Signed-off-by: yukangzhe <382985154@qq.com>

pages/student/student.wxss

@@ -118,10 +118,17 @@ image{
   position: absolute;
     z-index: 2;
     color: #FFF;
-    top: 20rpx;
-    right: 20rpx;
     font-size: 36rpx;
     padding: 25rpx;
+    bottom: 60rpx;
+    width: 300rpx;
+    left: 50%;
+    margin-left: -175rpx;
+    text-align: center;
+    height: 40rpx;
+    line-height: 40rpx;
+    background: #eee;
+    color: #333;
 }
 .camera-view{
   position: absolute;