Javascript 动态创建单选按钮和选定的适当按钮Angularjs

我有一个问卷表，在问题和答案之间循环，然后创建带有答案的单选按钮。answer对象将具有Answeed属性，该属性将为true或false，具体取决于之前是否为该项选择了该答案。如果answer.answered=true，则应选中该单选按钮（只有一个按钮被应答）。问题是我无法根据答案选择相应的单选按钮。我尝试了ng value=“answer.answered”，在init上设置模型。下面是缩写代码

 <md-card data-ng-repeat="question in gradeCtrl.questions | limitTo: 1  track by $index" class="questions main-questions" 
data-ng-if="!gradeCtrl.subQuestions && gradeCtrl.needsRepairs === false">
<ul data-ng-repeat="answer in question.answers track by $index" class="questionnaire" layout-wrap layout="column" layout-align="center center">
<li>
<input type="radio" name="{{question.id}}" data-ng-attr-id="answer.id" data-ng-value="gradeCtrl.isAnswered(answer);"
 data-ng-init="gradeCtrl.radioButton[answer.id]=gradeCtrl.isAnswered(answer);"
 data-ng-model="gradeCtrl.radioButton[answer.id]">
</li>
</md-card>

我可以通过设置model=answer.answered以及使用ng checked来解决这个问题

<input type="radio" name="{{question.id}}"  data-ng-checked="gradeCtrl.isAnswered(answer);"
                       data-ng-attr-id="answer.id"
                       data-ng-init="gradeCtrl.radioButton[answer.id] = gradeCtrl.isAnswered(answer);"
                       data-ng-click="gradeCtrl.saveAnswer(answer, question.question)"
                       data-ng-model="answer.answered">

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仅供参考您的

数据ng repeat

应该在

li

元素上，而不是

ul