Adventures in Swift and iOS App Development
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 analyzed the changes necessary. In this second installment, I’ll start making the …
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 are familiar with the date picker it goes from 0 to …
Continue reading "Converting Objective C to Swift : The Circular Picker View Example"
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 step further: use a preset grid. The web building world, at …
Continue reading "Living Without Storyboards or Interface Builder: Grids and a Grid Class"
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 this except user error. I think the user error is users …
Continue reading "SlippyFlippy 1.1: Adding a Fading-in and out Label with Background in SpriteKit"
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 possibly public methods In the implementation file we would have the …
Continue reading "from Apple to Raspberry Pi: Making Classes in Python"
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 them to the scene. It removes the developer from the math …
Continue reading "The Slippy Flippy Dare: How to Use Basic Physics in Sprite Kit"
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 in a loop to break execution. This is a valid loop …
