SpriteKit - create random objects and move them using deltatime

Question

In my game, I want to call a function every few seconds that creates random objects from an array. I am currently moving these objects using SKAction as follows:

func createRandmoObject() { let random = arc4random_uniform(4) randomObject = randomObjects[random] randomObject.runAction(SKAction.moveTo(CGPoint(x: randomObject.position.x, y: 0 - randomObject.size.height), duration: 3)) addChild(randomObject) } 

and when the object hits the player, it is deleted, then the function is called again. The problem with this method is that I found that the movement of an object is not always smooth, when the frame rate drops for some reason, sobriety occurs. Now I know how to calculate the delta time in the update method, but I'm not sure how to apply it to an object when this object continues to change, and not always on the screen, and there are some other objects like this (let them think of them as enemies , and there is another function that creates another enemy). How can I make these random objects move according to deltopathy instead of SKAction?

Answer 1

Although you can use SKAction in spritekit projects if your game is physics based, you should use the update method for all your sprite movements. SKactions are suitable for simple games, but if your game includes collisions and random movements, then the update method is the choice.