CODEWITHSUNDEEP
iosswiftswift3xcode8anyobject
Parth Adroja
Parth Adroja

Reputation: 13514

Exception generated while accessing value from AnyObject

This kind of error is generated

[_SwiftValue objectForKey:]: unrecognized selector sent to instance 0x600000a805a0

When I run the below code

 let obvj = object as AnyObject
 print(obvj)
 let ct = obvj.object(forKey: "currenttime") as! Date

Here value of object is

Optional({
    currenttime = "2016-10-14 11:30:12 +0000";
    endtime = "2016-10-14 14:30:12 +0000";
    success = 1;
})

While this was working fine in Swift 2.2

Upvotes: 0

Views: 115

Answers (2)

Zion
Zion

Reputation: 1566

You stated that the object variable is a dictionary type. I could be wrong, but I believe your syntax for a dictionary object is not correct. A dictionary should take the format: [key 1: value 1, key 2: value 2, key 3: value 3].

Here is the code I ran successfully in a playground:

//: Playground
import Foundation

let object = Optional([
    "currenttime" :  "2016-10-14T11:30:12+00:00",
    "endtime" : "2016-10-14T14:30:12+00:00",
    "success" : 1
])

let obvj = object as AnyObject?
print(obvj) // prints the dictionary object
let ct = obvj!.object(forKey: "currenttime") as! String
print(ct) // prints: 2016-10-14T11:30:12+00:00

// https://developer.apple.com/reference/foundation/dateformatter    
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)

let date = dateFormatter.date(from: ct)
print(date?.description) // prints: Optional("2016-10-14 11:30:12+0000")

The object var is initialized as an optional dictionary type.

The line that you have here: let obvj = object as AnyObject should be let obvj = object as AnyObject?. object should be cast as an optional AnyObject because it started as an optional dictionary type.

I'm not sure how your string as Date is working. It did not work for me. Maybe you added an extension to Date in your code? In my code above, I used a DateFormatter from the standard library and slightly modified the date string to fit the expected format. I followed the sample from the developer reference "Working With Fixed Format Date Representations" found here:

https://developer.apple.com/reference/foundation/dateformatter

Upvotes: 0

Nirav D
Nirav D

Reputation: 72410

Error is saying that your object is type of _SwiftValue and you cannot access Objective C method with it, to solve your problem cast your object as [String: Any] and use subscript instead of object(forKey:).

if let obvj = object as? [String: Any] {
    if let ct = obvj["currenttime"] as? Date

    }
}

Upvotes: 1

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