Robert Pieta

Swift

Swift DateFormatter Cheatsheet, Formulas, And Examples

Learn how to use DateFormatter to parse, format, and extract components from Dates. Use the cheatsheet to create DateFormatter formulas.

Email Template To Get Beta Testers

Use this email template to ask someone to become a beta tester for your app

Swift

Learn Swift for C++ Developers

Learn how to program in Swift with side-by-side C++ examples, covering topics from variable assignment to generics.

Swift

Face ID and Touch ID in Swift

Learn how to add Face ID and Touch ID to iOS and macOS apps using the Local Authentication Framework in Swift.

Core Data

Core Data Background Fetch, Save, & Create

Learn how to create new objects, perform fetch requests, and save a managed object context on a background thread using Core Data in Swift.

Swift

Batch Delete And Delete Everything In Core Data

Learn how to delete multiple objects, batch delete, and delete everything in Core Data with Swift.

Core Data

Core Data Fetch Requests In Swift

Learn how to make queries using fetch requests in Core Data for objects by ID, predicate, and entity with Swift.

Swift

Secure Random Numbers and Data in Swift

Learn how to generate secure random data and numbers in Swift using the Security framework.

Swift

Getters and Setters in Swift

Learn how to implement getters and setters for Swift properties, and learn about Swift 5.5 support for getters that can throw an error.

Swift

Comments in Swift

Learn how to add single line, multi-line, and markdown comments in Swift, and how to add Quick Help documentation in Xcode.

Swift

Async / Await in Swift

Learn how to use async and await in Swift by example. Async and await are new Swift 5.5 keywords to help implement asynchronous programming.

UI

Crop UIImage In Swift

Learn how to crop UIImages in Swift to different boundaries, including centering and circular crops like social media apps.