为什么RepeatForever在Spritekit，Swift3中不起作用

Question

This is my code for test:

    let cloud1 = SKSpriteNode(imageNamed: "cloud1")
    cloud1.position = CGPoint(x: size.width + cloud1.size.width/2, y: size.height / 2)
    addChild(cloud1)
    let wait = SKAction.wait(forDuration: 0.25)

    let actionMove = SKAction.move(to: CGPoint(x: -cloud1.size.width/2, y: cloud1.position.y), duration: 2.0)

    let sequence = SKAction.sequence([actionMove, wait])

    let repeatAction = SKAction.repeatForever(sequence)
    cloud1.run(repeatAction)

This cloud is only run one time, please tell me the solution please

Answer 1

based on your question, I think I might have a solution.

the reason as to why it is not moving after it reaches a certain destination is because you are using moveTo . Here is a little example I made based on the code you have provided.

var cloudSpeed = CGFloat(12) //this can be any number you want, the higher the faster


    let cloud1 = SKSpriteNode(imageNamed: "cloud1")
    cloud1.position = CGPoint(x: size.width/2, y: size.height / 2)
    addChild(cloud1)
    let wait = SKAction.wait(forDuration: 0.25)

    let actionMove = SKAction.move(by: CGVector(dx:-10 * ballSpeed, dy:0), duration: 1) //experiment with the dx value. If you want the cloud to travel from right to left make it a negative

    let sequence = SKAction.sequence([actionMove, wait])

    let repeatAction = SKAction.repeatForever(sequence)
    cloud1.run(repeatAction)

hopefully this solves your problem!