如何创建子窗口并与主窗口通信（window模块以及AppStorage的使用） 原创 精华

// EntryAbility.ts
import AbilityConstant from '@ohos.app.ability.AbilityConstant';
import hilog from '@ohos.hilog';
import UIAbility from '@ohos.app.ability.UIAbility';
import Want from '@ohos.app.ability.Want';
import window from '@ohos.window';

let sub_windowClass = null;
export default class EntryAbility extends UIAbility {

  destroySubWindow() {
    // 销毁子窗口。当不再需要子窗口时，可根据具体实现逻辑，使用destroy对其进行销毁。
    sub_windowClass.destroyWindow((err) => {
      if (err.code) {
        console.error('Failed to destroy the window. Cause: ' + JSON.stringify(err));
        return;
      }
      console.info('Succeeded in destroying the window.');
    });
  }

  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
  }

  onDestroy() {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');
  }

  onWindowStageCreate(windowStage: window.WindowStage) {
    // 将自定义数据变量“data”存入AppStorage
    AppStorage.SetOrCreate('data', 1);
    AppStorage.SetOrCreate('window', windowStage);
    // 为主窗口添加加载页面
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

    windowStage.loadContent('pages/Index', (err, data) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }

  onWindowStageDestroy() {
    this.destroySubWindow();
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
  }

  onForeground() {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
  }

  onBackground() {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
  }
}
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// Index.ets
import window from '@ohos.window';

@Entry
@Component
struct Index {
  // 使用@StorageLink将"mainData"与AppStorage中的变量"data"进行双向绑定
  @StorageLink('data') mainData: number = 1;
  @StorageLink('window') storWindow:window.WindowStage = null
  private windowStage = this.storWindow
  private sub_windowClass = null

  showSubWindow() {
    // 创建应用子窗口。
    this.windowStage.createSubWindow("hiSubWindow", (err, data) => {
      if (err.code) {
        console.error('Failed to create the subwindow. Cause: ' + JSON.stringify(err));
        return;
      }
      this.sub_windowClass = data;
      console.info('Succeeded in creating the subwindow. Data: ' + JSON.stringify(data));
      // 子窗口创建成功后，设置子窗口的位置、大小及相关属性等。
      this.sub_windowClass.moveWindowTo(300, 300, (err) => {
        if (err.code) {
          console.error('Failed to move the window. Cause:' + JSON.stringify(err));
          return;
        }
        console.info('Succeeded in moving the window.');
      });
      this.sub_windowClass.resize(350, 350, (err) => {
        if (err.code) {
          console.error('Failed to change the window size. Cause:' + JSON.stringify(err));
          return;
        }
        console.info('Succeeded in changing the window size.');
      });
      // 为子窗口加载对应的目标页面。
      this.sub_windowClass.setUIContent("pages/SubWindow",(err) => {
        if (err.code) {
          console.error('Failed to load the content. Cause:' + JSON.stringify(err));
          return;
        }
        console.info('Succeeded in loading the content.');
        // 显示子窗口。
        this.sub_windowClass.showWindow((err) => {
          if (err.code) {
            console.error('Failed to show the window. Cause: ' + JSON.stringify(err));
            return;
          }
          console.info('Succeeded in showing the window.');
        });
        this.sub_windowClass.setWindowBackgroundColor('#E8A027')
      });
    })
  }

  build() {
    Row() {
      Column() {
        Text(`AppStorage保存的数据：${this.mainData}`)
          .margin({bottom:30})
        Button('子窗口数据+1')
          .backgroundColor('#A4AE77')
          .margin({bottom:30})
          .onClick(()=>{
            // 点击，storData的值加1
            this.mainData += 1
          })
        Button('创建子窗口')
          .backgroundColor('#A4AE77')
          .onClick(()=>{
            // 点击弹出子窗口
            this.showSubWindow()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}
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// SubWindow.ets
import window from '@ohos.window';

interface Position {
  x: number,
  y: number
}

@Entry
@Component
struct SubWindow{
  // 使用@StorageLink将"subData"与AppStorage中的变量"data"进行双向绑定
  @StorageLink('data') subData: number = 1;
  // 创建位置变量，并使用@Watch监听，变量发生变化调用moveWindow方法移动窗口
  @State @Watch("moveWindow") windowPosition: Position = { x: 0, y: 0 };
  private panOption: PanGestureOptions = new PanGestureOptions({ direction: PanDirection.All });
  private subWindow: window.Window
  // 通过悬浮窗名称“hiSubWindow”获取到创建的悬浮窗
  aboutToAppear() {
    this.subWindow = window.findWindow("hiSubWindow")
  }
  // 将悬浮窗移动到指定位置
  moveWindow() {
    this.subWindow.moveWindowTo(this.windowPosition.x, this.windowPosition.y);
  }

  build(){
    Column(){
      Text(`AppStorage保存的数据：${this.subData}`)
        .fontSize(12)
        .margin({bottom:10})
      Button('主窗口数据+1')
        .fontSize(12)
        .backgroundColor('#A4AE77')
        .onClick(()=>{
          // 点击，subData的值加1
          this.subData += 1
        })
    }
    .height('100%')
    .width('100%')
    .alignItems(HorizontalAlign.Center)
    .justifyContent(FlexAlign.Center)
    .gesture(
      PanGesture(this.panOption)
        .onActionStart((event: GestureEvent) => {
          console.info('Pan start');
        })
        // 发生拖拽时，获取到触摸点的位置，并将位置信息传递给windowPosition
        .onActionUpdate((event: GestureEvent) => {
          this.windowPosition.x += event.offsetX;
          this.windowPosition.y += event.offsetY;
        })
        .onActionEnd(() => {
          console.info('Pan end');
        })
    )
  }
}
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