我如何以编程方式设置一个故事板的InitialViewController ?我想打开我的故事板到一个不同的视图这取决于不同的启动条件。
当前回答
我创建了一个路由类来处理动态导航和保持干净的AppDelegate类，我希望它也能帮助其他。
//
// Routing.swift
//
//
// Created by Varun Naharia on 02/02/17.
// Copyright © 2017 TechNaharia. All rights reserved.
//
import Foundation
import UIKit
import CoreLocation
class Routing {
class func decideInitialViewController(window:UIWindow){
let userDefaults = UserDefaults.standard
if((Routing.getUserDefault("isFirstRun")) == nil)
{
Routing.setAnimatedAsInitialViewContoller(window: window)
}
else if((userDefaults.object(forKey: "User")) != nil)
{
Routing.setHomeAsInitialViewContoller(window: window)
}
else
{
Routing.setLoginAsInitialViewContoller(window: window)
}
}
class func setAnimatedAsInitialViewContoller(window:UIWindow) {
Routing.setUserDefault("Yes", KeyToSave: "isFirstRun")
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let animatedViewController: AnimatedViewController = mainStoryboard.instantiateViewController(withIdentifier: "AnimatedViewController") as! AnimatedViewController
window.rootViewController = animatedViewController
window.makeKeyAndVisible()
}
class func setHomeAsInitialViewContoller(window:UIWindow) {
let userDefaults = UserDefaults.standard
let decoded = userDefaults.object(forKey: "User") as! Data
User.currentUser = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! User
if(User.currentUser.userId != nil && User.currentUser.userId != "")
{
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeViewController: HomeViewController = mainStoryboard.instantiateViewController(withIdentifier: "HomeViewController") as! HomeViewController
let loginViewController: UINavigationController = mainStoryboard.instantiateViewController(withIdentifier: "LoginNavigationViewController") as! UINavigationController
loginViewController.viewControllers.append(homeViewController)
window.rootViewController = loginViewController
}
window.makeKeyAndVisible()
}
class func setLoginAsInitialViewContoller(window:UIWindow) {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let loginViewController: UINavigationController = mainStoryboard.instantiateViewController(withIdentifier: "LoginNavigationViewController") as! UINavigationController
window.rootViewController = loginViewController
window.makeKeyAndVisible()
}
class func setUserDefault(_ ObjectToSave : Any? , KeyToSave : String)
{
let defaults = UserDefaults.standard
if (ObjectToSave != nil)
{
defaults.set(ObjectToSave, forKey: KeyToSave)
}
UserDefaults.standard.synchronize()
}
class func getUserDefault(_ KeyToReturnValye : String) -> Any?
{
let defaults = UserDefaults.standard
if let name = defaults.value(forKey: KeyToReturnValye)
{
return name as Any
}
return nil
}
class func removetUserDefault(_ KeyToRemove : String)
{
let defaults = UserDefaults.standard
defaults.removeObject(forKey: KeyToRemove)
UserDefaults.standard.synchronize()
}
}
在AppDelegate中调用这个
self.window = UIWindow(frame: UIScreen.main.bounds)
Routing.decideInitialViewController(window: self.window!)
其他回答
选择要首先打开的视图控制器，然后转到属性检查器。 转到初始场景，检查初始视图控制器选项。
这是你的初始视图控制器在应用启动时首先打开。
找到了简单的解决方案-不需要从故事板和编辑项目信息选项卡中删除“初始视图控制器检查”，并使用makeKeyAndVisible，只是放置
self.window.rootViewController = rootVC;
in
- (BOOL) application:didFinishLaunchingWithOptions:
我创建了一个路由类来处理动态导航和保持干净的AppDelegate类，我希望它也能帮助其他。
//
// Routing.swift
//
//
// Created by Varun Naharia on 02/02/17.
// Copyright © 2017 TechNaharia. All rights reserved.
