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iOS Build a Playlist Browser with Swift Building the Music Library and Playlist Models Struct Initialization

Posted by pixelation
pixelation
Courses Plus Student 4,219 Points

Still getting tons of errors in the init method, can't fix it?

I am using XCode 6.4 and I added the code that's in the video:

let musicLibrary = MusicModel().library let playlistDictionary = musicLibrary[index] title = playlistDictionary["title"] as String!

That didn't work, I checked the other questions and everyone said to change AS to AS! , so I did this:

let musicLibrary = MusicModel().library let playlistDictionary = musicLibrary[index] title = playlistDictionary["title"] as! String!

That gave me this error: Cannot assign a value of type ‘String!’ to a value of type ‘String?’

as well as this warning on the playlistDictionary line: Constant ‘playlistDictionary’ inferred to have type ‘AnyObject?’, which may be unexpected

I've tried all of the suggestions and can't get this to work. Would be great if someone from Treehouse could updated this code being that I'm paying a monthly fee for this.

1 Answer

Michael Kannard
Michael Kannard
2,555 Points
Michael Kannard
Michael Kannard
2,555 Points

When you change the "as" to an "as!", you need to take the ! operator off of the type that you are casting to. Ex: let musicLibrary = MusicModel().library let playlistDictionary = musicLibrary[index] title = playlistDictionary["title"] as! String

However the best way to do this now is actually using "as?", which will not trigger a runtime error if the value you are accessing is nil.

let musicLibrary = MusicModel().library let playlistDictionary = musicLibrary[index] title = playlistDictionary["title"] as? String