harmony 鸿蒙Widget Data Interaction
Widget Data Interaction
The ArkTS widget framework provides the updateForm() and requestForm() APIs to proactively trigger widget updates. You can use LocalStorageProp to check the widget data to be updated.
| API | System Capability | Constraints |
|---|---|---|
| updateForm | No | 1. Invoked by the widget provider. 2. Allows only the widget provider to update its own widgets. |
| requestForm | Yes | 1. Invoked by the widget host. 2. Allows only the widget host to update the widgets added to it. |
The following are the typical use cases of widget updates:
- Configuring a Widget to Update Periodically
- Updating Widget Content Through a Proxy
- Updating Local and Online Images
- Updating Widget Content by State
- Updating Widget Content by Widget Host (for System Applications Only)
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