Learn How to Create iOS Apps
Updated for Xcode 13
Developing apps for the Mac or the various iOS devices requires knowledge of Xcode. Xcode is a complete developer toolset that provides all the software necessary to start coding.
The download is free and can be grabbed via the Mac App Store or via developer.apple.com. There is a lot going on in the Xcode interface, but it isn’t too tricky to start once you know where the basics are.
There may be some of you interested in finding a cheap Mac so that you can begin developing iOS apps. Apple requires that you use a Mac to develop iOS apps. For those of you who already have a Mac, that’s great news as you can go ahead and download a free copy of xcode from the Mac App store, or direct from the Apple Developer website.
For those who do not have access to a Mac and are looking for a cheap option, [Read more…]
To create apps for Apple devices you need to download Xcode. The current version is Xcode 16, or to be precise its currently 16.3 as of April 2025.
You down grab the Xcode download either from the Mac App Store or from the Apple Developer website where you can find the latest production copy, or download the latest beta version.
[Read more…]Starting at the beginning in iOS developing can be quite overwhelming. My first thoughts were to just crack on with loading up Xcode and creating my first very simple app. The first hurdle I got to was that Xcode just has too many options that I don’t understand. On opening it you get to create a new project, but deciding what options to select is a challenge in its self.
The good news is that Apple doesn’t leave you guessing. It has some very nice resources to help you understand exactly what you need to create your first application. Rather than trying to jump in at the deep end, realising its actually quite difficult and then turning away from iOS developing, I first of all recommend that you read several of the official help series articles from Apple.
[Read more…]I started DevFright towards the end of 2012 with the aim to document what I learn when practicing to code. I started off jumping in to a book called “Objective-C for Dummies” and although the instruction was quite clear, I quickly found that I lacked some understanding of how a few of the basics worked.
Apple has created a handy guide on how to begin learning to create iOS apps. The new guide goes over what you need, where to begin and what documents you need to read to get going. Currently, I am working through the Apple documents and an Objective-C for dummies book found in Week 1 and to be blunt… it’s a lot of reading.
On your path of leaning, expect to be doing a lot of reading and a lot of coding to practice what you are learning. I have found that one of the keys to learning is trying to stop and understand the challenge that you just did. That could be creating a new struct, typedef or even something completely different. If you don’t understand why you are doing something the way you are being taught, then step back and try look at the bigger picture of what you are doing.
Lecture 3 of CS106A covers the last 3 chapters of Karel the Robot. In particular, it covers stepwise refinement, algorithms as well as gives more details about SuperKarel and what extras he can do. Karel is coming to an end after this lecture, at which point you will move on to specific Java rather than being stuck at Java with the limitations of Karel.
Although all lectures are important to watch and take note, this one provides some good examples of the top-down design approach and how you break a program down/decompose it with stepwise refinement. It’s well worth watching and paying attention to this part. [Read more…]
I briefly mentioned in my post titled What is Top-down Design and Stepwise Refinement? about pre-conditions and post-conditions. In this post I want to explain the two essential points in greater detail.
These two principles are one of the keys to being effective in programming.
Lets start with the first of the two which is titled pre-conditions. A pre-condition in its most simple form is a condition that needs to be “true” for a method to be called. This means that the method you are calling is expecting something to be in place before or at the point of the method being called. [Read more…]
Near the beginning of learning Java, you will hear something about top-down design, stepwise refinement and decomposition. This post today will explain what those terms mean as well as provide the reason why you need to tackle programming design with this approach in mind.
Just for the sake of clarity, top-down design is the process of stepwise design and decomposition.
Before you start writing any code for a new program you want to create, you first need to design the program or at least have a specification so that you know exactly what you need to create. [Read more…]
I just wrote about what a class is, in basic terms for those beginning on the CS106A course at Stanford on iTunes U. The next item I want to cover is what a method is.
Java allows you to create methods. In simple and beginner terms (meaning those working on programming with Karel), a method is a set of instructions that can be called on by name to execute. In a few of my previous posts I have already written about methods although I haven’t taken the time to explain exactly what a method is. [Read more…]
