Sofia Martinez

Sign in with Apple provides secure, privacy-focused authentication required for apps with third-party login. Users create accounts with Face ID or Touch ID, and Apple generates unique identifiers per app. I use ASAuthorizationController to initiate th

Dark mode provides low-light interface that reduces eye strain and saves battery on OLED displays. iOS automatically switches based on system settings or user preference. I use semantic colors like .label, .secondaryLabel, and .systemBackground that a

Haptic feedback provides tactile responses that enhance user experience. iOS offers three feedback generators: UIImpactFeedbackGenerator for physical impacts with light, medium, or heavy intensities; UINotificationFeedbackGenerator for success, warnin

Local notifications alert users without server infrastructure. I use UNUserNotificationCenter to schedule notifications at specific times or locations. Creating a notification requires UNMutableNotificationContent with title, body, and sound, plus a t

WKWebView displays web content with modern WebKit rendering engine. It replaces deprecated UIWebView with better performance and security. I configure WKWebViewConfiguration to customize behavior like JavaScript, cookies, and media playback. Navigatio

StoreKit enables selling digital goods and subscriptions within iOS apps. I request product info from App Store Connect with product identifiers, then display prices in the user's currency. Purchase flows use SKPaymentQueue to add transactions, which