HarmonyOS 复制黏贴功能无效

import pasteboard from '@ohos.pasteboard'  
import promptAction from '@ohos.promptAction'  
  
@Entry  
@Component  
export struct CopyText {  
  private textContent: string = "复制我"  
  
  build() {  
    Column() {  
      Text(this.textContent)  
        .fontSize($r("sys.float.ohos_id_text_size_body3"))  
        .borderRadius(9)  
        .borderWidth(1)  
        .padding({ left: 8, right:8})  
        .fontColor($r('sys.color.ohos_id_color_text_primary'))  
        .fontWeight(FontWeight.Medium)  
        .opacity($r("sys.float.ohos_id_alpha_content_secondary"))  
        .onClick(() => copyText(this.textContent))  
    }  
  }  
}  
  
function copyText(text: string) {  
  const pasteboardData = pasteboard.createData(pasteboard.MIMETYPE_TEXT_PLAIN, text)  
  const systemPasteboard = pasteboard.getSystemPasteboard()  
  systemPasteboard.setData(pasteboardData) // 将数据放入剪切板  
  systemPasteboard.getData().then((data) => {  
    if (data) {  
      promptAction.showToast({ message: "复制成功" })  
    } else {  
      promptAction.showToast({ message: "复制失败" })  
    }  
  })  
}