Add demo

tools/demo/pages/index/index.js

@@ -1 +1,89 @@
-Page({})
+Page({
+  /**
+   * 页面的初始数据
+   */
+  data: {
+    result: [],
+    steps: 3,
+    name: 'name',
+    subset: 'sonValue',
+    otherFields: ['id', 'city'],
+    originMultiArray: [
+      {
+        id: '01',
+        name: '1',
+        sonValue: [
+          {
+            id: '011',
+            name: '1.1',
+            sonValue: [
+              {
+                id: '0111',
+                name: '1.1.1',
+              },
+              {
+                id: '0112',
+                name: '1.1.2',
+              }
+            ]
+          },
+          {
+            id: '012',
+            name: '1.2',
+            sonValue: [
+              {
+                id: '0121',
+                name: '1.2.1',
+              },
+              {
+                id: '0122',
+                name: '1.2.2',
+              }
+            ]
+          }
+        ]
+      },
+      {
+        id: '02',
+        name: '2',
+        sonValue: [
+          {
+            id: '021',
+            name: '2.1',
+            sonValue: [
+              {
+                id: '0211',
+                name: '2.1.1',
+              },
+              {
+                id: '0212',
+                name: '2.1.2'
+              }
+            ]
+          },
+          {
+            id: '022',
+            name: '2.2',
+            sonValue: [
+              {
+                id: '0221',
+                name: '2.2.1'
+              },
+              {
+                id: '0222',
+                name: '2.2.2'
+              }
+            ]
+          }
+        ]
+      }
+    ]
+  },
+
+  mutiPickerChange(e) {
+    console.log('多级联动结果：', e.detail)
+    this.setData({
+      result: e.detail.selectedArray
+    })
+  }
+})

tools/demo/pages/index/index.wxml

@@ -1 +1,22 @@
-<comp></comp>
+<!-- 多级联动 -->
+<!-- 
+  origin: 源数组，格式必须为数组和对象的集合，参考示例
+  steps: 多级联动的阶数，默认为0
+  name: 多级联动展示数据的字段名称，默认为name
+  subset: 多级联动的子节点的字段名称，默认为subset
+  otherFields: 若需要额外返回其他字段的数据，可以设置otherFields为数组，参考示例
+  autoSelect: 初始化时，自动选择每列第0项
+  bindchange: 回调函数，参考示例
+ -->
+<comp
+  sourceData="{{originMultiArray}}"
+  steps="{{steps}}"
+  shownFieldName="{{name}}"
+  subsetFieldName="{{subset}}"
+  otherNeedFieldsName="{{otherFields}}"
+  autoSelect
+  bindchange="mutiPickerChange">
+    <view class="picker">
+      当前选择：<text wx:for="{{result}}" wx:key="index">{{item[name]}}，</text>
+    </view>
+</comp>

tools/demo/project.config.json

@@ -14,7 +14,7 @@
 	"compileType": "miniprogram",
 	"libVersion": "2.2.3",
 	"appid": "",
-	"projectname": "miniprogram-demo",
+	"projectname": "miniprogram-picker",
 	"isGameTourist": false,
 	"condition": {
 		"search": {