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I set it to SwiftUIButton but you’re free to use any other name. First, fire up Xcode and create a new project using the Single View Application template. Okay, let’s start with the basics and create a simple button using SwiftUI.

Swipe navigation and touch based gestures aren’t particularly new, they’ve been on the iPad for a while, and for Mac users with trackpads or a Magic Mouse, within OS X too for navigating within Safari, Chrome, Firefox, Mission Control, skipping between Spaces, moving about the Finder, and, pretty much identical to this trick for iOS yet for OS X, go back within a lot of Mac apps too. Creating a New Project with SwiftUI enabled. It’s still handy on the iPad too, but be sure to use a single finger or touch point, otherwise you may wind up unintentionally triggering the app switcher or one of the other iPad specific gestures instead. Once you get the hang of it, you’ll find the back-swipe gesture can make it easier to go back a page/panel when using a smaller screened device with a single hand, like an iPhone or iPod touch, since it can be activated with just a move of the thumb. It’s likely more strict to avoid accidentally triggering, but it does give it a slight learning curve to master. It does take a bit of practice, but usually after a few tries you’ll perfect it rather quickly, even if it’s not nearly as forgiving as some of the other iOS gestures, like the one to quit an app. Either of those tricks works, but the outside edge method may be easiest for most users. The right-swipe gesture must be initiated from the outside edge of the screen, or almost perfectly horizontal, to trigger the back movement, otherwise you’ll likely scroll slightly down or up instead.

Swipe to the right from the edge of the display to go back, try to make the swipe as horizontal as possible.Navigate within a compatible app so that a “Back” choice is optional, be it to a new web page or deeper in a Settings screen panel.You just have to add a static variable to a class to keep a shared instance of the class itself, and you are done. The singleton pattern is very quick to implement, especially in Swift, and it works well. As your users navigate through the screens of your app and interact with it, you need to keep a global state that tracks all the changes the user makes to the data.Īnd this is where most iOS developers reach for the obvious, but incorrect, solution: the singleton pattern. State propagation across view controllers is vital in any iOS app. I myself have fallen into this trap in the past. One of the most common iOS development bad practices arises when passing state between the view controllers of an app. I realized that, like many iOS developers, I had succumbed to some classic pitfalls of bad coding practices.

From then on, the problems in my code started to stick out like a sore thumb.

Not much later, I started reading about some best practices. I had the typical developer hubris: we often think that what we do is great and others don’t get it. I dismissed their judgement, thinking that my code was great and there was no way it could be improved. Although they said the quality of the code was not bad, they pointed to the fact that the code was hard to maintain and to test (unit testing was not very popular in iOS development back then). When their response came back, the verdict was different than I thought.

That didn’t bother me, because I thought my code was impeccable and that the review company would say the same. Part of this process involved sending the code of the app I wrote to a third party for review.

Big companies, especially banks, usually have processes in place to ensure that their software is secure, robust, and maintainable. A few years ago, when I was still an employee in a mobile consultancy, I worked on an app for a big investment bank.

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