harmony 鸿蒙Image

2022-08-09
浏览 (873)

Image

NOTE

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

The Image object is an image on the canvas.

Attributes

Name	Type	Default Value	Mandatory	Description
src	string	-	Yes	Image resource path.
width	<length>	0px	No	Image width.
height	<length>	0px	No	Image height.
onload	Function	-	No	Function called when an image is successfully loaded. This function has no parameter.
onerror	Function	-	No	Function called when an image fails to be loaded. This function has no parameter.

Example

<!-- xxx.hml -->
<div>
  <canvas ref="canvas" style="width: 500px; height: 500px; "></canvas>
</div>

// xxx.js
export default {
    onShow() {
        const el = this.$refs.canvas;
        var ctx = el.getContext('2d');
        var img = new Image();
        // It is recommended that the image be stored in the common directory.
        img.src = 'common/images/example.jpg';
        img.onload = function () {
            console.log('Image load success');
            ctx.drawImage(img, 0, 0, 360, 250);
        };
        img.onerror = function () {
            console.log('Image load fail');
        };
    }
}

1-9