fix bug

apps/home/Tpl/default/Home/exams_w3g.html

@@ -103,7 +103,7 @@
 							<!--
 							<div @click="onPay(item)" v-else-if="item.price > 0" class="button_orange layout_center">¥{{item.price}}</div>
 							-->
-							<div @click="onDownload(index)" v-else-if="item.price > 0" class="button_orange layout_center">
+							<div @click="showYulan(index)" v-else-if="item.price > 0" class="button_orange layout_center">
 								下载预览
 								<!-- 下载预览提示 -->
 								<div v-show="yulan==index">
@@ -111,8 +111,8 @@
 										<div class="tips_title">提示</div>
 										<div class="tips_body">套餐下架后用户便无法找到该商品进行购买，你确定要下架吗？</div>
 										<div class="tips_foot">
-											<div class="tips_foot_L">下载预览</div>
-											<div class="tips_foot_R">下载全部</div>
+											<div @click="onDownload(index)" class="tips_foot_L" >下载预览</div>
+											<div @click="onPay(item)"  class="tips_foot_R">下载全部</div>
 										</div>
 									</div>
 								</div>
@@ -336,19 +336,25 @@
 				// if (item.attach) {
 				// 	window.location.href = item.attach;
 				// }
-				// var link = document.createElement('a');
-				// // 设置下载的文件名
-				// link.download = this.download[index].title;
-				// link.style.display = 'none';
-				// //设置下载路径
-				// link.href = this.download[index].attach;
-				// //触发点击
-				// document.body.appendChild(link);
-				// link.click();
-				// //移除节点
-				// document.body.removeChild(link);
-
-				this.yulan = index;
+				var link = document.createElement('a');
+				// 设置下载的文件名
+				link.download = this.download[index].title;
+				link.style.display = 'none';
+				//设置下载路径
+				link.href = this.download[index].attach;
+				//触发点击
+				document.body.appendChild(link);
+				link.click();
+				//移除节点
+				document.body.removeChild(link);
+				this.yulan = 0;
+			},
+			showYulan: function (index) {
+				if(!this.download[index].attach){
+					alert('当前课程无文件下载');
+				} else {
+					this.yulan = index;
+				}
 			},
 
 			onTopTab: function(tab) {