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

Posted by Apoorv Pal
Apoorv Pal
4,130 Points

I am getting an error while executing my code

I wrote this - 

let dataObject = NSData(contentsOfURL: location)
let weatherDictionary: NSDictionary = NSJSONSerialization.dataWithJSONObject(dataObject, options:nil, error: nil) as NSDictionary

and getting error -

Type NSdata? does not conform to protocol 'AnyObject'

2 Answers

Blend88 Web Studios
Blend88 Web Studios
8,056 Points
Blend88 Web Studios
Blend88 Web Studios
8,056 Points

I think you need to use NSJSONSerialization.JSONObjectWithData() and not NSJSONSerialization.dataWithJSONObject()

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points 
NSData(contentsOfURL: location)

returns an NSData optional.

however, dataWithJSONObject most likely expects a regular, non optional NSData object as its first argument

try force unwrapping the NSData object by placing a ! (bang) after the dataObject argument in the call to dataWithJSONObject

let dataObject = NSData(contentsOfURL: location)
let weatherDictionary: NSDictionary = NSJSONSerialization.dataWithJSONObject(dataObject!, options:nil, error: nil) as NSDictionary