Access static variable in extension in swift-ObjC [duplicate]

Question

Hi I have this extension for NSUserDefaults and I need to access it using Obj-C.

Struct in Extension

public struct UserDefaultsEntry {
    let key: String

    func get() -> AnyObject? {
        return NSUserDefaults.standardUserDefaults().objectForKey(key)
    }

    func set(value: AnyObject) {
        switch value {
        case is Bool:
            NSUserDefaults.standardUserDefaults().setBool(value as! Bool, forKey: key)
            break
        case is String:
            NSUserDefaults.standardUserDefaults().setObject(value as! String, forKey: key)
            break
        case is NSData:
            NSUserDefaults.standardUserDefaults().setObject(value as! NSData, forKey: key)
            break
        default:
            break
        }
    }

    func remove() {
        NSUserDefaults.standardUserDefaults().removeObjectForKey(key)
    }
}

Static Variable in same extension class

public static let testDefault = UserDefaultsEntry(key: "testDefault")

so I can call it normally in swift class by using

let string = "test"
NSUserDefaults.testDefault.set(string)

but failed to call it in Obj-C class. So how can I call it? Thanks in advance

EDIT: Tried to use

[NSUserDefaults.testDefault get];

but I'm getting

Property 'testDefault' not found on object type 'NSUserDefaults'

keithbhunter · Accepted Answer · 2016-04-19 12:15:11Z

2

Structs are not available in Objective-C. For code in Swift to be available in Objective-C, it must be a class that subclasses NSObject. testDefault is a struct, and therefore, can't be seen by Objective-C.

answered Apr 19, 2016 at 12:15

keithbhunter

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