ThomasHanning.com

The 5 Best YouTube Channels For iOS Developers

Take a look at my five favorite iOS development YouTube channels. Recently, I made a poll on Twitter: What do you prefer? #programming #iosdev — Thomas Hanning (@hanning_thomas) September 16, 2016 So obviously most people still prefer written tutorials, but at least 25% prefer video tutorials. And YouTube is THE

Why The Removal Of The iPhone Headphone Jack Is Both Brave And Visionary

Apple has removed the headphone jack in the iPhone 7. In my opinion this move is both brave and visionary. After Apple has introduced the iPhone 7, there was a lot of talking going on. Why has Apple removed the headphone jack? And the overall opinion was that this was

The A-Z Of iOS Development

The A-Z of iOS development – or at least a part of it… Autolayout Autolayout is one of the key technologies for defining the layout of iOS apps. At the early days of iOS development, there were just very few screen sizes, so you were able to define the layout very

Embedding a Whole Screen Into a UIScrollView Subsequently

Sometimes you want to add something to a screen and then you become aware that there’s just not enough room. So it would had been a great idea to put everything into a UIScrollView all along. Though it’s a little bit tricky to do it subsequently, it doesn’

UserDefaults

UserDefaults are a great way to persist a small amount of data. In this post we will discuss all the things you need to know. Hint: This post is using Swift 3 and iOS 10 There are several ways to persist data on iOS. You can use for example Core

Structuring UITableViews by Using Enums

UITableViews are obviously one of the most used user interface elements on iOS. However, if you are dealing with UITableViews, that have a lot of different sections, your code can become messy quickly. Even worse, it will become very difficult to change the implementation of the UITableView later on. But

Sorting Arrays in Swift

Sorting arrays is a very common task. Swift has a built-in feature that is fast and easy to use. In this article you’ll learn all the details. Hint: This post is using Swift 3 sort and sorted Imagine we have an array of integers: var intArray = [34,13,14,

Retain Cycles, Weak and Unowned in Swift

Memory management, retain cycles and the usage of the keywords weak and unowned are a little bit confusing. On the other hand it’s very important to understand this topic properly because retain cycles are one of the major reasons for memory problems. But don’t worry! In this article

08/16 – The Best iOS Development Links

The best iOS development links from August 2016. Swift Pattern Matching in Swift: “Pattern matching is one of the most powerful features of any programming language, because it enables you to design rules that match values against each other. This gives you flexibility and simplifies your code. Apple makes pattern

WWDC 2016: The 7 Best Talks

WWDC 2016 is over and there is still a lot to learn. This is a list of my seven favourite WWDC 2016 talks. Improving Existing Apps with Modern Best Practices This talk has a tone of very good ideas and tips. The four main topics are “Reduce Technical Debt”, “Asset

Concurrent Code In Playgrounds

Playgrounds are a very powerful tool, but it hasn’t been possible to execute concurrent code yet. But since Xcode 8, you can do so. Hint: This post is using Swift 3 and Xcode 8 Let’s start by looking at a simple playground example: import UIKit let dispatchQueue = DispatchQueue(

Xcode: Treat Warnings As Errors

It’s important to pay attention to compiler warnings. But in reality many developers tend to ignore warnings. In Xcode there is a very helpful build option called “Treat Warnings as Errors” that will force you to pay attention to warnings. This feature has been available for Objective-C code for

05/16 - The Best iOS Development Links

The best iOS development links from May 2016. News Swift.org – Swift 3.0 Release Process: “Swift 3.0 is a major release that is not source-compatible with Swift 2.2. It contains fundamental changes to the language and Swift Standard Library. A comprehensive list of implemented changes for Swift

100th Blog Post Anniversary

It was a lot of work but I’ve managed to publish 100 blog posts in less than a year. Here you can find a list of all my blog posts sorted by category. Android * Should You Learn iOS Or Android Development? * Android Development For iOS Developers – An Overview Blogging

How To Clean Up Your Xcode Installation?

If you are working on a lot of projects or you are using a lot of test devices, Xcode uses a lot of your disk space. In this post we will discuss how to clean up your Xcode installation. The Xcode Folder Xcode generates a lot of cached data. It’

Should You Learn iOS Or Android Development?

If you want to learn mobile development, you should specialise in one platform. But which platform should you choose? Developing for Android and iOS Let’s face it: In the meantime the general principles of developing for Android and iOS are very similar. Of course, there are different programming languages

How To Deal With Setbacks?

Sometimes we are facing a major setback. In our projects, career or personal life. We can’t undo things, but we can decide how to move on. Accept when the game is over In many cases, it’s not completely lost yet. In that cases we should of course fight.

5 Reasons Being An iOS Developer Is Awesome

There are lot of reasons to like being an iOS developer. But sometimes we have a loss of motivation though. If that happens, you should remind yourself why being an iOS developer is awesome. You are working on technology you are passionated about It’s still not very common to

04/16 - The Best iOS Development Links

The best iOS development links from April 2016. News Apple Worldwide Developer Conference 2016: Everything you need to know about this year’s WWDC: “After an odd semi-unveil via Siri earlier today, Apple this evening officially confirmed that its annual Worldwide Developers Conference would take place from June 13th through

How To Overcome A Temporary Loss Of Motivation?

It doesn’t matter how much you love your work and how passionated you are about it, at some point you will face a temporary loss of motivation. Most of the times, this is due to the so-called “Wall Of Success”. Wall Of Success First of all, there is good

Swift: filter

Swift provides you some handy functions like filter and map for manipulating arrays. In this post we will take a look at filter and how you can combine it with map. Hint: This post has been updated to Swift 3 So, let’s imagine you have an array and you

iOS development

Swift: Use Cases For Guard

The keyword guard has been introduced in Swift 2. It was a little bit inconspicuous at the first sight, but it has a lot of power. In this article we will take a look at three uses cases for guard. Hint: This post has been updated to Swift 3 and

try!

Error handling is a very important topic and I’ve written already a blog post about that topic. You can also check out my talk about that topic on the Swift Summit in San Francisco. In this post we will discuss when you should use try!. Hint: This post has

Swift: The Nil Coalescing Operator

The so-called Nil Coalescing Operator is an interesting operator, that you can use for working with optionals. Hint: This post has been updated to Swift 3 An Example So imagine the following situation: You have an optional value  anOptionalInt and you want to assign the value to a non-optional value.

Building A Simple iOS Calculator App - Part 1

A calculator app is a great example for a simple iOS application. In this tutorial  series we will cover all steps to build one. Introduction This will be a four part tutorial that will cover everything to build a complete calculator iOS app. This app won’t win a design