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 Build a Simple iPhone App with Swift Creating a Data Model Finishing Up Our Model

Lucy Jeong
Lucy Jeong
7,243 Points
Posted by Lucy Jeong
Lucy Jeong
7,243 Points

I have a breakpoint randomFact()

func randomFact() -> String {

    let unsignedArrayCount = UInt32(factsArray.count)
    let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
    let randomNumber = Int(unsignedRandomNumber)

        return factsArray[randomNumber]
        }

I did following this video. But my app don't work

a breakpoint is

let unsignedArrayCount = UInt32(factsArray.count)

what is the reason of the problem??