HarmonyOS 鸿蒙Next 官方自定义组件代码有关@Entry用法代码警告，修改完报错。

HarmonyOS 鸿蒙Next 官方自定义组件代码有关@Entry用法代码警告，修改完报错。
<markdown _ngcontent-rjb-c149="" class="markdownPreContainer">

代码:

[@Entry](/user/Entry)
[@Component](/user/Component)
export struct ViewA {
  [@State](/user/State) count: number = 1;

  build() {
    Column() {
      Text(`count=${this.count}`)

      if (this.count > 0) {
        Text(`count is positive`)
          .fontColor(Color.Green)
      }

      Button('increase count')
        .onClick(() => {
          this.count++;
        })

      Button('decrease count')
        .onClick(() => {
          this.count--;
        })
    }
  }
}

不修改直接警告： It's not a recommended way to export struct with [@Entry](/user/Entry) decorator, which may cause ACE Engine error in component preview mode.

修改完直接报错：

[@Component](/user/Component)
export struct ViewA {
  [@State](/user/State) count: number = 1;
build() {
Column() {
Text(count=${<span class="hljs-keyword">this</span>.count})
  <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.count &gt; <span class="hljs-number">0</span>) {
    Text(`count is positive`)
      .fontColor(Color.Green)
  }

  Button(<span class="hljs-string">'increase count'</span>)
    .onClick(() =&gt; {
      <span class="hljs-keyword">this</span>.count++;
    })

  Button(<span class="hljs-string">'decrease count'</span>)
    .onClick(() =&gt; {
      <span class="hljs-keyword">this</span>.count--;
    })
}
}
}
@Entry
export function App() {
return new ViewA();
}

修改完报错: A page configured in 'main_pages.json or build-profile.json5' must have one and only one '[@Entry](/user/Entry)' decorator.

'[@Entry](/user/Entry)' can decorate only custom components.