Swift 2 - NSJSONSerialization.JSONObjectWithData Handling Error [duplicate] - ios

Question

This question already has answers here:
Correct handling of NSJSONSerialization (try catch) in Swift (2.0)?
(3 answers)
Closed 6 years ago.
I have a JSONParser, but unfortunately I couldn't adapt NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &error) bit to Swift 2.0, so I am receiving error:
Extra argument 'error' in call
I found out that I can achieve this with do-try-catch, but I couldn't figure out how to adapt it in my case. Whatever I tried is just throwing another error.
class JSONParser {
let json: AnyObject?
var error: NSError?
init(data: NSData){ // ~this chunk~
self.json = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &error)
}
func array()->NSArray?{
if let jsonResponse: AnyObject = self.json{
return jsonResponse as? NSArray
}
return nil
}
func dictionary()->NSDictionary?{
if let jsonResponse: AnyObject = self.json{
return jsonResponse as? NSDictionary
}
return nil
}
}

Answer 1

swift3
NSJSONSerialization and its methods are modified, according to the Swift Documents.
do {
let JsonDict = try JSONSerialization.jsonObject(with: data, options: [])
// you can now use t with the right type
if let dictFromJSON = JsonDict as? [String:String]
{
// use dictFromJSON
}
} catch let error as NSError {
print(error)
}
Swift2
init(data: NSData){ // ~this chunk~
do {
self.json = try NSJSONSerialization.JSONObjectWithData(data, options: []) as! [String:AnyObject]
} catch {
print("error: \(error)")
self.json = nil
}
}
for more information tutorial1, tutorial2

Answer 2

var dataSource = [AnyObject]()
do { self.dataSource = try NSJSONSerialization.JSONObjectWithData(responseData, options: NSJSONReadingOptions.MutableLeaves) as! [AnyObject]
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
if self.dataSource.count != 0 {
dispatch_async(dispatch_get_main_queue()) {
self.sampleTableView.reloadData()
}
}