SetValueForKeys not working Swift
I have the following code in a playground:
class Pokemon : NSObject {
var name :String!
var id :Int?
var imageURL :String!
var latitude :Double!
var longitude :Double!
init(dictionary :[String:Any]) {
super.init()
setValuesForKeys(dictionary)
}
}
let dict :[String:Any] = ["name":"John","imageURL":"someimageURL","latitude":45.67]
let pokemon = Pokemon(dictionary: dict)
When setValuesForKeys is called, it will throw an exception saying the following:
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__lldb_expr_13.Pokemon 0x6000000ffd00> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key latitude.'
I have the key "latitude", but for some reason it cannot find it. Any ideas!
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1 answer
The type Double!
(likewise Double?
) has no match in the Objective-C world, so it doesn't appear as an Objective-C property , so Key-Value Coding cannot find a key named "latitude" and fails.
You have to convert these fields to non-optional if you want KVC.
class Pokemon : NSObject {
var name: String!
var id: Int = 0
var imageURL: String!
var latitude: Double = 0.0
var longitude: Double = 0.0
init(dictionary: [String: Any]) {
super.init()
setValuesForKeys(dictionary)
}
}
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