CloudKit: How to query a record from a Container's Public Database Using NSPredicate (Swift)

ios-cloudkit-swift-query

        //get the container for the App
        let defaultContainer: CKContainer = CKContainer.defaultContainer()
        
        //get the PublicDatabase inside the Container
        let publicDatabase: CKDatabase = defaultContainer.publicCloudDatabase
        
        //predicate for query
        let predicateForAddress = NSPredicate(format: "address = '123 Beggers Canyon, Tatooine'", argumentArray: nil)
        
        //create query
        let query = CKQuery(recordType: "POI", predicate: predicateForAddress)
        
        //execute query
        publicDatabase.performQuery(query, inZoneWithID: nil) { (resultsArray, queryError) -> Void in
            
            if queryError != nil {
                
                println("Uh oh, there was an error querying ...")
                println(queryError.localizedDescription)
            }
            
            if resultsArray != nil {
                
                for result in resultsArray {
                    
                    let record: CKRecord = result as CKRecord
                    println(record.objectForKey("title"))
                    println(record.objectForKey("description"))
                    println(record.objectForKey("address"))
                    println(record.objectForKey("location"))
                }
            }
        }