feat(input): add auto focus

pages/component/input/input.uvue

@@ -2,12 +2,12 @@
     <view class="nvue-page-root">
         <page-head :title="title"></page-head>
         <view class="uni-common-mt">
-            <!-- <view class="uni-form-item uni-column">
+            <view class="uni-form-item uni-column">
                 <view class="title"><text class="uni-form-item__title">可自动聚焦的 input</text></view>
                 <view class="uni-input-wrapper">
                     <input class="uni-input" :focus="true" placeholder="自动获得焦点" ref="input"/>
                 </view>
-            </view> -->
+            </view>
             <!-- #ifdef APP-PLUS -->
             <!-- <view v-if="platform==='ios'&&!isNvue" class="uni-form-item uni-column">
                 <view class="title"><text class="uni-form-item__title">隐藏 iOS 软键盘上的导航条</text></view>
@@ -115,6 +115,9 @@
                 showPassword: true
             }
         },
+        onReady() {
+          (this.$refs['input'] as INode).focus();
+        },
         methods: {
             onKeyInput: function (event : InputEvent) {
                 this.inputValue = event.detail.value