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Which file in an iOS Swift project is primarily responsible for handling app launch and life cycle events?

easy📝 Conceptual Q11 of 15
iOS Swift - iOS Basics and Setup
Which file in an iOS Swift project is primarily responsible for handling app launch and life cycle events?
AViewController.swift
BAppDelegate.swift
CAssets.xcassets
DInfo.plist
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of AppDelegate.swift

    AppDelegate.swift manages app launch, termination, and state transitions.

  2. Step 2: Compare with other files

    ViewController.swift manages UI screens, Assets.xcassets holds images, Info.plist stores configuration.

  3. Final Answer:

    AppDelegate.swift -> Option B

  4. Quick Check:

    App life cycle = AppDelegate.swift [OK]
Quick Trick: AppDelegate handles app start and life cycle events [OK]
Common Mistakes:
  • Confusing ViewController with AppDelegate
  • Thinking Assets.xcassets manages app life cycle
  • Assuming Info.plist handles launch events

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