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Im currently working throught the App Development with Swift Xcode 10 book from Apple and I have come to the last guided project 'Restaurant App'. Hopefully there are those of you already familiar with the guided app project and can help, and for those not familiar most all the reference code is found in the book chapter 5.6. My guess is I'm not the first to have this problem, but can't find the exact solution. Up to this point I've been able to complete all the lab's and projects to working order and not needed any help from the forums. Everything worked perfectly on this app till it came time to "Submit" the order and call the func submitOrder from the MenuController.swift in where the func will encode the data then set the prepartationTime.prepTime in completion. This issue arises here, I have followed the code line by line and verified there is indeed data. But when trying to unwrap the data and decode it, it returns nil data.Currently I'm using Xcode 11.5 and Swift 5.2.Print view output when pressing submit button. - Call from Order Table to submit the orderOrderTableViewController uploadOrder() menuIDs = [4]- print data from the submitOrder()data = ["menuIds": [4]]jsonData = 15 bytesrequest.httpbody = 15 bytesSubmit Order Failed func submitOrder(forMenuIDs menuIds: [Int], completion: @escaping (Int?) -> Void) { let orderURL = baseURL.appendingPathComponent("order") var request = URLRequest(url: orderURL) request.httpMethod = "POST" request.setValue("application/json", forHTTPHeaderField: "Content-Type") let data: [String: [Int]] = ["menuIds": menuIds] let jsonEncoder = JSONEncoder() let jsonData = try? jsonEncoder.encode(data) request.httpBody = jsonData let task = URLSession.shared.dataTask(with: request) { (data, response, error) in let jsonDecoder = JSONDecoder() if let data = data, let preparationTime = try? jsonDecoder.decode(PreparationTime.self, from: data) { print(preparationTime) completion(preparationTime.prepTime) }else { print("Submit Order Failed") completion(nil) } } task.resume() }

Maybe not the best place to post this comment, but I'm looking for insight...I've been coding off and on for about 20 years now, so I know the basics pretty well. Back when I started coding in 2000 I began with Assembly Language, if anyone can remember that. Over the last few years I've tried to get to know Objective-C but never well enough to put an app on the app store. Now I have dove into the App Development with Swift book with full commitment and I'm more half way through it. But I'm getting a bit nervous or lost on how to put this all together. I do the challenge apps, all the Lab Playgrounds and understand how the app works (for the most part), but then I begin to wonder how to put this knowledge all together into an app, how to know when to use what. Is there a path to coding in Swift with confidence? So to speak... Or a point I realize that it comes together.Did most new programmers start this way? Or is it just me?