我想在单击表格行时转到多个视图控制器。 所以我制作了如下代码。
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
var targetId = ""
var targetController: UITableViewController!
switch indexPath.row {
case 2:
targetId = "TableView1"
targetController = TableViewController1()
case 2:
targetId = "TableView2"
targetController = TableViewController2()
case 2:
targetId = "TableView3"
targetController = TableViewController3()
default:
return
}
let detailView = self.storyboard?.instantiateViewController(withIdentifier: targetId) as! targetController
self.navigationController?.pushViewController(detailView, animated: true)
}
但我可以看到错误消息“使用未声明的类型'targetController'”。 如何导航到多个视图控制器？
答案 0 :(得分：0)
您无法将对象强制转换为变量（实例）。
但是，如果所有控制器都是+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+
| s | p1 | o1 | p2 | o2 |
+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasValue | Nom |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:FirstName |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasDeliveryDate | ex:DjamelIdentityCardDeliveryDate |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasExpirationDate | ex:DjamelIdentityCardExpirationDate |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasNumber | ex:DjamelIdentityCardNumber |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:Djamel | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:Djamel | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasValue | Mon Adresse |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasValue | 19/06/1991 |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | ex:hasCCType | ex:DjamelCCType |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | ex:hasNumber | ex:DjamelCreditCardNumber |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:CreditCard |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasDeliveryDate | ex:DjamelPassPortDeliveryDate |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasExpirationDate | ex:DjamelPassPortExpirationDate |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasNumber | ex:DjamelPassPortNumber |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasDeliveryDate | ex:DjamelDriverLicenseDeliveryDate |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasExpirationDate | ex:DjamelDriverLicenseExpirationDate |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasNumber | ex:DjamelDriverLicenseNumber |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:DriverLicense |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasValue | Prenom |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:LastName |
| ex:Djamel | ex:hasService | ex:RentVehicle | NA | NA |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasValue | 25 |
| ex:Djamel | ex:hasAge | ex:DjamelAge | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasValue | ergdrg |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasValue | 4 |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasValue | 31/12/2011 |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasDeliveryDate | ex:ergergghbjk_IdentityCardDeliveryDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasExpirationDate | ex:ergergghbjk_IdentityCardExpirationDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasNumber | ex:ergergghbjk_IdentityCardNumber |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasDeliveryDate | ex:ergergghbjk_PassPortDeliveryDate |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasExpirationDate | ex:ergergghbjk_PassPortExpirationDate |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasNumber | ex:ergergghbjk_PassPortNumber |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:ergergghbjk_ | ex:hasService | ex:BuyBusTicket | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2002/07/owl#NamedIndividual |
| ex:ergergghbjk_ | ex:hasService | ex:BuyBusTicket | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:LandTransportationService |
| ex:ergergghbjk_ | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:ergergghbjk_ | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasValue | binjk,l |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasValue | 2 |
| ex:Taleb | ex:hasAge | ex:TalebAge | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasValue | 20/12/2013 |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasDeliveryDate | ex:TalebIdentityCardDeliveryDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasExpirationDate | ex:TalebIdentityCardExpirationDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasNumber | ex:TalebIdentityCardNumber |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasDeliveryDate | ex:TalebPassPortDeliveryDate |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasExpirationDate | ex:TalebPassPortExpirationDate |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasNumber | ex:TalebPassPortNumber |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:Taleb | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:Taleb | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+
的子类，则根本不需要任何类型转换
UIViewController