ArkUI Subsystem Changelog

cl.arkui.1 Change in Handling Rules on Negative Values of fontSize for Buttons

Change Impact

Before change, a negative value of fontSize evaluates to 0. That is, the text is not displayed.

After change, a negative value of fontSize evaluates to the default value 16fp.

Note: This change does not affect the effect of fontSize=0.

cl.arkui.2 Change in the Search Text Box for When the Attributes of the <Search> Component Are Dynamically Changed

Change Impact

Before change, when placeholder, but not value, is set for the <Search> component, dynamically changing the component attributes will clear the search text box.

After change, when placeholder, but not value, is set for the <Search> component, dynamically changing the component attributes will not clear the search text box.

Note: After change, the behavior of the <Search> component is what is expected of the component in normal cases.

cl.arkui.3 Change in the Width Specification of the <Menu> Component

Changed the width specification of the <Menu> component as follows: If the width is not set, the component takes up two columns. If the width is set, the component adapts its content to the set width.

The <Menu> component has a default minimum width of 64 vp.

Change Impact

1. By default, the menu takes up two columns. If the content of the <MenuItem> is wider than 2 columns, the menu width is automatically extended.
2. The default minimum width of the menu is 64 vp. You can change the minimum width through the constraintSize attribute.

Key API/Component Changes

Menu

Adaptation Guide

You can set the minimum width to a value less than 64 vp or remove the limit altogether, by setting constraintSize.

Example

@Entry
@Component
struct Index {
  @Builder
  MyMenu(){
    Menu() {
      MenuItem({ startIcon: $r("app.media.icon"), content: "Menu option" })
    }
    .width(30)
    .constraintSize({minWidth: 0}) //Overwrite the default minimum width of 64 vp.
  }

  build() {
    Row() {
      Column() {
        Text('click to show menu')
      }
      .bindMenu(this.MyMenu)
      .width('100%')
    }
    .height('100%')
  }
}

cl.arkui.4 Change in the Velocity Direction Specification of springCurve

Change Impact

In API version 9, when the interpolate method of springCurve is used for calculation, an initial velocity greater than 0 means to move in the reverse direction of the end point, and an initial velocity less than 0 means move in the direction of the end point.

Since API version 10, when the interpolate method of springCurve is used for calculation, an initial velocity greater than 0 means to move in the direction of the end point, and an initial velocity less than 0 means move in the reverse direction of the end point. As a result, when the initial velocity is not 0, the result obtained using the interpolate method of springCurve in API version 10 is different from that in API version 9.

cl.arkui.5 Change in the Actual Curve Time Estimation Threshold Specification of springCurve

Change Impact

In API version 9, the maximum duration estimated by the interpolate method of springCurve for the actual spring curve is 1 second. When the physics-based curve duration exceeds 1 second, the estimated duration is still 1 second. As a result, the animation duration of the spring curve that exceeds 1 second is incorrectly normalized, and the interpolation result changes abruptly when t=1.

Since API version 10, the maximum duration estimated by the interpolate method of springCurve is 1000 seconds, so as to cover most spring curves. This change will result in differences from the calculation results by the interpolate method of springCurve in API versions earlier than 10.

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