harmony 鸿蒙ArkUI Subsystem Changelog

2025-06-12
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ArkUI Subsystem Changelog

cl.arkui.1 Change in Check Rules on the <Scroll> Component

Access Level

Public

Reason for Change

The <Scroll> component supports a single child component. To prevent multiple child components from being added, a check rule is added to the compiler to warn of such attempts.

Change Impact

This change is a non-compatible change. The new check rule does not affect the layout or behavior of the <Scroll> component.

API Level

Change Since

OpenHarmony SDK 4.1.3.5

Key API/Component Changes

<Scroll> component

Adaptation Guide

Make sure the <Scroll> component contains only one child component.

cl.arkui.2 Determination of the Cross Axis Size and stretch Alignment Mode in the <Flex> Component

Access Level

Public

Reason for Change

In the <Flex> container, the priority of the child component size is higher than that of the stretch alignment mode along the cross axis. If both are set, only the cross axis size of the child component takes effect.

Change Impact

This change is a compatible change.

API version 9 and earlier versions: If both the child component size and the stretch alignment mode are set for the cross axis, the cross axis size of the child component does not take effect.

API version 10 and later: If both the child component size and the stretch alignment mode are set for the cross axis, the stretch alignment mode does not take effect.

Change Since

OpenHarmony SDK 4.1.3.5

Key API/Component Changes

<Flex> component

Adaptation Guide

To make the stretch alignment mode for the cross axis take effect, remove the cross axis size settings of the child component.