SLManager.swift

public static func setSpotLightIndexes(){
    let items = DAOItem.sharedInstance.fetchItems()
    var searchableItems = [CSSearchableItem]()

    // deletando todos os itens
    CSSearchableIndex.default().deleteAllSearchableItems { (error) in
        guard error == nil else {
            print(error!.localizedDescription)
            return
        }
    }
        
    // criando todos os itens
    for item in items {
        let attributeSet = CSSearchableItemAttributeSet(itemContentType: kUTTypeItem as String)
        attributeSet.keywords = ["Groceries", "Grocery", "List", "Ericow"]
        attributeSet.title = item.name
        attributeSet.contentDescription = item.isDone ? "\(item.name!) was bought" : "\(item.name!) wasn't bought"
        attributeSet.thumbnailData = item.isDone ? UIImagePNGRepresentation(UIImage(named: "Check")!) : UIImagePNGRepresentation(UIImage(named:"Uncheck")!)

        searchableItems.append(CSSearchableItem(uniqueIdentifier: item.name!, domainIdentifier: nil, attributeSet: attributeSet))
    }
        
    // adicionando todos os itens
    CSSearchableIndex.default().indexSearchableItems(searchableItems) { (error) in
        guard error == nil else {
            print(error!.localizedDescription)
            return
        }
    }
}