HarmonyOS 鸿蒙Next 滚动控制器的滚动方法触发的 currentOffset 值不一致

HarmonyOS 鸿蒙Next 滚动控制器的滚动方法触发的 currentOffset 值不一致

@Entry @Component struct Index { sc = new Scroller() @State isShow: boolean = false

// 获取随机高度
getRandomNumber() {
    return Math.floor(Math.random() * (300 - 200 + 1)) + 200;
}

// 随机颜色
getRandomColor(): ResourceColor {
    const r = Math.floor(Math.random() * 256);
    const g = Math.floor(Math.random() * 256);
    const b = Math.floor(Math.random() * 256);
    return `rgba(${r}, ${g}, ${b}, 0.5)`;
}

@Builder
CustomFooter() {
    Text('尾')
        .width('100%')
        .textAlign(TextAlign.Center)
        .fontSize('30')
}

build() {
    Stack({
        alignContent: Alignment.BottomEnd
    }) {
        WaterFlow({
            footer: this.CustomFooter,
            scroller: this.sc
        }) {
            ForEach(Array.from({
                length: 9
            }), (item: void, index: number) => {
                FlowItem() {
                    Text(index + '')
                        .fontSize(30)
                        .fontWeight(600)
                }
                .height(this.getRandomNumber())
                .backgroundColor(this.getRandomColor())
                .width('100%')
            })
        }
        .columnsTemplate('1fr 1fr')
        .onScroll(() => {
            if (this.sc.currentOffset()
                .yOffset > 100) {
                this.isShow = true
            } else {
                this.isShow = false
            }
        })

        Text('back')
            .padding(20)
            .backgroundColor('#f00')
            .fontColor('#fff')
            .margin({
                right: 20,
                bottom: 20
            })
            .translate({
                x: this.isShow ? '0' : '150%'
            })
            .opacity(this.isShow ? 1 : 0)
            .animation({
                duration: 300
            })
            .onClick(() => {
                this.sc.scrollTo({ // 位置滚动
                    xOffset: 0,
                    yOffset: 0
                })
                console.log(this.sc.currentOffset()
                    .yOffset + '')
            })
    }
    .width('100%')
    .height('100%')
}

}

export default Index