Today I tried to explain my 6 years old daughter what programming means and what an algorithm does. I encountered scratchjr and was impressed how fast she “wrote” her first program on the ipad. Even if you’re not part of the Kindergarten… Continue Reading
With Adaptive Layout you are able to conditionally install Auto Layout constraints or views. Since iOS8 it is easier than ever to write universal apps for iPhone and iPad devices. Overriding the size class can be an incredibly useful tool in… Continue Reading
Before iOS 7, we had to use either the rowHeight property on UITableView, or the tableView(_:, heightForRowAtIndexPath:) delegate method to specify the height of a table view cell; to make matters worse, we often needed complex calculations to determine the height of… Continue Reading
Apple introduced the concept of adaptive user interfaces in iOS 8 relying on a combination of Auto Layout and size classes. Building user interfaces that adapt to changes in size class became even more important when Apple added slide over… Continue Reading
When your code smells it is often not awful code that makes your hold your nose. Rather it’s a simple indication that something may need to be changed. However when you don’t change and ignore you probably will end with a… Continue Reading
Since the introduction of Swift, our behavior towards nil values have greatly changed. Swift brings type safety, and also works hard to prevent sending messages to nil by introducing Optionals. Optionals force you to write guards around your optional code at… Continue Reading
Today I came across code that implemented a complex login process. The login flow was quite complex but what made the code really difficult to understand was how it was implemented. Notifications, delegates, and long case switch statements were used to implement the login flow.… Continue Reading
Swift comes with some implicitly defined variables – that are variables that are accessible in your code even though you’ve not explicitly defined them. These variables are helpful when logging errors or writing test code. __COLUMN__ (Int): The column number in… Continue Reading
Randomness is the lack of pattern or predictability. We can be sure of one thing, however: in the closed, digital universe of CPU cycles there is no true randomness, only pseudo randomness. Pseudorandomness, is often implemented in a way very… Continue Reading
iOS provides several built-in types of transitions. Navigation controllers push and pop to navigate through an information hierarchy, tab bar controllers switch between sections by changing tabs, and any view controller can present and dismiss another view controller modally for… Continue Reading