Introduction We recently announced the release of the Realm Flexible Sync preview—an opportunity for developers to take it for a spin and give us feedback. That article provided an overview of the benefits of flexible sync and how it works. TL;DR: You typically don’t want to sync the entire backend database…

Introduction Realm natively provides a broad set of data types, including Bool, Int, Float, Double, String, Date, ObjectID, List, Mutable Set, enum, Map, … But, there are other data types that many of your iOS apps are likely to use. As an example, if you’re using Core Graphics, then it’s hard…

Today, we are excited to announce the public preview of our next version of Realm Sync: Flexible Sync. This new method of syncing puts the power into the hands of the developer. Now, developers can get more granular control over the data synced to user applications with intuitive language-native queries…

Introduction I’m not a fan of writing code using pseudo-English text strings. It’s a major context switch when you’ve been writing “native” code. Compilers don’t detect errors in the strings, whether syntax errors or mismatched types, leaving you to learn of your mistakes when your app crashes. I spent more than…

How to get the most out of SwiftUI previews — even for views relying on data held in databases such as Realm or Core Data — Introduction Canvas previews are an in-your-face feature of SwiftUI. When you create a new view, half of the boilerplate code is for the preview. A third of your Xcode real estate is taken up by the preview. Despite the prominence of the feature, many developers simply delete the preview code from…

Introduction I’m all-in on using SwiftUI to build iOS apps. I find it so much simpler than wrangling with storyboards and UIKit. Unfortunately, there are still occasions when SwiftUI doesn’t let you do what you need-forcing you to break out into UIKit. That’s why I always focus on Apple’s SwiftUI enhancements…

Introduction When building a mobile app, there’s a good chance that you want it to pull in data from a cloud service-whether from your own or from a third party. While other technologies are growing (e.g., GraphQL and MongoDB Realm Sync), REST APIs are still prevalent. It’s easy to make a…

Introduction In the previous post in this series, we saw how to migrate your Realm data when you upgraded your iOS app with a new schema. But, that only handled the data in your local, standalone Realm database. What if you’re using MongoDB Realm Sync to replicate your local Realm data…

Introduction Murphy’s law dictates that as soon as your mobile app goes live, you’ll receive a request to add a new feature. Then another. Then another. This is fine if these features don’t require any changes to your data schema. But, that isn’t always the case. Fortunately, Realm has built-in functionality…