blue ui other

@@ -152,27 +152,27 @@ Page({
    */
   onShow: function () {
     this.selectComponent('#getpos').getPos();
-
-    this._observer = wx.createIntersectionObserver(this)
-    this._observer
-      .relativeTo('.scroll-view')
-      .observe('.swiper-view', (res) => {
-        console.log('sv.observe',res)
-        if(res.intersectionRatio > 0){
-          wx.setNavigationBarColor({
-            frontColor:'#ffffff',
-            backgroundColor:'#ffffff',
-          })
-        }else{
-          wx.setNavigationBarColor({
-            frontColor:'#000000',
-            backgroundColor:'#ffffff',
+    if(wx.createIntersectionObserver){
+      this._observer = wx.createIntersectionObserver(this)
+      this._observer
+        .relativeTo('.scroll-view')
+        .observe('.swiper-view', (res) => {
+          if(res.intersectionRatio > 0){
+            wx.setNavigationBarColor({
+              frontColor:'#ffffff',
+              backgroundColor:'#ffffff',
+            })
+          }else{
+            wx.setNavigationBarColor({
+              frontColor:'#000000',
+              backgroundColor:'#ffffff',
+            })
+          }
+          this.setData({
+            hasNav: res.intersectionRatio == 0
           })
-        }
-        this.setData({
-          hasNav: res.intersectionRatio == 0
         })
-      })
+    }
   },
 
   /**