I need to see a sample code in order for me to understand. I am learning about NSDocuments, having created the starting template from Xcode. My Document consists of an Integer and the storyboard has a field to display and a button to increment the value. I need to learn how to store and read my Document data, a single Integer. This is what Xcode gives me:
var myData: Int = 0 //my Document's Data.
override func data(ofType typeName: String) throws -> Data {
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}
override func read(from data: Data, ofType typeName: String) throws {
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}
ive tied a few guesses but am completely lost; help me please.
A simple example for your simple data:
override func data(ofType typeName: String) throws -> Data {
return String(myData).data(using: .utf8) ?? Data()
}
override func read(from data: Data, ofType typeName: String) throws {
self.myData = Int(String(data: data, encoding: .utf8) ?? "") ?? 0
}You create a Data which contains all the info of your Document in `data(ofType:)`,
And you retrieve all the info of your Document from the data in `read(from:ofType:)`.
In usual document-based app, a Document would not have multiple types and you can ignore typeName.
