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Training and Instructional Design
Tag: objective-c
This Old App: Models in the Playgrounds
Back a few months ago, an app of mine was removed from the App Store for being too old and not updated enough. In this series of articles I’ll document what I did on rebuilding and improving the app. In our first installment I…
Converting Objective C to Swift : The Circular Picker View Example
Swift is a new language. Objective C is not. Sometimes you have some Objective C code and want to make it into Swift code. I had a case of that this week when a reader asked me about continuous picker view wheels. If you…
Living Without Storyboards or Interface Builder: Grids and a Grid Class
Using Grids As Steve Jobs liked to say… “Oh, and one more thing more thing.” In my last post Living without Storyboards or Interface Builder, I mentioned scribbling on a piece of paper. I do that often, but it is helpful to go one…
SlippyFlippy 1.1: Adding a Fading-in and out Label with Background in SpriteKit
Today we have a bug to deal with in SlippyFlippyPenguin. There are a two reports of when a user selects the hard skill level the game immediately goes to game over. I cannot find anything that is different in the code to account for…
from Apple to Raspberry Pi: Making Classes in Python
Objective-C and Python are similar when it comes to defining new classes, but be careful with their differences. In Objective-C we would define a class with two files: a header and an implementation file. In the header we would declare properties like this And…
The Slippy Flippy Dare: How to Use Basic Physics in Sprite Kit
In the last installment of this series I showed two kinds of animation: SKAction and using the update: method from frame animation. The third major type of animation is using the physics engine. A physics engine takes the mathematical laws of physics and adds…
From Apple to Raspberry Pi: While Loops
In Xcode, both in Objective-C and C, we have the while loop. The python equivalent is also while Since we already understand the block, know sometimes as a suite in Python, while loops in Python are very simple to use. We can use break…
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