iOS Interview Prep - Improvement Plan

iOS Interview Prep - Improvement Plan

Overview

This document tracks all improvements needed for the iOS interview preparation materials based on the comprehensive review conducted on October 29, 2025.

Current Rating: 8.2/10 Target Rating: 9.5/10 Review Date: October 29, 2025 Last Updated: October 29, 2025

Priority 1: Critical Gaps (Must-Have for Senior Interviews)

1. Privacy & Security Section

New File: ios_privacy_security.md

  • App Privacy Manifest (required iOS 17+)
    • PrivacyInfo.xcprivacy file structure
    • Required reasons APIs
    • Third-party SDK privacy requirements
  • Keychain Services
    • Basic keychain operations
    • Keychain sharing between apps
    • Best practices for sensitive data
  • Biometric Authentication
    • LocalAuthentication framework
    • Face ID/Touch ID implementation
    • Fallback mechanisms
  • App Tracking Transparency
    • ATT framework implementation
    • IDFA handling
    • Privacy-focused alternatives
  • Data Protection Classes
    • File protection levels
    • Background data access

2. Push Notifications & Background Execution

New File: ios_notifications_lifecycle.md

  • Push Notifications
    • UNUserNotificationCenter setup
    • Remote notification configuration
    • Rich notifications (images, actions)
    • Silent push notifications
    • Notification Service Extension
  • Local Notifications
    • Scheduling and triggers
    • Location-based notifications
  • App Lifecycle
    • SceneDelegate patterns (iOS 13+)
    • Multiple window support
    • State restoration
    • App state transitions
  • Background Modes
    • Background fetch
    • Background processing
    • Background URLSession
    • Background location updates

3. Accessibility

New File: ios_accessibility_guide.md

  • VoiceOver Support
    • Accessibility labels and hints
    • Custom actions
    • Accessibility traits
    • Grouped elements
  • Dynamic Type
    • Text scaling implementation
    • Custom font scaling
    • Layout adjustments
  • Voice Control & Switch Control
    • Custom actions
    • Focus management
  • Accessibility Inspector
    • Testing strategies
    • Common issues

4. Deep Linking & Navigation

New File: ios_deeplinks_navigation.md

  • Universal Links
    • AASA file configuration
    • Handling incoming links
    • Fallback strategies
  • Custom URL Schemes
    • Registration and handling
    • Security considerations
  • App Clips (iOS 14+)
    • Configuration and setup
    • Size optimization
    • Data sharing with main app
  • Widget Deep Links
    • Widget URL handling
    • Timeline refresh

Priority 2: Important Updates to Existing Documents

swift_language_features.md

  • Add Sendable protocol section
    • Sendable conformance rules
    • @Sendable closures
    • Actor isolation
  • Expand Swift 6.0 features
    • Strict concurrency checking
    • Complete concurrency annotations
  • Add Swift Macros (Xcode 15+)
    • @Observable macro deep dive
    • Custom macro examples
  • Add Distributed Actors section
  • Add advanced generics patterns
    • Higher-order type constraints
    • Opaque return types edge cases

ios_architecture_patterns.md

  • Add Modular Architecture section
    • Swift Package Manager modularization
    • Feature modules pattern
    • Dependency management
  • Add Compositional Architecture (TCA)
  • Add migration strategies between architectures
  • Add testing architecture decisions guide
  • Add real-world case studies

swiftui_state_management_guide.md

  • Expand @Observable (iOS 17) coverage
    • Migration from ObservableObject
    • Performance implications
    • Use cases and limitations
  • Add @Query for Swift Data
  • Add SwiftUI 5.0+ navigation patterns
    • NavigationStack deep dive
    • NavigationSplitView patterns
  • Add custom property wrappers examples
  • Add derived state patterns
  • Add @EnvironmentObject performance optimization

uikit_mastery_guide.md

  • Add Custom Transitions section
    • UIViewControllerTransitioningDelegate
    • Interactive transitions
    • Custom presentation controllers
  • Add Multiple Scenes management
    • UIWindowScene patterns
    • Multi-window on iPad
  • Add Keyboard Handling section
    • Keyboard avoidance strategies
    • Input accessory views
    • Custom keyboards
  • Add Haptics section
    • UIFeedbackGenerator types
    • Custom haptic patterns

ios_testing_guide.md

  • Add Swift Testing framework (Xcode 16+)
    • @Test attribute
    • Parameterized testing
    • Test traits
  • Add Snapshot Testing section
    • Image comparison testing
    • View hierarchy testing
  • Add Test Plans section
    • Configuration management
    • Parallel testing setup
  • Add CI/CD testing strategies
  • Add flakiness mitigation techniques
  • Add performance testing (XCTMetric)
  • Add memory leak detection strategies

ios_networking_data_guide.md

  • Add Privacy Manifest handling
    • Network privacy requirements
    • Third-party SDK compliance
  • Add HTTP/3 and QUIC details
  • Add proxy and VPN handling
  • Add network privacy settings
  • Add more dependency injection patterns
  • Add GraphQL integration examples

ios_performance_optimization.md

  • Add MetricKit integration
    • Performance metrics collection
    • Diagnostic reporting
  • Add Metal performance section
  • Add Dynamic Island optimization
  • Add Always-on display considerations
  • Add Main Thread Checker deep dive
  • Add network performance profiling

modern_ios_development.md

  • Expand Swift Data coverage
    • Model configuration
    • Migration strategies
    • Query optimization
  • Add SwiftUI 5.0+ features
    • Phase animations
    • scrollTransition modifier
    • containerRelativeFrame
  • Add @Observable vs ObservableObject comparison
  • Add Observation framework details
  • Add SwiftUI/UIKit interop patterns
  • Add macOS/iOS shared code strategies

