Tools

• UIColor.io — Convert HEX & RGB colors to UIColor
• WTF Auto Layout — Easily examine Auto Layout errors
• Xcodes - To easily install and switch between Xcode versions
• AASA Validator — Apple App Site Association / Universal Link Validator
• NSDateFormatter — Interactive Date Formatting Cheat Sheet for Swift
• String Format Specifiers — To use parameters when formatting a String
• Screen Sizes and Resolutions — For all iPhone devices

Apple

• Z1 Apple Team Dashboard
• Apple Downloads
• Xcode Releases
  • Useful for Setup Xcode

Tutorials

• Using weak self - When to use it and why
• How to use SFSafariViewController - navigation to web page without leaving the app
• DeepLinking: Schemes and Universal Links
• Capture List in closures - how they capture variables
• Loading fonts dynamically — without adding them to the bundle
• If let case - Using pattern matching for enums

UIKit