Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Error Handling in Swift 2.0 Error Handling Handling Errors

need help handling errors

i guess i missed something, but i have no idea how to go about this. ive been going back in the videos and trying to figure it out, but i cant.

enum ParserError: ErrorType {
  case EmptyDictionary
  case InvalidKey

struct Parser {
  var data: [String : String?]?

  func parse() throws {

      if data == nil {
          do {
      guard let key = data["someKey": nil] else {
        throw ParserError.InvalidKey


let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)

1 Answer

Steven Deutsch
Steven Deutsch
21,046 Points

Hey Todd Stacy,

There are quite a few ways to solve this problem. You can take a look at a previous response of mine. Maybe you will find it of some use.


Good Luck

it helped a lot! thank you so much!