Structure of the objects is not known at compile time, but instead they areĬreated at runtime. To review how other languages handle JSON.Ĭ# offers an approach which uses dynamic objects. Other approachesīefore diving into the problem from a Swift point of view, let’s take a moment ‘best-case’ scenario, but becomes increasingly difficult when attempting to cope model objects which don’t have all requiredĪs you’ll see, satisfying these requirements is not too difficult in a Our parser should leverage the type-safety that underlies Swift, and also preventĬreation of invalid objects - i.e. It is the next step - translating these Foundation types into Layer within your application, it translates the JSON into the generic types Since the NSJSONSerialization class has no knowledge of the specific model The JSON should be converted to inside the application. The concept of a model layer - that is a selection of objects used to model theĭata structure that your application acts upon. JSON is a great serialization technology due to its simple specification, andĪccessibility to both humans and machines. The code works at the time of writing, using Note: Swift is undergoing a huge amount of development, as are the You will probably have to build each of the frameworks in order The dependencies are managed by Carthage, but are checked in to ensureĬompatibility. This is available to download from GitHub at How close they come to our ideal scenario.Īccompanying this article you’ll find an Xcode workspace containing several Up in the last few months, explaining their underlying concepts and reviewing Then we’ll consider two new frameworks that have popped NSDictionary, NSNumber etc, but the structure is dependent on the schema ofįirst of all we’ll take a look at what we’d actually like from a JSON parser, inĪn ideal world, before reviewing the naïve approaches you’d expect as a seasoned
What can weĭo with this? We know it’s made up of Foundation objects such as NSArray,
JSONObjectWithData(_:, options:, error:) is an AnyObject? blob. The interesting question is what happens at Parsing in Swift, covering some of the most popular new libraries.Īll approaches rely on Cocoa’s NSJSONSerialization class to handle the JSON
This article is a pragmatic review of the current options available for JSON Implement the network data layer of our app. We don’t necessarily want to have to learn a whole new programming paradigm to This is great, and I recommend you read them, but They mainly focus on the theory behind using the functional aspects of the new There have been some truly excellent blog posts about using JSON with Swift, but Maybe it’sĪ rite of passage to becoming a Swift blogger? Anyway, it seems like a good time In the world of Swift blogging, JSON parsing seems to be a ‘hot topic’.
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