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iOS Error Handling in Swift Error Handling Handling Errors

Posted by Noe Arzate
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Noe Arzate
Python Web Development Techdegree Student 6,077 Points

Try-Catch block code challenge

I need assitance in calling the parse() method in the try-catch block and printing a message. I've tried in xcode and I keep getting error message - "use of unresolved identifier 'parse'.

Any assistance would be greatly appreciated.

error.swift 
enum ParserError: Error {
  case emptyDictionary
  case invalidKey
}

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

  func parse() throws {
      guard let data = data else {
        throw ParserError.emptyDictionary
      }

      guard let someKey = data["someKey"] else {
        throw ParserError.invalidKey
      }
  }
}

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

do {

} catch {
  print("invalid")
}