All Posts

• Toggle iCloud sync on/off for NSPersistentCloudKitContainer
• Read and validate in-app purchase receipt locally using TPInAppReceipt
• Use Xcode Previews with UIKit
• 3 steps to speed up storyboard
• What is Delegate? Understand it by building your own
• How to transition from login screen to tab bar controller
• How to solve invalid_client error in Sign in with Apple
• Open app in specific view when push notification is tapped (iOS 13+)
• Inspect app folder in simulators and real device
• Introduction to Localization (add additional language support to your app)
• How to expand and contract height of a UITableView cell when tapped
• How to implement dynamic height table view cell (self sizing)
• Move view when keyboard is shown (guide)
• How to use scroll view in Interface Builder / Storyboard (Xcode 11)
• Sign in With Apple implementation tutorial
• Zero In-app purchase products returned? Here's a checklist on troubleshooting it
• Allow app created in Xcode 11 to run on iOS 12 and lower
• 5 breaking changes to check before building your app for iOS 13
• Replicating Facebook's Draggable Bottom Card using Auto Layout - Part 2/2
• Replicating Facebook's Draggable Bottom Card using Auto Layout - Part 1/2
• Understanding Reference and Value type
• Embed Preset / Preload database in app with Realm
• Introduction to client-server architecture (frontend backend)
• Using .p8 key file to send push notification
• Solving Keychain Access can't export to .p12
• How to store image into CoreData
• Migrating paid app to free app with In-App Purchase
• Sending remote push notification to app in Testflight / App Store
• Download files sequentially using URLSession inside OperationQueue
• How to set background color on a Stack View
• Introduction to supporting Dynamic Type
• Open app in specific view when push notification is tapped
• Introduction to Multithreading and DispatchQueue
• How to debug app which got launched from tapping push notification
• Open settings app using openSettingsURLString
• How to implement rounded corner image view with shadow
• Get current location using Core Location (Tutorial)
• Is it worth making an app where similar apps already exist in the App Store?
• Getting started on building your own backend REST API using Sinatra
• Using launch arguments / environment variables to simulate in-app purchase purchased and etc
• Solving duplicated / repeating cells in Table view
• How to use Static Table View in View Controllers
• When to use UserDefaults, Keychain, or Core Data
• Free up storage space of your Mac for iOS development
• Replicating Twitter Slide Menu - Part 2 / 2
• Replicating Twitter Slide Menu - Part 1 / 2
• What is escaping closure and when to use it
• Uniquely identify iOS device using DeviceCheck (Tutorial)
• Handling button tap inside UITableView Cell without using tag
• Upload image to server using URLSessionUploadTask
• Implement Push Notification easily using CloudKit
• How to perform action when user tap on push notification (foreground and background)
• Intro to creating UI in code (programmatically) part 2 / 2 - Create Auto Layout Constraint using NSLayoutAnchor
• Intro to creating UI in code (programmatically) part 1 / 2 - Create UI using initializer
• Difference between Try, Try? and Try!
• Fix (Workaround) for Xcode playground stuck in Launching Simulator or Running Playground
• Replicating Spotify's Now Playing UI using Auto Layout - Part 2 / 2
• Replicating Spotify's Now Playing UI using Auto Layout - Part 1 / 2
• Use multiple target / scheme for different server environment URL
• Smoothen your table view data loading using UITableViewDataSource Prefetching
• ELI 5 - Optionals and jargons
• Test your app function without opening simulator and clicking 6 buttons
• Save custom object / type into UserDefaults using Codable
• ELI 5 - Delegate
• Tips for using Xcode Playground
• Parse JSON into struct / object using Decodable protocol
• How to return value from a closure?
• Overview of Closure in Swift
• Perform function (UI update etc) only after all the network requests have completed using Dispatch Group
• NSURLSession / URLSession tutorial for calling web API
• Free Auto Layout Course
• Auto Layout not working Checklist
• What is constraint priority and how to use it
• What is intrinsic content size and the usefulness of it
• Why conflicting constraint happen and how to solve them
• Why missing constraints appear and how to solve them
• How Auto Layout calculates view position and size
• Frame based layout VS Auto Layout using constraint
• Check if user has purchased in-app item / product using Keychain
• 3 ways to pass data between view controllers (forth and back)
• How to use UIScrollView With AutoLayout in Interface Builder / Storyboard
• Show price in 2 decimal places using NumberFormatter
• How to view rounded corners, borders in Interface Builder
• How to run iOS app on another Mac's iOS Simulator