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! While you're at it, check out some resources Treehouse students have shared here.

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 Error Handling Throwing Errors

Posted by diegoarenas
diegoarenas
21,753 Points

From inside the body of the function, throw an error using the error object and single member provided.

Im not sure on what to do here

error.swift 
enum BookError: Error {
  case incorrectTitle
}

func lend() throws {

}

1 Answer

Christian Mangeng
Christian Mangeng
15,970 Points
Christian Mangeng
Christian Mangeng
15,970 Points

Hi diegoarenas,

you now need to throw the error you defined in the enum (consisting of the object BookError and the member incorrectTitle):

func lend() throws {
    throw BookError.incorrectTitle
}