question

我需要建立一个系统来根据所选票数改变总价。我创建了一些单选按钮来选择票数。问题是默认值未设置，加载时结果为空。

<input type="radio" ng-model="people" value="1" checked="checked"><label>1</label>
<input type="radio" ng-model="people" value="2"><label>2</label>
<input type="radio" ng-model="people" value="3"><label>3</label>
<ul>
  <li>{{10*people}}€</li>
  <li>{{8*people}}€</li>
  <li>{{30*people}}€</li>
</ul>

Please see my jsfiddle.

Answer 1

使用ngInit

为people设置默认值

<div ng-app>
    <div ng-init="people=1" />
        <input type="radio" ng-model="people" value="1"><label>1</label>
        <input type="radio" ng-model="people" value="2"><label>2</label>
        <input type="radio" ng-model="people" value="3"><label>3</label>
    <ul>
        <li>{{10*people}}€</li>
        <li>{{8*people}}€</li>
        <li>{{30*people}}€</li>
    </ul>
</div>

演示：Fiddle

Answer 2

<div ng-app="" ng-controller="myCntrl">    
        <input type="radio" ng-model="people" value="1"/><label>1</label>
        <input type="radio" ng-model="people" value="2"/><label>2</label>
        <input type="radio" ng-model="people" value="3"/><label>3</label>
</div>
<script>
    function myCntrl($scope){
        $scope.people=1;
    }
</script>

Answer 3

为什么不只是ng-checked="true"

Answer 4

在Angular 2中，我们可以设置单选按钮的默认值：

HTML：

<label class="form-check-label">
          <input type="radio" class="form-check-input" name="gender" 
          [(ngModel)]="gender" id="optionsRadios1" value="male">
          Male
</label>

在Component Class中，将'gender'变量的值设置为等于单选按钮：

gender = 'male';

Answer 5

<input type="radio" name="gender" value="male"<%=rs.getString(6).equals("male") ? "checked='checked'": "" %>: "checked='checked'" %> >Male
               <%=rs.getString(6).equals("male") ? "checked='checked'": "" %>

如何在AngularJS中设置单选按钮的默认值？

5 个答案: