While writing a pet project app in Swift I put together this convenience function that simplifies converting an NSData into JSON objects via the NSJSONSerialization class. My JSONObjectWithData function adds a Swift-friendly API on top of the Foundation method of the same name. Here is a Gist showing how it works and how to use it.
| import Foundation | |
| /** Outputs of the JSONObjectWithData function. */ | |
| enum JSONObjectWithDataResult | |
| { | |
| case Success(AnyObject) | |
| case Failure(NSError) | |
| } | |
| /** | |
| Attempts to convert the specified NSData to JSON objects | |
| and returns either the root JSON object or an error. | |
| */ | |
| func JSONObjectWithData( | |
| data: NSData, | |
| options: NSJSONReadingOptions = nil) | |
| -> JSONObjectWithDataResult | |
| { | |
| var error: NSError? | |
| let json: AnyObject? = | |
| NSJSONSerialization.JSONObjectWithData( | |
| data, | |
| options: options, | |
| error: &error) | |
| return json != nil | |
| ? .Success(json!) | |
| : .Failure(error ?? NSError()) | |
| } | |
| // | |
| // Example usage | |
| // | |
| func readSomeJSON() | |
| { | |
| // Get JSON data somewhere… | |
| let data = NSData() | |
| switch JSONObjectWithData(data) | |
| { | |
| case .Success(let json): println("json: \(json)") | |
| case .Failure(let error): println("error: \(error)") | |
| } | |
| } |
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