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Introduction

Building a Weather Application From Scratch

In Mastering MVVM With Swift, we refactor a weather application, Cloudy, built with MVC to use MVVM instead. One of the most common questions I receive is how to build Cloudy from scratch. This series is an answer to that question. We build a weather application that is inspired by Cloudy. The application is aptly named Rainstorm.

in Swift

Working With DateInterval In Swift

Last week, I was browsing Apple's What's New in iOS documentation and noticed that several brand new types were added to the Foundation framework. The one that caught my interest was the NSDateInterval class. In this tutorial, I show you how to use the NSDateInterval class and why it is such an interesting addition to the Foundation framework.

in Foundation

Working With URLComponents In Swift

At times, it can seem as if Foundation is an old, dusty framework that you need to use to get anything done on iOS, tvOS, macOS, or watchOS. Nothing could be further from the truth. Every year, Apple improves the framework and adds new components to better serve developers. In this tutorial, I like to talk about a favorite of mine, the NSURLComponents class or, in Swift, the URLComponents structure.

in Foundation

What Is Any in Swift

What The Swift

Earlier this week, we discovered that AnyObject is a protocol defined in the Swift standard library. In today's installment of "What The Swift", I want to show you what Any is. To discover the meaning of Any, we need to revisit the Swift standard library.

in Standard Library

What Is AnyObject in Swift

What The Swift

If you've spent some time writing Swift, then you've probably come across a variable, constant, or parameter of type AnyObject. And you know what AnyObject is. Right? Don't worry. You're not alone. Let's take a look and dive into the bowels of the Swift standard library to find out.

in Standard Library

Dequeueing Reusable Views With Generics and Protocols

In today's episode, I'd like to show you an elegant example of the power and versatility of generics and protocols. I came across this implementation while browsing the RxDataSources repository a few months ago. I learned the technique I outline in this episode from Segii Shulga. Let me show you what it looks like.

in Swift

Finding and Resolving Memory Issues

Debugging Applications With Xcode

The memory graph debugger built into Xcode is a very welcome addition for debugging memory issues. In the previous episode, we resolved a memory issue we discovered somewhat by accident. While it can be useful to use the memory graph debugger to investigate complex object graphs, it would be convenient if Xcode warns us about possible memory issues. And that's exactly what the memory graph debugger does.

in Xcode

Debugging Memory Issues

Debugging Applications With Xcode

Xcode's built-in view debugger highlights some of the advantages visual debugging has to offer. I hope that the previous episodes have illustrated that debugging user interface issues is more efficient with Xcode's view debugger.

in Xcode

Debugging Applications With Reveal

In Debugging Applications With Xcode, we explored Xcode's built-in view debugger. While I occasionally use Xcode's view debugger to debug user interface issues, I mostly use Reveal, a third party application developed and maintained by Itty Bitty Apps. In this episode, I show you how Reveal compares to Xcode's built-in view debugger and why I prefer Reveal over Xcode to debug user interface issues.

in Tools

Debugging User Interface Issues

Debugging Applications With Xcode

In the previous episode, we explored Xcode's built-in view debugger and you learned how the view debugger can help debug problems related to the user interface. Remember from the previous episode that I introduced several user interface issues in Cloudy. Let's find out how we can leverage the view debugger to discover and resolve these issues.

in Xcode

View and View Controller Debugging

Debugging Applications With Xcode

The past episodes of this series have illustrated how useful breakpoints can be for debugging problems. But Xcode has more in store for us. Not every problem can or should be debugged with breakpoints. Issues related to the user interface of your application are often best tackled with Xcode's built-in view debugger. In this episode, we explore the view debugger built into Xcode.

in Xcode

Test Failure and Constraint Error Breakpoints

Debugging Applications With Xcode

The test failure and constraint error breakpoints are lesser known breakpoint types. When used correctly, however, they can be quite useful. Let's start with the test failure breakpoint.

in Xcode