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Which file extension is used for Swift source code files in an iOS project?

easy📝 Syntax Q3 of 15
iOS Swift - iOS Basics and Setup
Which file extension is used for Swift source code files in an iOS project?
A.swift
B.storyboard
C.plist
D.xcassets
Step-by-Step Solution
Solution:

  1. Step 1: Identify Swift source file extension

    Swift source code files always use the .swift extension.

  2. Step 2: Understand other extensions

    .storyboard is for UI layouts, .plist for property lists, and .xcassets for image assets.

  3. Final Answer:

    .swift -> Option A

  4. Quick Check:

    Swift code files = .swift [OK]
Quick Trick: Swift code files end with .swift [OK]
Common Mistakes:
  • Confusing .plist with code files
  • Thinking storyboard files contain code
  • Mixing asset files with code files

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