harmony 鸿蒙switch

2022-08-09
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switch

NOTE

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

The <switch> component is used to enable or disable a function.

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
checked	boolean	false	No	Whether the component is checked or not.
showtext	boolean	false	No	Whether the component displays text.
texton	string	“On”	No	Text displayed when the component is checked.
textoff	string	“Off”	No	Text displayed when the component is not checked.

Styles

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

Name	Type	Default Value	Mandatory	Description
texton-color	<color>	#000000	No	Text color displayed when the component is checked. This attribute is available only when texton and textoff are set.
textoff-color	<color>	#000000	No	Text color displayed when the component is not checked. This attribute is available only when texton and textoff are set.
text-padding	number	0px	No	Distance between the two sides of the longest text in texton and textoff and the border of the slider.
font-size	<length>	-	No	Font size. This attribute is available only when texton and textoff are set.
allow-scale	boolean	true	No	Whether the font size changes with the system’s font size settings. If the config-changes tag of fontSize is configured for abilities in the config.json file, the setting takes effect without application restart.
font-style	string	normal	No	Font style. This attribute is available only when texton and textoff are set. For details, see font-style of the <text> component.
font-weight	number \|string	normal	No	Font weight. This attribute is available only when texton and textoff are set. For details, see font-weight of the <text> component.
font-family	string	sans-serif	No	Font family, in which fonts are separated by commas (,). Each font is set using a font name or font family name. The first font in the family or the specified custom font is used for the text. This attribute is available only when texton and textoff are set.

Events

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

Name	Parameter	Description
change	{ checked: checkedValue }	Triggered when the checked state changes.

Methods

The universal methods are supported.

Example

<!-- xxx.hml -->
<div class="container">
    <switch @change="normalswitchChange">
    </switch>
    <switch class="switch" showtext="true" texton="On" textoff="Off" @change="switchChange">
    </switch>
    <switch class="switch text" showtext="true" texton="Switch on" textoff="Switch off" checked="true" @change="switchChange">
    </switch>
</div>

/* xxx.css */
.container {
    display: flex;
    justify-content: center;
    align-items: center;
}
.switch {
    texton-color: red;
    textoff-color: forestgreen;
}
.text {
    text-padding: 20px;
    font-size: 30px;
    font-weight: 700;
}

// xxx.js
import promptAction from '@ohos.promptAction';
export default {
    data: {
        title: 'World'
    },
    switchChange(e) {
        if (e.checked) {
            promptAction.showToast({
                message: "Switch on."
            });
        } else {
            promptAction.showToast({
                message: "Switch off."
            });
        }
    },
    normalswitchChange(e) {
        if (e.checked) {
            promptAction.showToast({
                message: "switch on"
            });
        } else {
            promptAction.showToast({
                message: "switch off"
            });
        }
    }
}

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