我下载了Apple's Table Search with UISearchController (Obj-C and Swift)示例代码。
我使用的是 Xcode 6.3 测试版。打开 Swift 文件后，我将代码转换为 Swift 1.2(通过编辑/转换)。转换后，我在 AppDelegate.swift 中收到以下编译器错误(我还注意到下面原始代码中出现错误的行。:
Objective-C method 'application:didFinishLaunchingWithOptions:' provided by method 'application(_:didFinishLaunchingWithOptions:)' conflicts with optional requirement method 'application(_:didFinishLaunchingWithOptions:)' in protocol 'UIApplicationDelegate'
'UIWindow?' does not have a member named 'rootViewController'`
有什么东西跳出来了吗？这是 AppDelegate.swift
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
// MARK: Properties
var window: UIWindow?
// MARK: Application Life Cycle
// error on the line below
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
let products = [
Product(type: Product.deviceTypeTitle, name: "iPhone", year: 2007, price: 599.00),
Product(type: Product.deviceTypeTitle, name: "iPod", year: 2001, price: 399.00),
Product(type: Product.deviceTypeTitle, name: "iPod touch", year: 2007, price: 210.00),
Product(type: Product.deviceTypeTitle, name: "iPad", year: 2010, price: 499.00),
Product(type: Product.deviceTypeTitle, name: "iPad mini", year: 2012, price: 659.00),
Product(type: Product.desktopTypeTitle, name: "iMac", year: 1997, price: 1299.00),
Product(type: Product.desktopTypeTitle, name: "Mac Pro", year: 2006, price: 2499.00),
Product(type: Product.portableTypeTitle, name: "MacBook Air", year: 2008, price: 1799.00),
Product(type: Product.portableTypeTitle, name: "MacBook Pro", year: 2006, price: 1499.00)
]
// error on the line below
let navController = window.rootViewController as! UINavigationController
// Note we want the first view controller (not the visibleViewController) in case
// we are being store from UIStateRestoration.
let tableViewController = navController.viewControllers[0] as! MainTableViewController
tableViewController.products = products
return true
}
// MARK: UIStateRestoration
func application(application: UIApplication, shouldSaveApplicationState coder: NSCoder) -> Bool {
return true
}
func application(application: UIApplication, shouldRestoreApplicationState coder: NSCoder) -> Bool {
return true
}
}
请您参考如下方法:
试试这个，你必须在访问它之前进行初始化:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
// declaration of products like in your above code
....
window = UIWindow(frame: UIScreen.mainScreen().bounds)
let navController = window!.rootViewController as! UINavigationController
let tableViewController = navController.viewControllers[0] as! MainTableViewController
tableViewController.products = products
return true
}
希望对你有帮助
