harmony 鸿蒙image

2022-12-13
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image

The <image> component is used to render and display images.

NOTE

The APIs of this module are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Not supported

Attributes

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

Name	Type	Default Value	Mandatory	Description
src	string	-	No	Image path. - The local path is supported. Supported formats are as follows: PNG, JPG, BMP, SVG, and GIF. - The path to the in-memory image is also supported in the scheme format of memory://. NOTE To display an online image, download it and then access it with its in-memory path. Do not use URLs.
alt	string	-	No	Placeholder image displayed during image loading.

Styles

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

Name	Type	Default Value	Mandatory	Description
object-fit	string	cover	No	Image scale type. For details about available values, see object-fit. This style is not supported for SVG images.
match-text-direction	boolean	false	No	Whether image orientation changes with the text direction. This style is not supported for SVG images.
fit-original-size	boolean	false	No	Whether the <image> component adapts to the image source size when its width and height are not set. If this style is set to true, object-fit will not take effect. This style is not supported for SVG images.

Table 1 object-fit

Type	Description
cover	The image is scaled with its aspect ratio retained for both sides to be greater than or equal to the display boundaries and displayed in the middle.
contain	The image is scaled with the aspect ratio retained for the image to be completely displayed within the display boundaries and displayed in the middle.
fill	The image is scaled to fill the display area, and its aspect ratio is not retained.
none	The image is displayed in the middle with its aspect ratio and size retained.
scale-down	The image is displayed in the middle with its aspect ratio retained, in the size equal to or smaller than the original size.

NOTE

When using an SVG image, note that:

The SVG image will not be drawn if the length or width of the parent component is infinity. Therefore, you are advised to set the length and width for the <image> component.

If the image length and width are not specified in the SVG description, the SVG image fills the <image> component area.

If the image length and width are specified in the SVG description, the following rules are adopted to decide the final display effect:

If the <image> component is too small to afford the SVG image, the SVG image is cropped and only its upper left part is displayed in the component.

If the <image> component is big enough to afford the SVG image, the SVG image is displayed in the upper left corner of the component.

Events

Name	Parameter	Description
click	-	Triggered when the component is clicked.
complete	-	Triggered when the image is successfully loaded.
error	-	Triggered when an exception occurs during image loading.

Example

<!-- xxx.hml -->
<stack class="content">
    <image src="/common/bg3.jpg" class="img"></image>
</stack>

/* xxx.css */
.img{  
  object-fit: contain
}

4 x 4 widget

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