IOS on Vasant Patil

iOS Notification Actions Explained for Interview

Sun, 05 Apr 2026 00:00:00 +0000

A concise but complete breakdown of how to add custom actions to iOS push notifications — covering UNNotificationAction, category registration, payload wiring, and the common pitfalls interviewers love to ask about.

Local Notifications and Geofencing in iOS

Sun, 05 Apr 2026 00:00:00 +0000

A practical deep-dive into local notifications in iOS — the three trigger types, permission handling, custom actions, and how to combine UNLocationNotificationTrigger with Core Location to build a geofence-based notification system entirely on-device.

Push Notifications in iOS: A Complete Guide

Sun, 05 Apr 2026 00:00:00 +0000

Everything you need to know about iOS push notifications — from how APNs works under the hood, to setting up remote and local notifications, custom actions, and the questions that come up in every iOS interview.

iOS App Lifecycle: From AppDelegate to SwiftUI — What Every Developer Should Know

Wed, 01 Apr 2026 00:00:00 +0000

There’s a question I ask every iOS candidate I interview: “Walk me through what happens from the moment a user taps your app icon to the moment they’re looking at your home screen.”

Most developers answer this with a list of method names. Senior developers answer it with a mental model. Staff engineers answer it by asking a clarifying question first — “Are we talking UIKit or SwiftUI? What iOS deployment target?” — because the answer genuinely differs, and knowing when it differs is the whole point.