Could not cast value of type 'Swift.Array' to 'Swift.AnyHashable'

Asked Jul 10 '18 at 11:18

Active Jul 10 '18 at 11:50

Viewed 173 times

I am trying to cast my strings to AnyHashable but getting crashed.

I am using as below

let castArray = [string1,string2] as! AnyHashable
Myclass?.functionName!(forAction: actionMethod, forData: [
        castArray:string3,
        ])

It is throwing error as:

Could not cast value of type 'Swift.Array<Swift.String>'  to 'Swift.AnyHashable' and crashing.

String1 and String2 and String3 are the static strings.

Any idea why it is crashing ?

edited Jul 10 '18 at 11:50

asked Jul 10 '18 at 11:18

Steve Gear

Array does not support `Hashable`. – Jeffery Thomas Jul 10 '18 at 11:24
Then how can i change to access casting – Steve Gear Jul 10 '18 at 11:25
Look at https://stackoverflow.com/questions/31438210/how-to-implement-the-hashable-protocol-in-swift-for-an-int-array-a-custom-strin – Jeffery Thomas Jul 10 '18 at 11:26
@JefferyThomas OP is casting to `AnyHashable`, not `Hashable` actually. Currently it is unclear what he is trying to do. – Papershine Jul 10 '18 at 11:26
Yes. I am casting to AnyHashable not Hashable. Array is accepting to cast AnyHashable but it is crashing – Steve Gear Jul 10 '18 at 11:28
@paper1111 i want to pass data as castArray:string3 so i am casting that array because string3 also string – Steve Gear Jul 10 '18 at 11:35
@paper1111 I have update my question. Can you check and suggest for any other way – Steve Gear Jul 10 '18 at 11:52
Because Array does not conform to Hashable it cannot be cast to AnyHashable. – Jeffery Thomas Jul 10 '18 at 15:08
@JefferyThomas Please suggest how can i proceed for my code let castArray = [string1,string2] as! AnyHashable Myclass?.functionName!(forAction: actionMethod, forData: [ castArray:string3, ]) – Steve Gear Jul 10 '18 at 15:57
If you want `[string1,string2] as! AnyHashable` to work, you need to make `Array` conform to `Hashable`. See the answer I linked earlier. – Jeffery Thomas Jul 10 '18 at 16:15
The sort answer for Swift 4.1: `extension Array: Hashable where Element: Hashable { public var hashValue: Int { return self.reduce(5381) { ($0 << 5) &+ $0 &+ $1.hashValue } } }` – Jeffery Thomas Jul 10 '18 at 16:16

Could not cast value of type 'Swift.Array' to 'Swift.AnyHashable'

0 Answers0