加了清除历史记录和清除收藏的函数，方便后面写个性化的同学可以直接调用，总感觉有种安排后事的。。。。XD

miniprogram/pages/index/index.wxml

@@ -242,10 +242,10 @@
     <!-- 收藏的时候设置备注的输入框 -->
     <view id="star_setRemark">
         <view class="title">
-            <view>{{"输入备注，至多八字"}}</view>
+            <view>{{"输入备注，至多七字"}}</view>
         </view>
         <view class="input">
-            <input id="input_setRemark" bindinput='getInputRemark' placeholder="___________________" maxlength="8"/>
+            <input id="input_setRemark" bindinput='getInputRemark' placeholder="___________________" maxlength="7"/>
         </view>
         <view class="verify" bind:tap="add_collection">确认</view>
         <view class="cancel" bind:tap="exit_setRemark">取消</view>
@@ -253,10 +253,10 @@
 
     <view id="editRemark">
         <view class="title">
-            <view>{{"修改备注，至多八字"}}</view>
+            <view>{{"修改备注，至多七字"}}</view>
         </view>
         <view class="input">
-            <input bindinput='getInputRemark' placeholder="___________________" maxlength="8"/>
+            <input bindinput='getInputRemark' placeholder="___________________" maxlength="7"/>
         </view>
         <view class="verify" bind:tap="editRemark">确认</view>
         <view class="cancel" bind:tap="exit_editRemark">取消</view>