如何使用Spritekit和GameplayKit在Swift中为目标移动的GKAgent2D设置动画？

import SpriteKit
import GameplayKit

class GameScene: SKScene, GKAgentDelegate {
    // ...
}

let agent = GKAgent2D()
agent.delegate = self

func agentWillUpdate(_ agent: GKAgent) {
    if agent == self.agent {
        // 更新目标的位置和速度
        agent.position = vector_float2(Float(target.position.x), Float(target.position.y))
        agent.velocity = vector_float2(Float(target.physicsBody?.velocity.dx ?? 0), Float(target.physicsBody?.velocity.dy ?? 0))
    }
}

func agentDidUpdate(_ agent: GKAgent) {
    if agent == self.agent {
        // 更新目标的位置和速度
        target.position = CGPoint(x: CGFloat(agent.position.x), y: CGFloat(agent.position.y))
        target.physicsBody?.velocity = CGVector(dx: CGFloat(agent.velocity.x), dy: CGFloat(agent.velocity.y))
    }
}

let seekGoal = GKGoal(toSeekAgent: agent)

override func update(_ currentTime: TimeInterval) {
    super.update(currentTime)
    
    agent.behavior = GKBehavior(goal: seekGoal, weight: 1.0)
}

let animateAction = SKAction.animate(with: textures, timePerFrame: 0.1)

target.run(SKAction.repeatForever(animateAction))