# 使用动画 ## 使用属性动画 ArkUI开发框架在NDK接口主要提供属性动画，实现组件出现/消失转场。同时，可以通过Node-API桥接ArkTS侧帧动画能力，实现Native侧的动画效果。 > **说明：** > > - 需要从ArkTS侧获取[this.getUIContext()](../reference/apis-arkui/arkui-ts/ts-custom-component-api.md#getuicontext)，传入到Native侧。 > > - 在Native侧通过[OH_ArkUI_GetContextFromNapiValue](../reference/apis-arkui/native__node__napi_8h.md)方法获取context。 > > - 需要执行的动画属性变化必须写在[ArkUI_ContextCallback](../reference/apis-arkui/_ark_u_i___context_callback.md)中callback中。 > > - 需要执行的动画属性,必须在执行动画之前设置过。 提供全局animateTo显式动画接口，来指定由于闭包代码导致的状态变化插入过渡动效。同属性动画，布局类改变宽高的动画，内容都是直接到终点状态。 1. 在.ets文件中获取[UIContext](../reference//apis-arkui/js-apis-arkui-UIContext.md#uicontext)，把this.getUIContext()当做参数输出到Native方法中。 ```ts // createNativeNode是Native侧暴露的方法 nativeNode.createNativeNode("xcomponentId", this.getUIContext()); ``` 2. 解析UIContext转换C中的context对象。 ``` // 获取ets测传入的context ArkUI_ContextHandle context = nullptr; // 通过code 判断是否获取成功 auto code = OH_ArkUI_GetContextFromNapiValue(env, args[1], &context); ``` 3. 获取ArkUI_NativeAnimateAPI_1 对象。 ``` // 获取ArkUI_NativeAnimateAPI接口 ArkUI_NativeAnimateAPI_1 *animateApi = nullptr; OH_ArkUI_GetModuleInterface(ARKUI_NATIVE_ANIMATE, ArkUI_NativeAnimateAPI_1, animateApi); ``` 4. 设置 ArkUI_AnimateOption参数，通过提供的C方法设置对应的参数。 ``` ArkUI_AnimateOption *option = OH_ArkUI_AnimateOption_Create(); OH_ArkUI_AnimateOption_SetDuration(option, 2000); OH_ArkUI_AnimateOption_SetTempo(option, 1.1); OH_ArkUI_AnimateOption_SetCurve(option, ARKUI_CURVE_EASE); OH_ArkUI_AnimateOption_SetDelay(option, 20); OH_ArkUI_AnimateOption_SetIterations(option, 1); OH_ArkUI_AnimateOption_SetPlayMode(option, ARKUI_ANIMATION_PLAY_MODE_REVERSE); ArkUI_ExpectedFrameRateRange *range = new ArkUI_ExpectedFrameRateRange; range->min = 10; range->max = 120; range->expected = 60; OH_ArkUI_AnimateOption_SetExpectedFrameRateRange(option, range); ``` 5. 设置回调参数。 ``` // 用户自定义参数 struct UserData{ int32_t data; }; UserData *onFinishUser = new UserData; onFinishUser->data= 101; // 设置完成的回调 ArkUI_AnimateCompleteCallback *completeCallback = new ArkUI_AnimateCompleteCallback; completeCallback->userData = onFinishUser; completeCallback->type = ARKUI_FINISH_CALLBACK_REMOVED; completeCallback->callback = [](void *userData) { OH_LOG_Print(LOG_APP, LOG_INFO, LOG_PRINT_DOMAIN, "Manager", "CreateNativeNode onFinishCallback %{public}d", reinterpret_cast(userData)->a); }; // 用户自定义参数 UserData *eventUser = new UserData ; eventUser->data= 201; static bool isback = true; ArkUI_ContextCallback *update = new ArkUI_ContextCallback; update->userData = eventUser; update->callback = [](void *user) { OH_LOG_Print(LOG_APP, LOG_INFO, LOG_PRINT_DOMAIN, "Manager", "CreateNativeNode animateTo %{public}d", reinterpret_cast(user)->data); // 对应的属性变化 width height if (isback) { ArkUI_NumberValue custom_widthValue[] = {200}; ArkUI_AttributeItem custom_widthItem = {custom_widthValue, 1}; ArkUI_NumberValue custom_heightValue1[] = {80}; ArkUI_AttributeItem custom_heightItem1 = {custom_heightValue1, 1}; nodeAPI->setAttribute(textInput, NODE_WIDTH, &custom_widthItem); nodeAPI->setAttribute(textInput, NODE_HEIGHT, &custom_heightItem1); } else { ArkUI_NumberValue custom_widthValue[] = {100}; ArkUI_AttributeItem custom_widthItem = {custom_widthValue, 1}; ArkUI_NumberValue custom_heightValue1[] = {40}; ArkUI_AttributeItem custom_heightItem1 = {custom_heightValue1, 1}; nodeAPI->setAttribute(textInput, NODE_WIDTH, &custom_widthItem); nodeAPI->setAttribute(textInput, NODE_HEIGHT, &custom_heightItem1); } }; // 执行对应的动画 animateApi->animateTo(context, option, update, completeCallback); ``` ![GIF](figures/animateTo.gif) ## 组件出现/消失转场 组件内转场通过NODE_XX_TRANSITION属性（XX包括：OPACITY、TRANSLATE、SCALE、ROTATE、MOVE）配置转场参数，在组件插入和删除时显示过渡动效（通过NODE_TRANSFORM_CENTER属性设置NODE_SCALE_TRANSITION和NODE_ROTATE_ROTATE动效的中心点坐标）。主要用于容器组件中子组件插入和删除时，提升用户体验。 1. 创建可交互界面，界面中包含Button，点击可以控制转场节点的添加和移除。其中 ArkUI_NodeContentHandle 类型节点的获取与使用可参考[接入ArkTS页面](ndk-access-the-arkts-page.md)。 ``` constexpr int32_t BUTTON_CLICK_ID = 1; bool flag = false; ArkUI_NodeHandle parrentNode; ArkUI_NodeHandle childNode; ArkUI_NodeHandle buttonNode; void mainViewMethod(ArkUI_NodeContentHandle handle) { ArkUI_NativeNodeAPI_1 *nodeAPI = reinterpret_cast( OH_ArkUI_QueryModuleInterfaceByName(ARKUI_NATIVE_NODE, "ArkUI_NativeNodeAPI_1")); ArkUI_NodeHandle column = nodeAPI->createNode(ARKUI_NODE_COLUMN); ArkUI_NumberValue widthValue[] = {{.f32 = 500}}; ArkUI_AttributeItem widthItem = {.value = widthValue, .size = sizeof(widthValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(column, NODE_WIDTH, &widthItem); ArkUI_NumberValue heightValue[] = {{.f32 = 500}}; ArkUI_AttributeItem heightItem = {.value = heightValue, .size = sizeof(heightValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(column, NODE_HEIGHT, &heightItem); ArkUI_NodeHandle buttonShow = nodeAPI->createNode(ARKUI_NODE_BUTTON); ArkUI_NumberValue buttonWidthValue[] = {{.f32 = 200}}; ArkUI_AttributeItem buttonWidthItem = {.value = buttonWidthValue, .size = sizeof(buttonWidthValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(buttonShow, NODE_WIDTH, &buttonWidthItem); ArkUI_NumberValue buttonHeightValue[] = {{.f32 = 50}}; ArkUI_AttributeItem buttonHeightItem = {.value = buttonHeightValue, .size = sizeof(buttonHeightValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(buttonShow, NODE_HEIGHT, &buttonHeightItem); ArkUI_AttributeItem labelItem = {.string = "show"}; nodeAPI->setAttribute(buttonShow, NODE_BUTTON_LABEL, &labelItem); ArkUI_NumberValue buttonOpenTypeValue[] = {{.i32 = static_cast(ARKUI_BUTTON_TYPE_NORMAL)}}; ArkUI_AttributeItem buttonOpenTypeItem = {.value = buttonOpenTypeValue, .size = sizeof(buttonOpenTypeValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(buttonShow, NODE_BUTTON_TYPE, &buttonOpenTypeItem); ArkUI_NumberValue buttonShowMarginValue[] = {{.f32 = 20}}; ArkUI_AttributeItem buttonShowMarginItem = {.value = buttonShowMarginValue, .size = sizeof(buttonShowMarginValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(buttonShow, NODE_MARGIN, &buttonShowMarginItem); nodeAPI->registerNodeEvent(buttonShow, NODE_ON_CLICK, BUTTON_CLICK_ID, nullptr); nodeAPI->addNodeEventReceiver(buttonShow, OnButtonShowClicked); parrentNode = column; buttonNode = buttonShow; nodeAPI->addChild(column, buttonShow); OH_ArkUI_NodeContent_AddNode(handle, column); } ``` 2. 