I would definitely check out the App Development With Swift books by apple on Apple Books.
billysjlk
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
You could use an SKEmitterNode and change the settings so hit looks like a trail.
To make a new emitter node, choose File -> New and search "SpriteKit Particle File".
Name it Trail
Here are the settings I would set:
Texture: spark (this is one of apple's defaults, but you can use your own)
Emitter: birthrate: 20, maximum: 0
Lifetime: start: 8, range: 0
Position: All of these fields set to 0
Alpha: 0.6, range: 0, speed: -0.06
Scale: 1, range: 0, speed: 0
Rotation: All these fields set to 0
Color Blend: factor: 1, range: 0, speed: 0
To use it in code:
let emitterNode = SKEmitterNode(fileNamed: "Trail") // or whatever you named your file
Add it to the node you want to have a trail:
yourNode.addChild(emitterNode)
Hope this helps!