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This below class
class User: NSManagedObject { @NSManaged var id: Int @NSManaged var name: String } Needs to be converted to
{ "id" : 98, "name" : "Jon Doe" } I tried manually passing the object to a function which sets the variables into a dictionary and returns the dictionary. But I would want a better way to accomplish this.
911
Swift version: 5.6. If you want to parse JSON by hand rather than using Codable , iOS has a built-in alternative called JSONSerialization and it can convert a JSON string into a collection of dictionaries, arrays, strings and numbers in just a few lines of code.
JSON is a format that encodes objects in a string. Serialization means to convert an object into that string, and deserialization is its inverse operation (convert string -> object). If you serialize this result it will generate a text with the structure and the record returned.
SwiftyJSON is a library that helps to read and process JSON data from an API/Server. So why use SwiftyJSON? Swift by nature is strict about data types and wants the user to explicitly declare it. This becomes a problem as JSON data is usually implicit about data types.
JSON parsing in Swift is a common thing to do. Almost every app decodes JSON to show data in a visualized way. Parsing JSON is definitely one of the basics you should learn as an iOS developer. Decoding JSON in Swift is quite easy and does not require any external dependencies.
In Swift 4, you can inherit from the Codable type.
struct Dog: Codable { var name: String var owner: String } // Encode let dog = Dog(name: "Rex", owner: "Etgar") let jsonEncoder = JSONEncoder() let jsonData = try jsonEncoder.encode(dog) let json = String(data: jsonData, encoding: String.Encoding.utf16) // Decode let jsonDecoder = JSONDecoder() let secondDog = try jsonDecoder.decode(Dog.self, from: jsonData) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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