OH_ArkUI_PostFrameCallback

arkui_sys::native_node_napi

Function OH_ArkUI_PostFrameCallback 

Source 
pub unsafe extern "C" fn OH_ArkUI_PostFrameCallback(
    uiContext: ArkUI_ContextHandle,
    userData: *mut c_void,
    callback: Option<unsafe extern "C" fn(nanoTimestamp: u64, frameCount: u32, userData: *mut c_void)>,
) -> i32
Available on crate features api-12 and api-18 only.
Expand description

Register a callback to be executed when rendering in the next frame. Cannot be called on the non-UI thread. Checking for non-UI thread calls will abort.

§Arguments

  • uiContext - ArkUI_ContextHandle.

  • userData - Indicates the custom data to be saved.

  • callback - Custom callback function.

  • nanoTimestamp - Timestamp of frame signal.

  • frameCount - Frame count.

§Returns

  • Returns the result code. Returns [ARKUI_ERROR_CODE_NO_ERROR] if the operation is successful. Returns [ARKUI_ERROR_CODE_CAPI_INIT_ERROR] if the CAPI init error. Returns [ARKUI_ERROR_CODE_UI_CONTEXT_INVALID] if the uiContext is invalid. Returns [ARKUI_ERROR_CODE_CALLBACK_INVALID] if the callback function is invalid.

Available since API-level: 18