return Coredat - Swift

Question

I am unable to assign a textField with the result of a search when it is int, with the right string

 var results:NSArray =  try context.executeFetchRequest(request) as! [NSManagedObject]

        if(results.count > 0){
            var res = results[0] as! NSManagedObject

            nomeText.text = res.valueForKey("nome") as? String
            idadeText.text = res.valueForKey("idade") as? String
               print(res.valueForKey("idade") as? String)
            }

In the print it returns me nil.. when it changes to Int, it returns me correct value.. how do I assign the textField with this value, remembering that with the field name I do not have this error

Answer 1

The syntax "as?" returns nil if it cannot cast, and in this case the value is of type Int, then the correct one would be like this:

res.valueForKey("idade") as? Int

But, you should take advantage of the type of objects that Coredata offers you.

Just enter the xcdatamodel file, select its entities, and through the top menu Editor -> Create Nsmanagedobject subclass

So your code would be much simpler:

var results =  try context.executeFetchRequest(request) as! [Pessoa]

if(results.count > 0){
   var res = results[0]

   nomeText.text = res.nome
   idadeText.text = res.idade.description
}

Source: https://developer.apple.com/library/ios/recipes/xcode_help-core_data_modeling_tool/Articles/creating_mo_class.html

Answer 2

Coredata numerical values are mapped to NSNumber.

To assign as text to UITextField you must explicitly ask for the value as string:

let idade : NSNumber = res.valueForKey("idade")
idadeText.text =  idade.stringValue()