页面滑动过程中动态修改状态栏文字颜色

import measure  from '@ohos.measure'  
import window from '@ohos.window';  
  
@Entry  
@Component  
struct MeasureDemo {  
  @State message: string = 'Hello World';  
  private scrollerForList: Scroller = new Scroller()  
  private arr: number[] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]  
  @State measure: SizeOptions = measure.measureTextSize({  
    textContent: this.message,  
  })  
  
  build() {  
    Row() {  
      Column() {  
        Text(this.message)  
          .fontSize(50)  
          .fontWeight(FontWeight.Bold)  
  
        Text('测试文本宽度:' + this.measure.width)  
        Text('测试文本高度:' + this.measure.height)  
  
        Button("onclick").onClick(() => {  
          window.getLastWindow(getContext(this), (err, win) => {  
            win.setWindowSystemBarProperties({statusBarContentColor : '#ff00ff'})  
          })  
        })  
  
        List({ space: 20, scroller: this.scrollerForList }) {  
          ForEach(this.arr, (item: number) => {  
            ListItem() {  
              Text("ListItem" + item)  
                .width("100%")  
                .height("100%")  
                .borderRadius(15)  
                .fontSize(16)  
                .textAlign(TextAlign.Center)  
                .backgroundColor(Color.White)  
            }.width("100%").height(100)  
          }, (item: string) => item)  
        }  
        .width("100%")  
        .height("50%")  
        .edgeEffect(EdgeEffect.None)  
        .friction(0.6)  
        .onScroll(() => {  
          window.getLastWindow(getContext(this), (err, win) => {  
            win.setWindowSystemBarProperties({statusBarContentColor : '#ff00ff'})  
          })  
  
        })  
      }  
      .width('100%')  
    }  
    .height('100%')  
    .backgroundColor(Color.Pink)  
  }  
}