將PFObject上的空值轉換為cellForRowAtIndexPath中的子類

Question

我在將PFObject強制轉換為名為“ Customer”的自定義類時遇到問題

這是班上的快捷文件

    @objc class Customer: PFObject, PFSubclassing  {

    @NSManaged var CompanyName: String
    @NSManaged var City: String
    @NSManaged var CountryCode: String
    @NSManaged var Address: String
    @NSManaged var Prov: String
    @NSManaged var Email: String
    @NSManaged var Vat: String
    @NSManaged var PaymentDelay: String
    @NSManaged var ficId: String
    @NSManaged var owner: Owner


    override class func initialize() {

        struct Static {
            static var onceToken : dispatch_once_t = 0;
        }

        dispatch_once(&Static.onceToken){
            self.registerSubclass()
        }

    }

    static func parseClassName() -> String {
        return "Customer"
    }   
}

這是tableViewDelegate

@objc class CustomersViewController: PFQueryTableViewController {

    override func queryForTable() -> PFQuery {

        let query = PFQuery(className: "Customers")
        query.orderByAscending("CompanyName")
        query.includeKey("owner")

        return query
    }

    override func objectsDidLoad(error: NSError?) {
        super.objectsDidLoad(error)
        //print("\(objects?.count) customers")
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell? {

        let cell = cellForTableView(tableView)
        print("obj:\(object?.objectId)")

        if let customer = object as? Customer {
            print("customer")
            let customerLabel = cell.viewWithTag(101) as! UILabel
            customerLabel.text = customer.CompanyName
        }

        return cell;
    }

    func cellForTableView(tableView: UITableView) -> PFTableViewCell{

        let cellIdentifier = "CustomerCell"

        if let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as? PFTableViewCell{
            return cell
        } else {
            return PFTableViewCell(style: .Subtitle, reuseIdentifier: cellIdentifier)
        }
    }
}

問題是該代碼從未執行過……為什么？

if let customer = object as? Customer {
                print("customer")
                let customerLabel = cell.viewWithTag(101) as! UILabel
                customerLabel.text = customer.CompanyName
            }

這是我的錯誤還是PFSubclassing協議的錯誤？

日志顯示該對象已正確下載..這是包裝問題嗎？

obj：Optional（“ uZ1v4VTFnt”）obj：Optional（“ ciCOtYFMif”）obj：Optional（“ P43mV63o0l”）obj：Optional（“ YhMWMkklwZ”）obj：Optional（“ LtKxwHApKZ”）obj：Optional（“ EXL5tEW9EI”）obj：可選（“ I9HoCWqYub”）

謝謝

Answer 1

看看類名不匹配

static func parseClassName() -> String {
    return "Customer"
}

let query = PFQuery(className: "Customers")

在查詢中，您正在使用類名Customer，而在解析類名時您將返回Customer

另外，正如我在評論中提到的那樣，您必須在應用程序委托中初始化解析對象