input点击后无法出现选择文件对话框
<nav class="bar bar-tab"> <div class="row"> <div class="col-50"><a href="#" class="button button-big">mine</a></div> <div class="col-50"> <form id="signupListImportForm" enctype="multipart/form-data"> <input type="file" id="btn-file" style="display:none" name="uploadFile" onchange="uploadFile()"/> <a onlick="" class="button button-big button-fill">upload</a> </form> </div> </div> </nav>