The focus error codes describe common issues and handling directions when a component fails to obtain focus, helping you locate focus exceptions and take appropriate measures. Only the error codes specific to this module are described below. For details about the universal error codes, see Universal Error Codes.
150001 Component Not Focusable
Error Message
the component cannot be focused.
Description
This error code is reported when the current component is not focusable. This error code is of the string type.
Possible Causes
The component is not focusable by default, or you set the focusable attribute of the component to false. For details about the focus acquisition capability, see Component Focusability.
Solution
Check whether the current component is focusable and whether focusable is set to true.
150002 Ancestor Component Not Focusable
Error Message
This component has an unfocusable ancestor.
Description
This error code is reported when an ancestor of the current component is not focusable. This error code is of the string type.
Possible Causes
The ancestor component is not focusable by default, or you set the focusable attribute of the component to false. For details about the focus acquisition capability, see Component Focusability.
Solution
Check whether the ancestor component is focusable and whether focusable is set to true.
150003 Component Does Not Exist
Error Message
the component is not on tree or does not exist.
Description
This error code is reported when the ID passed in points to a component that does not exist or is not mounted to the component tree. This error code is of the string type.
Possible Causes
-
The ID passed in does not exist or points to an incorrect component, or the component corresponding to the ID has been destroyed.
-
Focus is requested for a component that is not focusable. For details about such components, see Component Focusability.
Solution
Use the correct ID or component, and ensure that the component is mounted, visible, and focusable.