在GAS中创建异步任务-AsyncTask

example：

UCLASS()
class AURA_API UTargetDataUnderMouse : public UAbilityTask
{
    GENERATED_BODY()

public:

    UFUNCTION(BlueprintCallable, Category = "Ability|Tasks", meta = (DisplayName = "TargetDataUnderMouse", HidePin = "OwningAbility", DefaultToSelf = "OwningAbility", BlueprintInternalUseOnly = "true"))
    static UTargetDataUnderMouse* CreateTargetDataUnderMouse(UGameplayAbility* OwningAbility);

    UPROPERTY(BlueprintAssignable)
    FMouseTargetDataSignature ValidData;//在Activate中广播

private:

    virtual void Activate() override;
};

UTargetDataUnderMouse* UTargetDataUnderMouse::CreateTargetDataUnderMouse(UGameplayAbility* OwningAbility)
{
    UTargetDataUnderMouse* MyObj = NewAbilityTask<UTargetDataUnderMouse>(OwningAbility);
    return MyObj;
}