So what if you want to share data between your apps? Then what? App GroupsĪpp group is a fancy Apple way of saying ‘shared folder’. All the files you save on the file system within your app are all being saved somewhere in the app container. In your app container you have your documents directory, your caches directory, you would save your database there, etc. Your app will get a unique identifier that is different for each device and that unique identifier will be a part of the path to your container (just in case you were thinking you can count on the location of the container to remain fixed across devices). Your application container is a special kind of folder created when your app is installed on a device. When I hear a word ‘container’ I immediately think of a word ‘folder’ and that’s exactly what it is. We’ll be using this file in our examples.
This is a simple plist file with a list of all the system resources your app requested. You’ve probably seen a file in your project with the extension ‘entitlements’. If your app starts doing damage, for what ever reason, it will only do damage in the sandbox. Sandboxing is there to protect the system and to protect the user. Sandboxing is baked deep into the system and its main reason for existence is that your app can’t go gun-ho crazy and do a lot of damage. The same goes for access to the users’ data, like photos. For example, if you need hardware resources, like camera, your app needs to ask for it. iOS is built on top of Unix and is using advanced user control on the kernel level to restrict access to your app. Just so we’re all clear, when we say an app is sandboxed, we mean that the access to it is restricted by the system.
Let’s go… Sandboxes, Entitlements and ContainersĪs an iOS developer you already know that iOS apps are sandboxed. Last week, I wrote about monitoring files on the file system, this library will build on top of DAFileMonitor that I developed for that post.
SWIFT SHARE CORE DATA WITH EXTENSION HOW TO
In this post we’ll see how to share data between two apps and we’ll even build a small library that will make sharing of data extremely simple. If you ever needed to share data between your iOS apps and/or your application targets, there’s a very easy way to do this using app groups.
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