//
import Foundation
import UIKit
import CoreLocation
class Routing {
class func decideInitialViewController(window:UIWindow){
let userDefaults = UserDefaults.standard
if((Routing.getUserDefault("isFirstRun")) == nil)
{
Routing.setAnimatedAsInitialViewContoller(window: window)
}
else if((userDefaults.object(forKey: "User")) != nil)
{
Routing.setHomeAsInitialViewContoller(window: window)
}
else
{
Routing.setLoginAsInitialViewContoller(window: window)
}
}
class func setAnimatedAsInitialViewContoller(window:UIWindow) {
Routing.setUserDefault("Yes", KeyToSave: "isFirstRun")
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let animatedViewController: AnimatedViewController = mainStoryboard.instantiateViewController(withIdentifier: "AnimatedViewController") as! AnimatedViewController
window.rootViewController = animatedViewController
window.makeKeyAndVisible()
}
class func setHomeAsInitialViewContoller(window:UIWindow) {
let userDefaults = UserDefaults.standard
let decoded = userDefaults.object(forKey: "User") as! Data
User.currentUser = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! User
if(User.currentUser.userId != nil && User.currentUser.userId != "")
{
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeViewController: HomeViewController = mainStoryboard.instantiateViewController(withIdentifier: "HomeViewController") as! HomeViewController
let loginViewController: UINavigationController = mainStoryboard.instantiateViewController(withIdentifier: "LoginNavigationViewController") as! UINavigationController
loginViewController.viewControllers.append(homeViewController)
window.rootViewController = loginViewController
}
window.makeKeyAndVisible()
}
class func setLoginAsInitialViewContoller(window:UIWindow) {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let loginViewController: UINavigationController = mainStoryboard.instantiateViewController(withIdentifier: "LoginNavigationViewController") as! UINavigationController
window.rootViewController = loginViewController
window.makeKeyAndVisible()
}
class func setUserDefault(_ ObjectToSave : Any? , KeyToSave : String)
{
let defaults = UserDefaults.standard
if (ObjectToSave != nil)
{
defaults.set(ObjectToSave, forKey: KeyToSave)
}
UserDefaults.standard.synchronize()
}
class func getUserDefault(_ KeyToReturnValye : String) -> Any?
{
let defaults = UserDefaults.standard
if let name = defaults.value(forKey: KeyToReturnValye)
{
return name as Any
}
return nil
}
class func removetUserDefault(_ KeyToRemove : String)
{
let defaults = UserDefaults.standard
defaults.removeObject(forKey: KeyToRemove)
UserDefaults.standard.synchronize()
}
}
在AppDelegate中调用这个
self.window = UIWindow(frame: UIScreen.main.bounds)
Routing.decideInitialViewController(window: self.window!)
使用storyboard(而不是Main)设置初始ViewController
[Swift 5和Xcode 11]
主要。>属性检查器->取消勾选初始视图控制器 应用程序目标->通用->删除所有从主界面 编辑App委托
@main
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
let storyboard: UIStoryboard = UIStoryboard(name: "SomeStoryboard", bundle: nil) //SomeStoryboard is name of .storyboard
let viewController: ViewController = storyboard.instantiateViewController(withIdentifier: "someStoryboardId") as! ViewController //someStoryboardId is Storyboard ID
self.window?.rootViewController = viewController
self.window?.makeKeyAndVisible()
return true
}
}
Swift 5或以上版本#创建路由视图控制器 如果你使用xcode 11或以上版本，首先初始化var window: UIWindow?在AppDelegate
let rootVC = mainStoryboard.instantiateViewController(withIdentifier: "YOURCONTROLLER") as! YOURCONTROLLER
navigationController.setNavigationBarHidden(true, animated: true)
UIApplication.shared.windows.first?.rootViewController = UINavigationController.init(rootViewController: rootVC)
UIApplication.shared.windows.first?.makeKeyAndVisible()
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