first add files

ProjectLiaisonForm/pages/picker/area/index.wxml

@@ -0,0 +1,17 @@
+<t-cell title="选择地区" arrow hover note="{{areaText}}" bind:click="onAreaPicker" />
+
+<t-picker
+  visible="{{areaVisible}}"
+  value="{{areaValue}}"
+  title="选择地区"
+  cancelBtn="取消"
+  confirmBtn="确认"
+  usingCustomNavbar
+  bindchange="onPickerChange"
+  bindpick="onColumnChange"
+  bindcancel="onPickerCancel"
+>
+  <t-picker-item options="{{provinces}}"></t-picker-item>
+  <t-picker-item options="{{cities}}"></t-picker-item>
+  <t-picker-item options="{{counties}}"></t-picker-item>
+</t-picker>