python学习

native/utils/tools.js

@@ -0,0 +1,22 @@
+// 显示购物车tabBar的Badge
+function showTabBarBadge(){
+  wx.getStorage({
+    key: 'shopCarInfo',
+    success: function (res) {
+      if (res.data.shopNum > 0) {
+        wx.setTabBarBadge({
+          index: 2,
+          text: `${res.data.shopNum}`
+        });
+      } else {
+        wx.removeTabBarBadge({
+          index: 2
+        });
+      }
+    }
+  });
+}
+
+module.exports = {
+  showTabBarBadge: showTabBarBadge
+}