Merge branch 'dev' into debug

src/index.js

@@ -5,6 +5,7 @@ function isExist(field) {
 }
 
 Component({
+  externalClasses: ['picker-class'],
   /**
    * 组件的属性列表
    */

src/index.wxml

@@ -1,4 +1,5 @@
 <picker 
+  class="picker picker-class"
   mode="multiSelector"
   bindchange="pickerChange"
   bindcolumnchange="pickerColumnChange"

src/index.wxss

@@ -1 +1,5 @@
 
+.picker {
+  width: 100%;
+  height: 100%;
+}