如何更改执行的SpriteKit操作的持续时间 [英] How to change duration of executed SpriteKit action

问题描述

我正在执行以下SpriteKit操作：

I am executing the following SpriteKit action:

    SKAction *moveLeft = [SKAction  moveByX:-moveX y:0 duration:moveDuration];
    SKAction *moveRight = [moveLeft reversedAction];
    SKAction *sequence = [SKAction sequence:@[moveLeft, moveRight]];

    [my_node runAction [SKAction repeatActionForever:sequence]];

我想减慢动作几秒钟（这是由于用户点击而发生的） ，然后恢复到正常速度。我尝试过这样做：

I want to slow down the action for few seconds (this happens as a result of a user tap), and after that return to the normal speed. I have tried to do so by using

    [my_node runAction [SKAction speedTo: 0.5 duration: 10]];

但它不起作用（节点暂停此持续时间而不是减速）。由于对象永远移动，我无法移除操作并替换为另一个（因为它位于其路径的中间）。

But it didn't work (the node halts for this duration instead of slowing down). Since the object is moving forever, I am not able to remove the action and replace with another one (since it is in the middle of its path) .

任何想法如何正确执行此操作？

Any ideas how to execute this properly?

推荐答案

将序列设为ivar或属性。然后在任何时候你可以这样做来减慢它：

Make sequence an ivar or property. Then at any time you can do this to slow it down:

sequence.speed = 0.5;

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