HarmonyOS 整个app更换字体，怎么做最方便？

import font from '@ohos.font';  
onWindowStageCreate(windowStage: window.WindowStage): void {  
  windowStage.loadContent('pages/registerFont', (err, data) => {  
  if (err.code) {  
  return;  
}  
font.registerFont({  
  familyName: 'Beacon',  
  familySrc: $rawfile('font/Beacon.otf')  
})  
font.registerFont({  
  familyName: 'SF',  
  familySrc: $rawfile('font/SF-Pro-Text-Italic.ttf')  
})  
});  
}

@Entry  
@Component  
struct registerFont {  
  @State message: string = 'test'  
  
  build() {  
    Column() {  
      Text(this.message)  
        .align(Alignment.Center)  
        .fontSize(50)  
        .fontFamily('Beacon')  
      Text(this.message)  
        .align(Alignment.Center)  
        .fontSize(50)  
        .fontFamily('SF')  
    }.width('100%')  
  }  
}