这是我的主UITableViewController
中的代码块,其类别为InventoryTableViewController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
super.prepare(for: segue, sender: sender)
switch segue.identifier! {
case "detailSegue":
guard let inventoryDetail = segue.destination as? InventoryDetailView else {
fatalError("Unexpected destination: \(segue.destination)")
}
guard let selectedVehicleCell = sender as? InventoryTableViewCell else {
fatalError("Unexpected sender: \(String(describing: sender))")
}
guard let indexPath = tableView.indexPath(for: selectedVehicleCell) else {
fatalError("The selected cell is not being displayed by the table")
}
let selectedVehicle = vehicles[indexPath.row]
inventoryDetail.vehicle = selectedVehicle as? InventoryDetailView.Inventory
printGenericInfo(selectedVehicle)
default:
fatalError("Unexpected Segue Identifier; \(String(describing: segue.identifier))")
}
}
func printGenericInfo<T>(_ value: T) {
let t = type(of: value as Any)
print("'\(value)' of type '\(t)'")
}
我正在尝试通过selectedVehicle。当我打印值和类型时,它如下(正确):
库存(id:1004,年份:“ 2014”,品牌:“ MakeWith15Chars”,型号: “ ModelWith15Chars”,正文:“ BodyWith15Chars”,内部:“ Hickory”, 外观:“磁性灰色”,Vin:“ 2C4RDGCG0FR805928”,英里:“ 10450”, msrp:“ 33,800.00”,成本:“ 28,100.00”),类型为库存
我的InventoryDetailView
中的代码块如下:
class InventoryDetailView: UIViewController {
var vehicle: Inventory!
struct Inventory: Hashable, Codable, Identifiable {
var id: Int
var year: String
var make: String
var model: String
var body: String
var interior: String
var exterior: String
var vin: String
var miles: String
var msrp: String
var cost: String
}
override func viewDidLoad() {
super.viewDidLoad()
yearMakeLabel.text = vehicle?.year
}
}
当我在InventoryDetailView中打印车辆的值为nil时。为什么?我在做什么错了?
答案 0 :(得分:-1)
我认为,首先,您必须删除此行super.prepare(for: segue, sender: sender)
,因为您不需要调用它