在wxml中{{fileList[index]}}无法识别有什么好的解决方法吗? <van-uploader upload-text="可上传6张" accept="image" max-count="6" data-index="{{a}}" file-list="{{ fileList[a] }}" deletable="{{ true }}" bind:delete="deleteImage" bind:after-read="afterRead" bind:delete="delete" />