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iOS Build a Weather App with Swift (Retired) Concurrency Using Our JSON Data

David Petrin
David Petrin
3,384 Points
Posted by David Petrin
David Petrin
3,384 Points

Downcasting in Xcode V6.3

I just updated to Xcode 6.3 and my code now shows an error at: let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as NSDictionary

I believe it suggests revising the line of code to: let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as! NSDictionary

Is this correct?

3 Answers

Joel Lopez
Joel Lopez
3,191 Points
Joel Lopez
Joel Lopez
3,191 Points

Iam getting the same in but on the previous app (Playlist, algorhythm): description = playlistDictionary["description"] as String!

it wants to replace the as to as! to force downcast description = playlistDictionary["description"] as! String!

Jeanne Merle
Jeanne Merle
3,390 Points
Jeanne Merle
Jeanne Merle
3,390 Points

Good Point David ! I had no idea what was the new method.

Michael Metzger
Michael Metzger
4,529 Points
Michael Metzger
Michael Metzger
4,529 Points

HI Guys. I have Xcode 6.3 too. I found that you also have to unwrap the contents of dataObject. 

            <p>let dataObject = NSData(contentsOfURL: location!)
            let weatherDicitonary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as! NSDictionary</p>
            ```