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iOS Swift 2.0 Enumerations and Optionals Introduction to Optionals Nil Values in Collections

Posted by Elijah Florence
Elijah Florence
Courses Plus Student 3,225 Points

Why does it keep giving me this error?

I have copied the syntax exactly from the video, why am I getting this error // swift_lint.swift:5:45: error: initializer for conditional binding must have Optional type, not '[String]' if let aMovie = movieDictionary["Spectre"], let aGroup = ["cast"], let anActor = ["Daniel Craig"] //

optionals.swift 
let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LÊa Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]

if let aMovie = movieDictionary["Spectre"], let aGroup = ["cast"], let anActor = ["Daniel Craig"]
{
var leadActor = anActor
}

1 Answer

Cindy Lea
PLUS
Cindy Lea
Courses Plus Student 6,497 Points
Cindy Lea
Cindy Lea
Courses Plus Student 6,497 Points

The if conditions need to be broken down differently:

let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LÊa Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]

if let movie = movieDictionary["Spectre"] { if let cast = movie["cast"] { leadActor = cast[0] } }