SKAnimatedAction.swift

import UIKit
import SpriteKit

class SKAnimatedAction {
    let movementAction: SKAction
    let animationAction: SKAction
    let animationKey: String
    
    init(movementAction: SKAction, animationAction: SKAction, animationKey: String) {
        self.movementAction = movementAction
        self.animationAction = animationAction
        self.animationKey = animationKey
    }
}

extension SKSpriteNode {
    func run(animatedAction: SKAnimatedAction, completion: (() -> Void)? = nil) {
        run(animatedAction.animationAction, withKey: animatedAction.animationKey)
        
        let sequence = SKAction.sequence([
            animatedAction.movementAction,
            SKAction.run { [weak self] in
                self?.removeAction(forKey: animatedAction.animationKey)
                completion?()
            }
        ])
        
        run(sequence)
    }
}

class MyScene: SKScene {
    override func didMove(to view: SKView) {
        let node = SKSpriteNode(image: "character.png")
        addChild(node)

        node.run(animatedAction: walkingAction()) {
            node.run(animatedAction: self.jumpingAction())
        }
    }

    func walkingAction() -> SKAnimatedAction {
        let moveAction = SKAction.moveTo(x: 50.0, duration: 5.0)
        let animationAction = SKAction.repeatForever(SKAction.animate(with: walkingTextures, timePerFrame: 0.125))
        return .init(movementAction: moveAction, animationAction: animationAction, animationKey: "walk")
    }
    
    func jumpingAction() -> SKAnimatedAction {
        let moveAction = SKAction.moveTo(x: 80.0, duration: 5.0)
        let animationAction = SKAction.repeatForever(SKAction.animate(with: jumpingTextures, timePerFrame: 0.125))
        return .init(movementAction: moveAction, animationAction: animationAction, animationKey: "jump")
    }
}