我正在使用存档对象来确定启动时需要加载哪个 View (或者只是从 sleep 状态打开应用程序)以及 bool 标志。尽管我的 if 语句计算正确,但其中的代码却不然。
以下是 didFinishLaunchingWithOptions 中的内容:
// Register permission to throw notifications
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Alert | .Badge | .Sound, categories: nil))
var so = StatusOverseer.sharedOverseer
println("User did finish application: \(so.userDidFinishApplication)")
println("Banks Did Respond: \(so.banksDidRespond)")
println("user did accept terms: \(so.userDidAcceptTerms)")
// Decide whether or not to present the waiting view
if so.userDidFinishApplication && !so.banksDidRespond {
let sb = UIStoryboard(name: "Main", bundle: nil)
let vc = sb.instantiateViewControllerWithIdentifier("submitWaiting") as! UIViewController
UIApplication.sharedApplication().keyWindow?.rootViewController = vc
}
else if so.banksDidRespond {
println("bip")
let sb = UIStoryboard(name: "Main", bundle: nil)
if so.notificationWasGood {
let vc = sb.instantiateViewControllerWithIdentifier("approved") as! UIViewController
UIApplication.sharedApplication().keyWindow?.rootViewController = vc
}
else {
let vc = sb.instantiateViewControllerWithIdentifier("notApproved") as! UIViewController
UIApplication.sharedApplication().keyWindow?.rootViewController = vc
}
}
else if so.userDidAcceptTerms {
println("Did Run")
let sb = UIStoryboard(name: "Main", bundle: nil)
let vc = sb.instantiateViewControllerWithIdentifier("LicenseViewNav") as! UIViewController
UIApplication.sharedApplication().keyWindow?.rootViewController = vc
}
这是控制台输出:
Recalling Status Overseer from Archive...
User did finish application: false
Banks Did Respond: false
user did accept terms: true
Did Run
请注意,底部的 else if
按预期运行,但我在启动时看到的 View 不是以下行中声明的 LicenseViewNav
:
let vc = sb.instantiateViewControllerWithIdentifier("LicenseViewNav") as! UIViewController
UIApplication.sharedApplication().keyWindow?.rootViewController = vc
如果有人知道发生了什么,那就太好了。谢谢!
编辑:当前问题似乎是 keyWindow
计算结果为 nil
最佳答案
在 swift 中设置 Root View Controller 的最佳方法
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
var rootView: MyRootViewController = MyRootViewController()
if let window = self.window{
window.rootViewController = rootView
}
return true
}
关于ios - 未从 AppDelegate 设置 RootViewController?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31966632/