一. Actor引入头文件

#include "Components/TimelineComponent.h"

声明CurveFloat 和 TimelineComponent

	UPROPERTY(EditAnywhere,BlueprintReadWrite,Category = "MyCurve")
	UCurveFloat* MyCurveFloat;
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "MyCurve")
	UTimelineComponent* MyTimeline;

	FOnTimelineFloat TimelineDelegate;
	FOnTimelineEvent TimelineFinishedDelegate;
	UFUNCTION()
	void TimelineStart(float value);

二.Timeline 逻辑

TimelineActor中构造函数里创建组件

MyTimeline = CreateDefaultSubobject<UTimelineComponent>(TEXT("MyTimeLineComponent")); 

绑定一个时间轴执行时事件，一个时间轴完成事件。

设置浮点曲线，设置数组循环（不循环）。

	Super::BeginPlay();
	TimelineDelegate.BindUFunction(this,TEXT("TimelineStart"));   //dailiyoucanshu
	TimelineFinishedDelegate.BindUFunction(this,TEXT("TimelineFinished"));
	MyTimeline->AddInterpFloat(MyCurveFloat,TimelineDelegate);
	MyTimeline->SetLooping(false);
	MyTimeline->PlayFromStart();
	//MyTimeline->Play();
	MyTimeline->SetTimelineFinishedFunc(TimelineFinishedDelegate);   //

将代理完成

void AMyTimeLineActor::TimelineStart(float value)
{
	GEngine->AddOnScreenDebugMessage(-1,5.0f,FColor::Red,FString::Printf(TEXT("Timelineplay %f"),value));
	float YawRotation = FMath::Lerp(0,90,value);
	MyDoorMesh->SetRelativeRotation(FRotator(0,YawRotation,0));
}

void AMyTimeLineActor::TimelineFinished()
{
	GEngine->AddOnScreenDebugMessage(-1,5.0f,FColor::Red,TEXT("TimelineFinshed"));

}

创建浮点曲线

赋值曲线

效果：