如何在不停止的情况下将物体移向一个方向 [英] How to move an object towards a direction without stopping

问题描述

我正在使用 SpriteKit 在 Swift 3 中开发一个小游戏，我想将敌人移动到角色的方向，但在任何时候敌人到达角色的初始位置时都会停止.

I'm developing a small game in Swift 3 with SpriteKit and I want to move the enemies to the direction of the character, but at all times the enemies stop when they arrive at the character's initial position.

我正在这样做:

enemigo.name = "enemigo"
enemigo.position = CGPoint(x: 280, y: 100)
enemigo.xScale = 1/1
enemigo.yScale = 1/15
addChild(enemigo)


let movement1 = CGVector(
    dx: (enemigo.position.x - personaje.position.x)*10,
    dy: (enemigo.position.y - personaje.position.y)*10
)

let actionTransaction = SKAction.move(by: movement1, duration: 20)
enemigo.run(actionTransaction)

如何在不停留在角色初始位置的情况下将敌人移动到特定方向?

How should I move the enemies to a specific direction without stopping at the initial position of the character?

推荐答案

您已经完成了确定方向向量的所有艰苦工作.

You've done all the hard work figuring out the vector of direction.

现在您可以重复此moveBy action 随心所欲，敌人会不断朝同一个方向移动，越走越远，因为 move(by: CGVector) 是相对的，而不是绝对的:

Now you can repeat this moveBy action as often as you like, and the enemy will keep moving in the same direction, further and further, because move(by: CGVector) is relative, not absolute:

let actionTransaction = SKAction.move(by: movement1, duration: 20)

所以你需要做的就是永远运行这个用一个键，这样您就可以从任何地方找到它，并随时停止.

So all you need do is run this forever with a key, so you can then seek it out from anywhere, and stop it whenever you like.

run(SKAction.repeatForever(actionTransaction), withKey: "movingEnemy")

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