1# ArkUI子系统Changelog 2 3 4## cl.arkui.1 滚动组件通用接口backToTop属性默认值变更 5 6**访问级别** 7 8公开接口 9 10**变更原因** 11 12[List](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-list.md)、[Grid](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-grid.md)、[Scroll](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scroll.md)和[WaterFlow](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-waterflow.md)组件默认不支持点击状态栏回到顶部，用户体验较差。 13 14**变更影响** 15 16- 变更前：[List](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-list.md)、[Grid](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-grid.md)、[Scroll](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scroll.md)和[WaterFlow](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-waterflow.md)组件[backToTop](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scrollable-common.md#backtotop15)属性默认值为false，默认不支持点击状态栏回到顶部。 17 18- 变更后：API 18及以后版本，[List](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-list.md)、[Grid](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-grid.md)、[Scroll](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scroll.md)和[WaterFlow](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-waterflow.md)组件滚动方向为垂直方向时，[backToTop](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scrollable-common.md#backtotop15)属性默认值为true，默认支持点击状态栏回到顶部。 19 20**起始API Level** 21 22API 15 23 24**变更发生版本** 25 26从OpenHarmony SDK 5.1.0.57开始。 27 28**变更的接口/组件** 29 30涉及接口：[backToTop](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scrollable-common.md#backtotop15)属性。 31 32涉及组件：[List](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-list.md)、[Grid](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-grid.md)、[Scroll](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scroll.md)和[WaterFlow](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-waterflow.md)组件。 33 34**适配指导** 35 36默认行为变更，原则上无需适配，若应用期望点击状态栏不回到顶部，则需要设置[backToTop](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-scrollable-common.md#backtotop15)属性为false。