[bugfix] Radio: fix label-position not work

fix #1738

packages/radio/index.ts

@@ -21,7 +21,10 @@ VantComponent({
     disabled: Boolean,
     useIconSlot: Boolean,
     checkedColor: String,
-    labelPosition: String,
+    labelPosition: {
+      type: String,
+      value: 'right'
+    },
     labelDisabled: Boolean,
     shape: {
       type: String,

packages/radio/index.wxml

@@ -1,6 +1,13 @@
 <wxs src="../wxs/utils.wxs" module="utils" />
 
 <view class="van-radio custom-class">
+  <view
+    wx:if="{{ labelPosition === 'left' }}"
+    class="label-class {{ utils.bem('radio__label', [labelPosition, { disabled }]) }}"
+    bindtap="onClickLabel"
+  >
+    <slot />
+  </view>
   <view class="van-radio__icon-wrap" bindtap="onChange">
     <slot wx:if="{{ useIconSlot }}" name="icon" />
     <van-icon
@@ -12,7 +19,11 @@
       custom-style="line-height: 20px;"
     />
   </view>
-  <view class="label-class {{ utils.bem('radio__label', [labelPosition, { disabled }]) }}" bindtap="onClickLabel">
+  <view
+    wx:if="{{ labelPosition === 'right' }}"
+    class="label-class {{ utils.bem('radio__label', [labelPosition, { disabled }]) }}"
+    bindtap="onClickLabel"
+  >
     <slot />
   </view>
 </view>