message: [Doc] fix picker demo
diff: @@ -23,9 +23,11 @@ export default {
  columns: ['Delaware', 'Florida', 'Georqia', 'Indiana', 'Maine']
  };
  },
  + methods: {
  onChange(picker, value, index) {
  Toast(`Value: ${value}, Index: ${index}`);
  }
  + }
  };
  ```
  