Probably every mobile developer knows these small but annoying bugs: The general toolbar of the app is restyled, and it looks good on 29 out of the total 30 screens but on one of the screens some UI elements moved unnoticed onto the wrong positions. Something like this is easily overseen in manual testing since […]
With async/await Apple introduced yet again another way of making asynchronous calls in Swift. There are now three different ways of making asynchronous calls: Completion handlers, Combine and async/await – If you also take community solutions like RxSwift or ReactiveSwift into account there are even more. What are we actually supposed to use now? Is […]
Are you aware that every Dart method can throw an exception at any time? Many Flutter developers understand exceptions the wrong way because exceptions in Dart are different compared to many other languages. Not only can an exception cause an ugly error, but it can also break the users’ flow. This often results in users […]
Have you ever wondered why we have to use Kotlin for Android and Swift for iOS development? We asked ourselves the same question and came quickly to the conclusion that there might be a way to solve this. Follow us on an adventure where we learn why and how we store source code and how […]
Have you heard of Wordle? Chances are you have as it really went viral on Twitter the past few weeks. It’s a simple game that’s truly addictive. We were also “infected” with the Wordle hype, played a lot, and realized that it’s the perfect project for getting started with SwiftUI! So in less than two […]
With the release of Kotlin 1.5.0, value classes (formerly known as inline classes) are finally stable and were released from their @OptIn annotations. Many were hyped about the release, but it also created a lot of confusion as we now have three very similar tools in Kotlin: Typealises, data classes, and value classes. So which […]
Combine is the new cool kid in town when it comes to reactive programming with Swift, so many developers in the community want to switch from RxSwift to Combine. Both frameworks are very similar, but the devil’s in the details and if you want to make the transition, it really helps to have a clear […]
Mixins are a super-powerful feature in Dart and if you’re developing apps with Flutter, you should use them more often! 💙 In this article, we’ll show you why – and how. What’s a Mixin? Mixins are awesome because they solve a basic problem that comes with inheritance. They are an elegant way to reuse code from […]
Sealed interfaces were just introduced in Kotlin 1.5 and are a very powerful new feature. But with great power comes great responsibility, so we need to learn when to use and when to not use this newly achieved power. In order to understand sealed interfaces and their use cases, let’s accompany our cute little QuickBirdTM […]
When creating a library, we usually strive to support all commonly used package managers. For iOS libraries, the most popular ones are Cocoapods, the Swift Package Manager (SPM), and Carthage.Different package managers have different ways of organizing your project’s dependencies. Thus, supporting multiple package managers is a little challenging. In this article, we’ll show you […]
When your iOS (or macOS) app needs to read data from a nearby Bluetooth device – how do you decode the data included in the BLE characteristics? At QuickBird Medical, we often work with medical devices. Our apps need to safely read health data from those devices via BLE, so we’ve had our fair share […]
Search is a crucial feature for many apps. Flutter already offers some search bar widgets to go with, but as soon as you want to use designs for platforms other than Material (like Cupertino), you run into problems. So what’s the best way to implement a platform-adaptive search widget in Flutter? You’ve come to the […]
“What’s your favorite birthday present?” – This question only makes sense if you received at least one present. Otherwise, you might even perceive it as offensive. So before asking this question, we should better make sure that your list of received presents is non-empty! But let’s start from the beginning… Surprises aren’t always nice… 🎁 As […]
Large, complex apps rely on a robust, yet flexible app architecture. In this article, we’ll show you how to accomplish this goal and how to handle navigation and deep-linking with SwiftUI. With more and more people building production apps in SwiftUI, we recently started a pursuit to try out, discuss and compare different app architectures. […]
When working with any communication or storage medium such as Bluetooth, wi-fi (and even wired networks) or disk storage, data can get corrupted. In such cases, we need to make sure that the data we receive (or read) is the same data that was sent (or written). We need a mechanism to validate the integrity […]
When developing iOS apps with UIKit, many developers have used the Coordinator pattern to abstract away the connections between individual view components. This increases the reusability of view components (such as view controllers), reduces responsibilities of the frequently overcrowded UIViewController implementations and makes connections, such as transitions and data exchange, between view components more visible. […]
It’s rare that you juggle with bits and bytes in Swift because of its neat static type system. Most of the time, you don’t care what’s under the hood – you just work with classes, structs, and enums or primitive types like Int, Float or String. But sooner or later, almost every Swift developer gets […]
When working with any communication or storage medium such as Bluetooth, wi-fi (and even wired networks) or disk storage, data can get corrupted. In such cases, we need to make sure that the data we receive (or read) is the same data that was sent (or written). We need a mechanism to validate the integrity […]
The cool thing about programming is that there is an absolute truth in every Bit: It’s either black or white, 1 or 0, true or false. In theory. But whenever you transmit data or store it somewhere on a physical drive, it can get corrupted. Individual bits can get flipped or even bursts of multiple […]
In this article, we’re going to build some MVI View Models on Android and explore how we can test them efficiently.
We love Swift as a lean and intuitive programming language and recently, SwiftUI made our hearts beat faster for providing us with great tools to create amazing user experiences with very little, simple code. But with the introduction of property wrappers, a lot of @-signs, $-signs and underscores suddenly popped up. Didn’t it just get […]
What do you prefer: creating user interfaces visually or in code? This question has split the Apple developer community for years. Could this year’s WWDC finally mark the end of that? Last year, Apple made a huge step forward in UI development with the introduction of SwiftUI: For the first time, the visual approach and […]
MVI is a common architecture pattern to design your Android apps. There are lots of articles out there about MVI but most of them use RxJava. In this article we instead use Kotlin Coroutines & the Kotlin Flow API to implement an MVI architecture. As a part of this, we specifically explore the new StateFlow […]
Facing the Corona virus, many companies around the globe need to switch to remote work right now. While this is required by law in some places, we see it as our social obligation towards society. Doing home office for a couple of weeks or months won’t kill us – but if we refrain from doing […]
“Your code sucks!” – It’s usually not what the reviewer said, but that’s how we perceive it sometimes when our code is being reviewed. We feel challenged or even provoked. Our pride is at stake! So we either begin lengthy discussions to defend ourselves or we blindly adapt the code for the sake of friendship and […]
In this article, we focus on iOS App Security and show you concrete techniques on how to improve security in your iOS apps.
In this article, we collected best practices to keep your users’ data secure in Android Apps. We are going to talk about how you can implement mobile app security for storing data, communicate between client and server and other aspects like logging and analytics.
Mobile apps often deal with really private and sensitive user data like personal health information or banking information. Losing data or getting hacked, therefore, can have huge consequences. There is no bigger nightmare for any app developer than knowing that his application was involved in a huge data leak scandal and user data was stolen. […]
With SwiftUI and Xcode 11 released just recently, we decided to investigate different app architectures that can be used with SwiftUI. We’re going to look into a rather simple Model-View architecture, the Redux architecture pattern and the ViewState MVVM.
Many people criticized Dart because it was missing features like Extensions that programmers knew and love from other programming languages like C#, Swift or Kotlin.
This Year at Google IO, the Dart team announced three new features. One of them is Dart Extension Methods.
