harmony 鸿蒙qrcode

2022-08-09
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qrcode

NOTE

This component is supported since API version 5. Updates will be marked with a superscript to indicate their earliest API version.

The <qrcode> component is used to generate and display a QR code.

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
value	string	-	Yes	Content used to generate the QR code.
type	string	rect	No	QR code type. Available values are as follows: - rect: rectangular QR code. - circle: round QR code.

Styles

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

Name	Type	Default Value	Mandatory	Description
color	<color>	#000000	No	Color of the QR code.
background-color	<color>	#ffffff	No	Background color of the QR code.

NOTE - If the values of width and height are different, the smaller value is used as the length of the QR code. The generated QR code is centered.

If either width or height is set, the value is used as the length of the QR code. If neither of them is set, the default length 200 px is used.

Events

The universal events are supported.

Methods

The universal methods are supported.

Example

<!-- xxx.hml -->
<div class="container">
  <qrcode value="{{qr_value}}" type="{{qr_type}}"
  style="color: {{qr_col}};background-color: {{qr_bcol}};width: {{qr_size}};height: {{qr_size}};margin-bottom: 70px;"></qrcode>
  <text class="txt">Type</text>
  <switch showtext="true" checked="true" texton="rect" textoff="circle" onchange="settype"></switch>
  <text class="txt">Color</text>
  <select onchange="setcol">
    <option for="{{col_list}}" value="{{$item}}">{{$item}}</option>
  </select>
  <text class="txt">Background Color</text>
  <select onchange="setbcol">
    <option for="{{bcol_list}}" value="{{$item}}">{{$item}}</option>
  </select>
</div>

/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.txt {
  margin: 30px;
  color: orangered;
}
select{
  margin-top: 40px;
  margin-bottom: 40px;
}

/* index.js */
export default {
  data: {
    qr_type: 'rect',
    qr_size: '300px',
    qr_col: '#87ceeb',
    col_list: ['#87ceeb','#fa8072','#da70d6','#80ff00ff','#00ff00ff'],
    qr_bcol: '#f0ffff',
    bcol_list: ['#f0ffff','#ffffe0','#d8bfd8']
  },
  settype(e) {
    if (e.checked) {
      this.qr_type = 'rect'
    } else {
      this.qr_type = 'circle'
    }
  },
  setcol(e) {
    this.qr_col = e.newValue
  },
  setbcol(e) {
    this.qr_bcol = e.newValue
  }
}