Expose Swift Array Of Enums in Objective-C - objective-c

Question

I have this enum in swift
#objc(PaymentMethods)
public enum PaymentMethods: Int, RawRepresentable {
public typealias RawValue = String
case card
case account
case paypal
public var rawValue: RawValue {
switch self {
case .card:
return "CARD"
case .account:
return "ACCOUNT"
case .paypal:
return "PAYPAL"
}
}
public init(rawValue: RawValue){
switch rawValue {
case "CARD":
self = .card
case "ACCOUNT":
self = .account
case "PAYPAL":
self = .paypal
default:
self = .card
}
}
}
And this property in a class.
#objc public class SomeClass: ExtendingSomeOtherStuffs {
var supportedPaymentMethods:[PaymentMethods]!
}
my problem is how to bridge supportedPaymentMethods into Objective-C and use it.
I have looked at this post and this but still can't figure it out.
can someone help me out with an example at least.
Am trying to use this in Native-script and I need to expose that property from Swift to Objective

Answer 1

You can do it like so:
#objc public class SomeClass: NSObject {
var supportedPaymentMethods: [PaymentMethods]
#objc init(supportedPaymentMethods: [String]) {
self.supportedPaymentMethods = supportedPaymentMethods.map { .init(rawValue: $0) }
}
}
and use it like this in your Objective-C code:
[[SomeClass alloc] initWithSupportedPaymentMethods:#[#"ACCOUNT", #"CARD", #"PAYPAL"]];
If you don't want your class initializer to take any String I would suggest doing the following:
Make your init(rawValue:) failable and return nil when the argument is invalid:
public init?(rawValue: RawValue) {
switch rawValue {
case "CARD":
self = .card
case "ACCOUNT":
self = .account
case "PAYPAL":
self = .paypal
default:
return nil
}
}
Use compactMap instead of map in the init of the SomeClass like so:
#objc init(supportedPaymentMethods: [String]) {
self.supportedPaymentMethods = supportedPaymentMethods.compactMap { .init(rawValue: $0) }
}
(it will eliminate the nil values)