开始做充值，，调整了首页

components/navigator/index.wxml

@@ -1,9 +1,13 @@
-<view class="navigator" style="height: {{(statusBarHeight + 46)}}px;">
-  <view class="navigatorTitle">
-
-    {{title}}
+<!-- 使用fixed定位 -->
+<view class="navigator">
+  <view class="navigator" style="height: {{statusBarHeight + 46}}px;">
+    <view class="navigatorTitle">
+      {{title}}
+    </view>
+    <view class="backWrapper"  bind:tap="back">
+      <van-icon name="arrow-left" wx:if="{{canBack}}" class="back" />
+    </view>
   </view>
-  <view class="backWrapper">
-    <image src="/assets/images/left.png" bind:tap="back" wx:if="{{canBack}}" class="back" />
-  </view>
-</view>
+</view>
+<!-- 填充fixed定位页面被覆盖的组件 -->
+<view class="wrapper" style="height: {{statusBarHeight + 46}}px"></view>