Swift 2 iOS 9 Do Catch Try crashing with unexpected nil found

Question

I\'m trying to become familiar with the new do catch statements with swift 2 and iOS 9

My problem is that when an error occurs with NSURLSession, the da

Answer 1

This is because catch only catches what a functions "throws".

NSJSONSerialization throws, but force unwrapping an empty Optional doesn't, it always crashes.

Use if let or the new guard function to safely unwrap your values.

do {
    if let myData = data, let jsonResult = try NSJSONSerialization.JSONObjectWithData(myData, options: []) as? NSDictionary {
        print(jsonResult)
    }
} catch {
    print(error)
}