创建一个设置了Transition属性的节点，当目标节点上下树时会播放转场动画。 ``` ArkUI_NodeHandle CreateChildNode() { ArkUI_NativeNodeAPI_1 *nodeAPI = reinterpret_cast( OH_ArkUI_QueryModuleInterfaceByName(ARKUI_NATIVE_NODE, "ArkUI_NativeNodeAPI_1")); ArkUI_NodeHandle image = nodeAPI->createNode(ARKUI_NODE_IMAGE); ArkUI_AttributeItem imageSrcItem = {.string = "/pages/common/scenery.jpg"}; nodeAPI->setAttribute(image, NODE_IMAGE_SRC, &imageSrcItem); ArkUI_NumberValue textWidthValue[] = {{.f32 = 300}}; ArkUI_AttributeItem textWidthItem = {.value = textWidthValue, .size = sizeof(textWidthValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_WIDTH, &textWidthItem); ArkUI_NumberValue textHeightValue[] = {{.f32 = 300}}; ArkUI_AttributeItem textHeightItem = {.value = textHeightValue, .size = sizeof(textWidthValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_HEIGHT, &textHeightItem); ArkUI_NumberValue transformCenterValue[] = {0.0f, 0.0f, 0.0f, 0.5f, 0.5f}; ArkUI_AttributeItem transformCenterItem = {.value = transformCenterValue, .size = sizeof(transformCenterValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_TRANSFORM_CENTER, &transformCenterItem); ArkUI_NumberValue rotateAnimationValue[] = {0.0f, 0.0f, 1.0f, 360.0f, 0.0f, {.i32 = 500}, {.i32 = static_cast(ARKUI_CURVE_SHARP)}}; ArkUI_AttributeItem rotateAnimationItem = {.value = rotateAnimationValue, .size = sizeof(rotateAnimationValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_ROTATE_TRANSITION, &rotateAnimationItem); ArkUI_NumberValue scaleAnimationValue[] = { 0.0f, 0.0f, 0.0f, {.i32 = 500}, {.i32 = static_cast(ARKUI_CURVE_SHARP)}}; ArkUI_AttributeItem scaleAnimationItem = {.value = scaleAnimationValue, .size = sizeof(scaleAnimationValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_SCALE_TRANSITION, &scaleAnimationItem); ArkUI_NumberValue translateAnimationValue[] = { 200, 200, 0.0f, {.i32 = 500}, {.i32 = static_cast(ARKUI_CURVE_SHARP)}}; ArkUI_AttributeItem translateAnimationItem = {.value = translateAnimationValue, .size = sizeof(translateAnimationValue) / sizeof(ArkUI_NumberValue)}; nodeAPI->setAttribute(image, NODE_TRANSLATE_TRANSITION, &translateAnimationItem); return image; } ``` 3. 在Button的监听回调里添加转场节点上下树逻辑，以此控制转场节点的入场和出场。 ``` void OnButtonShowClicked(ArkUI_NodeEvent* event) { if (!event) { return; } if (!childNode) { childNode = CreateChildNode(); } ArkUI_NativeNodeAPI_1 *nodeAPI = reinterpret_cast( OH_ArkUI_QueryModuleInterfaceByName(ARKUI_NATIVE_NODE, "ArkUI_NativeNodeAPI_1")); if (flag) { flag = false; ArkUI_AttributeItem labelItem = {.string = "show"}; nodeAPI->setAttribute(buttonNode, NODE_BUTTON_LABEL, &labelItem); nodeAPI->removeChild(parrentNode, childNode); } else { flag = true; ArkUI_AttributeItem labelItem = {.string = "hide"}; nodeAPI->setAttribute(buttonNode, NODE_BUTTON_LABEL, &labelItem); nodeAPI->addChild(parrentNode, childNode); } } ``` ![zh-cn_image_0000001903284256](figures/zh-cn_image_0000001903284256.gif)