Amir_P Amir_P - 1 year ago 260
iOS Question

Could not cast value of type '_SwiftValue' error

I'm trying to fill my arrays with datas in

that i get from server and I'm doing that with this code(swift 3 Xcode 8):

func parseReservationJson(_ anyObject:Array<AnyObject>){
for anyObj in anyObject{
let client_name = (anyObj["client_name"] as? String) ?? ""
let client_family = (anyObj["client_family"] as? String) ?? ""
let ft_of_time = ((anyObj["ft_of_time"] as AnyObject as! NSString).substring(to: 5) as NSString)

But I'm getting this error for the last line of
statement :

Could not cast value of type '_SwiftValue' (0x112d8a898) to 'NSString' (0x11003eab8).

I don't want to use dependency for converting JSON. what is wrong?

Answer Source

The error reason is that Swift 3 AnyObject? cannot be casted directly to Foundation NSString.

You could write

let ft_of_time = ((anyObj["ft_of_time"] as! String as NSString).substring(to: 5) as NSString)

But I recommend to replace the entire line with

let ftOfTime = anyObj["ft_of_time"] as! String
let ft_of_time = ftOfTime.substring(to:ftOfTime.index(ftOfTime.startIndex, offsetBy: 5)) as NSString

It does the same but it uses native Swift API. Except the final cast to NSString (if needed at all) there is no type casting back and forth.

Recommended from our users: Dynamic Network Monitoring from WhatsUp Gold from IPSwitch. Free Download