Yii使用iframe实现异步上传/下载文件
作者：zccst
yii常规post方式提交表单方式请参考：
除了常规post提交方式外，还有异步提交方式。
原理是使用iframe代替原来的页面跳转，大大提升用户体验。
一、上传文件
1，前端html代码
<form id="upForm" action="<?php echo $this->createUrl('repairUpload'); ?>" method="post" enctype ="multipart/form-data" target="upload_target"> <input type="file" name="repair_attached_file" id="repair_attached_file" /><input type="subm it" name="submitBtn" value="立即上传" /> <iframe id="upload_target" name="upload_target" src="#" style="width:0;height:0;border:0px solid #fff;"></iframe></form><span id="upload_repairinfo_success" style="color:blue;"></span><script type="text/javascript">function startUpload() {var spanObj = document.getElementById("upload_repairinfo_success");spanObj.innerHTML = " 开始上传";document.getElementById("upForm").sumbit();}function stopUpload(responseText){var spanObj = document.getElementById("upload_repairinfo_success");//spanObj.innerHTML = "上传成功";spanObj.innerHTML = responseText;}</script>public function actionRepairUpload(){ $attach = CUploadedFile::getInstanceByName('repair_attached_file'); $retValue = ""; if($attach->size > 3*1024*1024){ $retValue = "提示：文件大小不能超过3M"; }else{ $f = file_get_contents($attach->tempName); $a = new Attachment(); $a->ref_type = "failParts"; $a->data = $f; $a->file_path = $attach->name; $a->save(); $retValue = $a->id; } echo "<script type='text/javascript'>window.top.window.stopUpload('{$retValue}')</script>";}