harmony 鸿蒙rating

2022-08-09
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rating

NOTE

This component is supported since API version 4. Updates will be marked with a superscript to indicate their earliest API version.

The <rating> component provides a rating bar used for reviews and ratings.

Required Permissions

None

Child Components

Not supported

Attributes

In addition to the universal attributes, the following attributes are supported.

Name	Type	Default Value	Mandatory	Description
numstars	number	5	No	Maximum number of rating stars.
rating	number	0	No	Number of stars rated.
stepsize	number	0.5	No	Step to increase the rating value.
indicator	boolean	false	No	Whether to make the rating icons as an indicator (not-editable by users).

Styles

In addition to the universal styles, the following styles are supported.

Name	Type	Default Value	Mandatory	Description
star-background	string	-	No	Background image when a rating star is unselected. Only PNG and JPG images in a local path are supported.
star-foreground	string	-	No	Foreground image when a rating star is selected. Only PNG and JPG images in a local path are supported.
star-secondary	string	-	No	Secondary background image when a rating star is partially selected. This image will cover the background image and can only be a PNG or JPG image from a local path.
width	<length>\|<percentage>	120px 60 px (cannot be edited)	No	Image width. The default value is the width of the default image for five-star ratings. If you do not set the maximum rating value and background images of the rating stars, the default value will be used.
height	<length>\|<percentage>	24px 12px (cannot be edited)	No	Image height. The default value is the height of the default image for five-star ratings. If you do not set the maximum rating value and background images of the rating stars, the default value will be used.
rtl-flip	boolean	true	No	Whether the image source is automatically flipped in the RTL text direction.

NOTE

You must set star-background, star-secondary, and star-foreground. Otherwise, the rating star is gray, indicating that the image is set incorrectly.

Events

In addition to the universal events, the following events are supported.

Name	Parameter	Description
change	{ rating: number }	Triggered when the rating value changes.

Methods

The universal methods are supported.

Example

<!-- xxx.hml -->
<div class="container">
  <rating numstars="5" rating="5" @change="changeRating" id="rating">
  </rating>
</div>

/* xxx.css */
.container {
  display: flex;
  justify-content: center;
  align-items: center;
}
rating {
  width: 200px;
}

// xxx.js
import promptAction from '@ohos.promptAction';
export default {
    changeRating(e){
        promptAction.showToast({
            message: e.rating
        });
    }
}

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