Learn SwiftUI Using Swift Playgrounds for iPad and Mac
“I only have an iPad. Can I use it to develop iOS apps?” This is one of the most common questions for beginners. My answer is always “No, you need a Mac to run Xcode for iOS app development.” “But...
Unable to Set Layout Constraint to Zero in Xcode 11.3
If you’ve upgraded to Xcode 11.3 and you use Interface Builder to create the app UI, you may find it impossible to set the value of spacing constraints to zero. Just open Interface Builder and click “Add new...
A Practical Approach on Using Swift Package Manager in Xcode
Welcome to a new tutorial where I’m going to show you a practical approach on how to create your own Swift packages. If you’re not familiar with that term, a Swift package wraps up code that can be reused in projects,...
Network Framework in iOS: How to Monitor Network Status Changes
Hello folks and welcome! Beyond any doubt, all apps that exchange data with servers need to know one thing all the time: Whether they are connected to Internet or not. When being offline, it’s usually desirable to alter the...
How to Preview Your iOS Apps in Dark Mode Using Xcode 11
Earlier, Apple dropped the first beta of iOS 13 to the public. For a general user, dark mode is definitely the biggest visual change in this release. By flipping an option in Settings, iOS makes everything dark! In dark mode, the...
macOS Programming Tutorial: Working with Alerts, Sheets and Modal Windows
One of the basic, yet vital things a developer should know when creating macOS apps is how to present alerts, system panels or custom windows to their apps. Regardless of how small or big an app is, it will always be necessary to...
Building a Trello-like iOS App with Drag & Drop API
Drag & Drop is the user interaction that works naturally when we want to build an app where user can move data around the screen. It’s being used heavily by apps like Trello, Jira, and many others to move data between boards....
How to Use Xcode Instrument to Optimize Your Swift Code
I still run across curmudgeons who flat out reject techniques like object-oriented programming (especially inheritance and polymorphism), protocols and protocol-oriented programming (especially composition), generics, and...
Dividing and Conquering Your Xcode Projects with Targets
In this tutorial, I’ll show you how to leverage Xcode targets to control the massive complexity involved in building iOS (and macOS, watchOS, and tvOS) apps. A lot of time can be saved when developers realize that not...
Realistic Rendering of 3D Photogrammetry Model in ARKit
In this tutorial, I will go through the entire process of importing a 3D photogrammetry model into ARKit, and make it look as realistic as possible, using the tools that ARKit and SceneKit provide. The finished product:...