HarmonyOS 如何准确获取ArkUI组件尺寸变化情况？

@Entry 
@Component 
struct page { 
 @State sizeValue:string = " " 
 build() { 
  Column() { 
   Row() 
   { 
    Text("Hello World") 
   } 
   .onSizeChange((oldValue: SizeOptions, newValue: SizeOptions) => { 
    console.info(`Ace: on size change, oldValue is ${JSON.stringify(oldValue)} value is ${JSON.stringify(newValue)}`) 
    this.sizeValue = JSON.stringify(newValue) 
   }) 
  } 
 } 
}