HarmonyOS鸿蒙Next中在点击保存的时候把bindsheet弹窗关闭，但一直没搞成功

开发者你好，可以通过AppStorage保存contentNode。

【背景知识】 AppStorage：提供状态变量在应用级全局共享的能力，可以实现应用中不同页面数据共享，在V2版本下可以使用AppStorageV2。 【解决方案】 使用AppStorage可以实现数据在应用中共享，在构建半模态页面的组件内容时保存其数据，再通过唯一的键字符串值访问获取此数据即可。 示例代码如下：

在EntryAbility.ets中获取windowStage：

onWindowStageCreate(windowStage: window.WindowStage): void {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
    windowStage.loadContent('pages/MapChartDemo', (err) => {
      AppStorage.setOrCreate('uiContext', windowStage.getMainWindowSync().getUIContext());
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      AppStorage.setOrCreate('windowStage', windowStage)
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content.');
    });
 }

@Entry
@Component
struct Index {
  windowStage = AppStorage.get('windowStage') as window.WindowStage;
  @State message: string = 'BindSheet';
  contentNode: ComponentContent<Params> | null = null;

  dialogController: CustomDialogController = new CustomDialogController({
    alignment: DialogAlignment.Top,
    builder: Dialog(),
    cancel: () => {
      this.dialogController.close()
    },
    backgroundColor: Color.Blue,
    offset: { dx: 0, dy: 0 }
  })

  aboutToAppear(): void {
    this.contentNode = new ComponentContent(this.getUIContext(), wrapBuilder(buildText),
      new Params(this.message, this.dialogController));
    AppStorage.setOrCreate('contentNode', this.contentNode)
  }

  build() {
    Column() {
      Button('打开Bindsheet')
        .onClick(() => {
          let uiContext = this.windowStage.getMainWindowSync().getUIContext();
          let uniqueId = this.getUniqueId();
          let frameNode: FrameNode | null = uiContext.getFrameNodeByUniqueId(uniqueId);
          let targetId = frameNode?.getFirstChild()?.getUniqueId();
          uiContext.openBindSheet(this.contentNode, {
            height: SheetSize.MEDIUM,
            title: { title: 'Title', subtitle: 'subtitle' },
          }, targetId)
            .then(() => {
              console.info('openBindSheet success');
            })
            .catch((err: BusinessError) => {
              console.error(`openBindSheet error. Cause:${err.code}, message:${err.message}`);
            })
        })
    }
  }
}

弹窗页面：

import { window } from '@kit.ArkUI'

// 弹窗相关
@CustomDialog
@Component
export struct Dialog {
  @State showFlag: Visibility = Visibility.Visible
  controller: CustomDialogController

  build() {
    Column() {
      Button('关闭Bindsheet')
        .onClick(() => {
          let node: ComponentContent<Params> = AppStorage.get('contentNode') as ComponentContent<Params>;
          let windowStage = AppStorage.get('windowStage') as window.WindowStage
          windowStage.getMainWindowSync().getUIContext().closeBindSheet(node)
        })
        .margin({ top: 53 })
    }
    .width('100%')
    .padding({ bottom: 15 })
    .linearGradient(
      {
        direction: GradientDirection.Bottom,
        colors: [['#283790', 0.0], ['#B2B1AB', 1.0]]
      }
    )
    .borderRadius({ bottomLeft: 20, bottomRight: 20 })
  }
}

export class Params {
  text: string = '';
  dialogController: CustomDialogController | null = null

  constructor(text: string, dialogController: CustomDialogController | null) {
    this.text = text;
    this.dialogController = dialogController
  }
}

@Builder
export function buildText(params: Params) {
  Column() {
    Text(params.text)
    Button('打开弹窗')
      .onClick(() => {
        params.dialogController?.open()
      })
  }
}