KnockOut数组绑定到单个索引

Question

所以我有我的可观察数组

answer: ko.observableArray("")

我尝试使用data-bind来访问answer（）[0]

<div id="iAnswer" style="display: inline-block; text-align: right; width: 80%; border: 0px;"
                     data-bind="dxTextBox: { value: answer()[$data.index], text:$data.answer}"></div>

$ data.index在通过时等于0。

Answer 1

此代码是否解决了您的任务？

<!-- ko if: answer().length === 0 -->
    <div> There are no answers. </div>
<-- /ko -->
<!-- ko ifnot: answer().length === 0 -->
<div id="iAnswer" style="display: inline-block; text-align: right; width: 80%; border: 0px;"
          data-bind="dxTextBox: { text:$data.answer }"></div>                
<-- /ko -->