refresh + scroll+list嵌套问题

Refresh({ refreshing: $$this.isRefreshing }) {  
  Column(){  
    Demo()  
  }  
}  
.onRefreshing(() => {  
  setTimeout(() => {  
    this.isRefreshing = !this.isRefreshing  
  }, 2000)  
})  
.backgroundColor(0x00ffff).width('100%')  
.layoutWeight(0)

Refresh({ refreshing: $$this.isRefreshing }) {  
  Demo().width('100%')  
}  
.onRefreshing(() => {  
  setTimeout(() => {  
    this.isRefreshing = !this.isRefreshing  
  }, 2000)  
})  
.backgroundColor(0x00ffff).width('100%')  
.layoutWeight(0)