SpriteKit Diagnostics

Systematic diagnosis for common SpriteKit issues with time-cost annotations.

When to Use This Diagnostic Skill

Use this skill when:

• Physics contacts never fire (didBegin not called)
• Objects pass through walls (tunneling)
• Frame rate drops below 60fps
• Touches don't register on nodes
• Memory grows continuously during gameplay
• Positions and coordinates seem wrong
• App crashes during scene transitions

Mandatory First Step: Enable Debug Overlays

Time cost: 10 seconds setup vs hours of blind debugging