CODEWITHSUNDEEP
swiftcloudkitoverloading
BlackHatSamurai
BlackHatSamurai

Reputation: 23483

Overloading Method in Swift Gives Objective C error

I'm trying to extend the CKRecord class to allow subscripting. To do so, I've created a new file, called CKRecordHelper, and done:

extension CKRecord {
    subscript(key: String) -> AnyObject! {
        get {
            return self.objectForKey(key)
        }
        set(newValue) {
            self.setObject(newValue as? CKRecordValue, forKey: key)
        }
    }
}

However, I'm getting an error on the get and set lines, which reads:

Subscript getting with Objective-C selector 'objectoForKeyedSubscript:' conflicts with method 'objectForKeyedSubscript' with the same Objective-C selector.

How do I fix this? From what I understand, Objective-C doesn't allow method overloading, but I'm using Swift. Ultimately, I'm just looking to allow a CKRecord to allow subscripting on it.

Upvotes: 0

Views: 52

Answers (1)

Bryan Chen
Bryan Chen

Reputation: 46598

Use @nonobjc attribute to hide the method from ObjC runtime so Swift compiler doesn't need to worry about compatibility with ObjC code.

extension CKRecord {
    @nonobjc subscript(key: String) -> AnyObject! {
        get {
            return self.objectForKey(key)
        }
        set(newValue) {
            self.setObject(newValue as? CKRecordValue, forKey: key)
        }
    }
}

Upvotes: 2

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