spritekit

A development guide for building 2D games and interactive animations for iOS 26+ using SpriteKit and Swift 6.3. It applies when creating game scenes with SKScene and SKView, adding sprites with SKSpriteNode, animating with SKAction sequences, simulating physics with SKPhysicsBody and contact detection, creating particle effects with SKEmitterNode, building tile maps, using SKCameraNode, or embedding a scene in SwiftUI with SpriteView.

It explains that SKView presents an SKScene, the root of a node tree the framework renders each frame, and details the per-frame cycle from update through action evaluation, physics simulation, constraints, and final rendering, advising you to override only the callbacks you need. A node-type table covers SKSpriteNode, SKLabelNode, SKShapeNode, SKEmitterNode, SKCameraNode, SKTileMapNode, and more, along with naming and tree-search patterns and using zPosition with ignoresSiblingOrder for draw order.

Animation is handled with immutable, reusable SKAction objects combined via sequence, group, and repeatForever, including texture-based frame animation and timing modes. The physics section shows building bodies from circles, rectangles, or textures, and using categoryBitMask, collisionBitMask, and contactTestBitMask together with an SKPhysicsContactDelegate to detect contacts, with the recommendation to queue hits during simulation and apply mutations in update. It also covers forces and impulses, touch handling via the scene's UIResponder methods and nodes(at:), the camera, and SwiftUI integration, and closes with common mistakes and a review checklist.