diff --git a/app.js b/app.js
index f489216..818b5d6 100644
--- a/app.js
+++ b/app.js
@@ -113,9 +113,9 @@ App({
         wx.getSystemInfo({
           success: (res) => {
             // console.log(res)
-            let modelmes = res.model; //手机品牌
+            let modelmes = res?res.model:null; //手机品牌
             console.log('手机品牌', modelmes)
-            if (modelmes.indexOf('iPhone X') != -1) {　　//XS,XR,XS MAX均可以适配,因为indexOf()会将包含'iPhone X'的字段都查出来
+            if (modelmes && modelmes.indexOf('iPhone X') != -1) {　　//XS,XR,XS MAX均可以适配,因为indexOf()会将包含'iPhone X'的字段都查出来
               this.globalData.isIpx = true
             }
           },