ios - Xcode 7.0 update issue with Swift 2 -

i faced issue project written in swift, when updated xcode latest version; xcode 7.0.

xcode told me should convert code work swift's new syntax (swift 2).

the problem not understand how solve line of codes.

as example: i'm using swiftyjson in application , xcode gives me error see below:

public struct json {      public init(data:nsdata, options opt: nsjsonreadingoptions = .allowfragments, error: nserrorpointer = nil) {         if let object: anyobject = nsjsonserialization.jsonobjectwithdata(data, options: opt, error: error) {             self.init(object)         } else {             self.init(nsnull())         }     } 

some functions dropped arguments , in case error pointer. instead throws (which means can call try catch handling). here swift 2.0 version of code

public struct json  {      public init(data:nsdata, options opt: nsjsonreadingoptions = .allowfragments, error: nserrorpointer = nil)      {         {             let object:anyobject = try nsjsonserialization.jsonobjectwithdata(data, options: opt)             self.init(data: object as! nsdata)         } catch {             //error handling code         }     } }