keywords：UE4, Dynamic Load, Animation Blueprint, LoadObject, LoadClass, 动画蓝图, 资源加载

问题现象

假如用以下方式加载动画蓝图：

FString AnimBPStringTest = "AnimBlueprint'/Game/ThirdPerson/Animations/ThirdPerson_AnimBP.ThirdPerson_AnimBP'";
UAnimBlueprint* AnimationBP = LoadObject<UAnimBlueprint>(NULL, *AnimBPStringTest);

在PIE和Standalone模式下都可加载成功，但是一旦打包运行（打包配置中添加了该资源cook）就会加载失败，并提示如下错误：

LogUObjectGlobals:Warning: Failed to find object 'AnimBlueprint /Game/ThirdPerson/Animations/ThirdPerson_AnimBP.ThirdPerson_AnimBP'
解决办法

貌似动画蓝图比较特殊，用LoadObject无法加载，如果要获取动画蓝图Class，可以通过如下方式加载：

// get the blueprint class reference from the editor
FString AnimClassStringTest = "Class'/Game/mixamo/Heidi/IcloneAnimBP.IcloneAnimBP_C'";

// load the class
UClass* AnimationClass = LoadObject<UClass>(NULL, *AnimClassStringTest);
if (!AnimationClass) return;

// assign the anim blueprint class to your skeletal mesh component
Skeletal3DMeshComponent->SetAnimInstanceClass(AnimationClass);

参考：Why can’t i dynamically load an animation BP in a packaged game
https://answers.unrealengine.com/questions/263863/why-cant-i-dynamically-load-an-animation-bp-in-a-p.html

UE5的方式（UE4中未测试）：

UClass* AnimClass = AnimClass = LoadClass<UAnimInstance>(this,
                    TEXT("AnimBlueprint'/Game/ABP_Test.ABP_Test_C'"));
SKMesh->SetAnimInstanceClass(AnimClass);

二八佳人体似酥，腰间仗剑斩凡夫。虽然不见人头落，暗里教君骨髓枯。 ---唐·吕洞宾