SwiftUI Debugging Guide

A comprehensive guide for systematically debugging SwiftUI applications, covering common error patterns, debugging tools, and step-by-step resolution strategies.

Common Error Patterns

1. View Not Updating

Symptoms:

• UI doesn't reflect state changes
• Data updates but view remains stale
• Animations don't trigger

Root Causes:

• Missing @Published on ObservableObject properties
• Using wrong property wrapper (@State vs @Binding vs @ObservedObject)
• Mutating state on background thread
• Object reference not triggering SwiftUI's change detection