HarmonyOS 使用 mediaquery 监听屏幕旋转未触发回调

display.on("change",(data)=>{ 
  let o=display.getDefaultDisplaySync().orientation; 
  switch (o){ 
    case 0:this.status='竖屏';break; 
    case 1:this.status='横屏';break; 
    case 2:this.status='反向竖屏';break; 
    case 3:this.status='反向横屏';break; 
  } 
})

import { Callback } from '@ohos.base'; 
import { display, window } from '@kit.ArkUI'; 
 
@Entry 
@Component 
struct DisplayTest { 
  @State message: string = 'Hello World'; 
 
  aboutToAppear(): void { 
    let callback: Callback<number> = (data: number) => { 
      console.info('Listening enabled. Data: ' + JSON.stringify(data)); 
        }; 
    try { 
      display.on("change", callback); 
    } catch (exception) { 
      console.error('Failed to register callback. Code: ' + JSON.stringify(exception)); 
    } 
  } 
 
  build() { 
    Column() { 
      Text(this.message) 
        .id('HelloWorld') 
        .fontSize(50) 
        .fontWeight(FontWeight.Bold) 
        .alignRules({ 
          center: { anchor: '__container__', align: VerticalAlign.Center }, 
          middle: { anchor: '__container__', align: HorizontalAlign.Center } 
        }) 
      Button('点击横屏') 
        .onClick(() => { 
          window.getLastWindow(getContext(this), (err, win) => { 
            win.setPreferredOrientation(window.Orientation.LANDSCAPE_INVERTED) 
          }) 
        }) 
      Button('点击竖屏') 
        .onClick(() => { 
          window.getLastWindow(getContext(this), (err, win) => { 
            win.setPreferredOrientation(window.Orientation.PORTRAIT) 
          }) 
        }) 
    } 
    .height('100%') 
    .width('100%') 
  } 
}