promptAction.openCustomDialog创建的自定义弹窗蒙层颜色不支持设置0x00000000为纯透明 HarmonyOS 鸿蒙Next

参考下面demo，可以设置背景板为透明色：

import { BusinessError } from '@kit.BasicServicesKit';
import { ComponentContent } from '@kit.ArkUI';

class Params {
  text: string = "";
  constructor(text: string) {
    this.text = text;
  }
}

@Builder
function buildText(params: Params) {
  Column() {
    Text(params.text)
      .fontSize(50)
      .fontWeight(FontWeight.Bold)
      .margin({bottom: 36})
  }/*.backgroundColor('#FFF0F0F0')*/
}

@Entry
@Component
struct Index {
  @State message: string = "hello"

  build() {
    Row() {
      Column() {
        Button("click me")
          .onClick(() => {
            let uiContext = this.getUIContext();
            let promptAction = uiContext.getPromptAction();
            let contentNode = new ComponentContent(uiContext, wrapBuilder(buildText), new Params(this.message));
            try {
              promptAction.openCustomDialog(contentNode);
            } catch (error) {
              let message = (error as BusinessError).message;
              let code = (error as BusinessError).code;
              console.error(`OpenCustomDialog args error code is ${code}, message is ${message}`);
            };
          })
      }
      .width('100%')
      .height('100%')
    }
    .height('100%')
  }
}

详情可以参考以下文档： https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-arkui-uicontext-V5#opencustomdialog12