不加.layoutWeight(1)显示不全，加了.layoutWeight(1)如果列表项比较少，会被强制居中，怎么解决呢？

@Entry  
@Component  
struct FlexLimitScollerHeightPage {  
  
  @State message: string = 'Hello World'  
  @State arr:number[] = []  
  @State arr1:number[] = []  
  @State state:boolean = false  
  aboutToAppear(): void {  
  
    for (let i = 0; i < 10; i++) {  
      this.arr1.push(i)  
    }  
  }  
  private scrollerForScroll: Scroller = new Scroller()  
  build() {  
    Flex({direction: FlexDirection.Column, justifyContent:FlexAlign.Start}) {  
      // Column() {  
      Text('切换 -- 标题')  
        .height(40)  
        .margin({top:50})  
        .width('100%').onClick(()=>{  
        this.state = !this.state  
      })  
      Scroll(this.scrollerForScroll) {  
        Flex({direction: FlexDirection.Column, justifyContent:FlexAlign.Start}) {  
          // Column() {  
          if(this.state){  
            ForEach(this.arr, (item: number) => {  
              Text(item.toString()).height(40)  
              Divider().color(Color.Red)  
            }, (items: number) => items.toString())  
            ForEach(this.arr1, (item: number) => {  
              Text(item.toString()).height(40)  
              Divider().color(Color.Green)  
            }, (items: number) => items.toString())  
            ForEach(this.arr1, (item: number) => {  
              Text(item.toString()).height(40)  
              Divider().color(Color.Green)  
            }, (items: number) => items.toString())  
            ForEach(this.arr1, (item: number) => {  
              Text(item.toString() + 22).height(40)  
              Divider().color(Color.Green)  
            }, (items: number) => items.toString())  
          }else{  
            ForEach(this.arr1, (item: number) => {  
              Text(item.toString() + 22).height(40)  
              Divider().color(Color.Green)  
            }, (items: number) => items.toString())  
          }  
  
        }  
        .width('100%')  
      }  
    }  
    .height('100%')  
  }  
}