Priority 3: Nice-to-Have Enhancements

Additional Topics

  • Create ios_debugging_guide.md
    • LLDB commands reference
    • Debugging memory issues
    • Network debugging
    • View hierarchy debugging
  • Create ios_build_deploy.md
    • Xcode configuration management
    • Build settings optimization
    • App Store submission process
    • TestFlight best practices
  • Create ios_widgets_extensions.md
    • Widget development
    • App extensions
    • Intents and Siri integration
  • Create ios_arkit_realitykit.md
    • ARKit basics
    • RealityKit fundamentals
    • Vision Pro considerations

Documentation Improvements

  • Add company-specific interview prep templates
  • Add behavioral question preparation guide
  • Add system design interview patterns for iOS
  • Add code review best practices
  • Add team collaboration patterns

Quick Fixes (< 1 hour each)

Immediate Updates Needed

  • Add iOS 17 @Observable examples to swiftui_state_management_guide.md ✅ October 29, 2025
  • Add Sendable protocol basics to swift_language_features.md ✅ October 29, 2025
  • Add privacy manifest note to ios_networking_data_guide.md ✅ October 29, 2025
  • Update README.md with new file references ✅ October 29, 2025
  • Add iOS 18 and Swift 6.0 notes where applicable ✅ October 29, 2025
  • Fix any broken internal links identified ✅ October 29, 2025
  • Add more error handling examples throughout ✅ October 29, 2025

Tracking Progress

Completion Status by Priority

| Priority | Total Tasks | Completed | Percentage | |———-|————|———–|————| | Priority 1 | 36 | 0 | 0% | | Priority 2 | 48 | 0 | 0% | | Priority 3 | 18 | 0 | 0% | | Quick Fixes | 7 | 7 | 100% | | TOTAL | 109 | 7 | 6.4% |

Document Creation Status

| New Document | Status | Word Count | Reviewer | |————–|——–|————|———-| | ios_privacy_security.md | Not Started | 0 | - | | ios_notifications_lifecycle.md | Not Started | 0 | - | | ios_accessibility_guide.md | Not Started | 0 | - | | ios_deeplinks_navigation.md | Not Started | 0 | - | | ios_debugging_guide.md | Not Started | 0 | - | | ios_build_deploy.md | Not Started | 0 | - | | ios_widgets_extensions.md | Not Started | 0 | - | | ios_arkit_realitykit.md | Not Started | 0 | - |

Existing Document Update Status

| Document | Updates Needed | Updates Complete | Status | |———-|—————|——————|——–| | swift_language_features.md | 5 | 0 | Pending | | ios_architecture_patterns.md | 5 | 0 | Pending | | swiftui_state_management_guide.md | 6 | 0 | Pending | | uikit_mastery_guide.md | 4 | 0 | Pending | | ios_testing_guide.md | 7 | 0 | Pending | | ios_networking_data_guide.md | 6 | 0 | Pending | | ios_performance_optimization.md | 6 | 0 | Pending | | modern_ios_development.md | 6 | 0 | Pending |

Implementation Strategy

Phase 1: Critical Gaps (Week 1-2)

  1. Create privacy & security guide
  2. Create notifications & lifecycle guide
  3. Add Sendable and @Observable to existing docs
  4. Update README with new resources

Phase 2: Accessibility & Navigation (Week 3)

  1. Create accessibility guide
  2. Create deep linking guide
  3. Update architecture patterns with modular approaches

Phase 3: Testing & Performance (Week 4)

  1. Add Swift Testing framework
  2. Add MetricKit integration
  3. Update all performance sections

Phase 4: Modern Features (Week 5)

  1. Expand Swift Data coverage
  2. Add SwiftUI 5.0+ features
  3. Complete all Priority 2 items

Phase 5: Polish & Enhancement (Week 6)

  1. Add nice-to-have guides
  2. Review all documents for consistency
  3. Add cross-references and improve navigation

Success Metrics

Quality Indicators

  • All code examples compile without errors
  • All code follows current best practices (2024/2025)
  • Each topic includes practical interview questions
  • Each guide has clear navigation and TOC
  • Cross-references between documents work
  • Examples cover both simple and complex scenarios

Review Checklist

  • Technical accuracy verified
  • iOS 17/18 features included where relevant
  • Swift 5.9/6.0 syntax used
  • Performance considerations noted
  • Memory management addressed
  • Error handling demonstrated
  • Testing strategies included

Notes

Review Feedback Summary

  • Strengths: Excellent organization, accurate code, modern patterns, practical examples
  • Main Gaps: Privacy/security, accessibility, notifications, app lifecycle
  • Current Rating: 8.2/10 (strong but missing critical senior-level topics)
  • Goal: Achieve 9.5/10 by addressing all Priority 1 & 2 items

Resources Needed

  • Apple Developer Documentation
  • WWDC 2023/2024 session videos
  • iOS 17/18 release notes
  • Swift 5.9/6.0 evolution proposals
  • Real-world app examples for case studies

Risk Factors

  • iOS 18 features may change before final release
  • Swift 6.0 adoption timeline uncertain
  • Some advanced topics may require specialized knowledge

Last reviewed: October 29, 2025 Next review scheduled: November 15, 2025