我看了SO但是我无法找到任何问题来讨论当你收到推送通知时如何打开特定的视图控制器。 例如，如果您正在创建一个类似WhatsApp的应用程序，并且您收到两个不同的推送通知，即来自两个不同用户的消息，您将如何从应用程序委托指向相应的viewController？
据我所知，appDElegate给你的userinfo字典中你可以给一个特定的viewController提供一个ID，但我不知道如何向特定的视图控制器致敬，这样你就可以了再次直接到那个viewController。 请提供包含答案的代码段
**** Swift或Objective-C答案都是可以接受的****
答案 0 :(得分：15)
您可以使用此代码在app委托中检测应用是否已通过通知打开。在应用程序变为活动状态之前，您需要在应用程序状态为UIApplicationStateInactive时设置初始视图控制器。您可以在那里执行任何逻辑来决定应该打开哪个视图控制器以及应该在该视图控制器中显示哪些内容。
-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{
if(application.applicationState == UIApplicationStateActive) {
//app is currently active, can update badges count here
} else if(application.applicationState == UIApplicationStateBackground){
//app is in background, if content-available key of your notification is set to 1, poll to your backend to retrieve data and update your interface here
} else if(application.applicationState == UIApplicationStateInactive){
//app is transitioning from background to foreground (user taps notification), do what you need when user taps here
self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *viewController = // determine the initial view controller here and instantiate it with [storyboard instantiateViewControllerWithIdentifier:<storyboard id>];
self.window.rootViewController = viewController;
[self.window makeKeyAndVisible];
}
}
答案 1 :(得分：3)
这是带有switch / case而不是if / else
的Swift 3版本 open func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
switch application.applicationState {
case .active:
print("do stuff in case App is active")
case .background:
print("do stuff in case App is in background")
case .inactive:
print("do stuff in case App is inactive")
}
}
答案 2 :(得分：0)
//This method is called when user tap on the notification
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print("user clicked on the notification")
let userInfo = response.notification.request.content.userInfo
print(userInfo)
//check your response and navigate to specific view controller
moveToNextViewController()
}
func moveToNextViewController() {
//Add code for present or push view controller
let vc = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(withIdentifier:"ViewController") as! ViewController
self.navigationController?.pushViewController(vc, animated: true)
}
答案 3 :(得分：0)
当用户点击通知时调用此方法。在appdelegate中实现
var navigationC: UINavigationController?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
if USERDEFAULT.value(forKey: "isLogin") != nil {
let tabbarvc = MainStoryboard.instantiateViewController(withIdentifier: "TabBarVC") as! TabBarVC
self.navigationC = UINavigationController(rootViewController: tabbarvc)
}else {
let loginvc = MainStoryboard.instantiateViewController(withIdentifier: "LoginVC") as! LoginVC
self.navigationC = UINavigationController(rootViewController: loginvc)
}
self.navigationC?.setNavigationBarHidden(true, animated: false)
self.window?.clipsToBounds = true
self.window?.rootViewController = navigationC
self.window?.makeKeyAndVisible()
return true
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
print("-------------\nUser info in notification -> \(userInfo)\n-------------")
let dict = userInfo["aps"] as? NSDictionary ?? [:]
if USERDEFAULT.value(forKey:"isLogin") != nil{
let type = dict["type"] as? Int ?? 0
switch type {
case 0:
break
case 1:
for vc in self.navigationC!.viewControllers {
if vc is TabBarVc {
let exam = dict["exam"] as? String ?? ""
if exam == ""{
let TestVC = MainStoryboard.instantiateViewController(withIdentifier: "TestVC") as! TestVC
TestVC.chapterId = dict["chapter_id"] as? String ?? ""
TestVC.strSubTitle = dict["chapter"] as? String ?? ""
self.navigationC?.isNavigationBarHidden = true
self.navigationC?.pushViewController(TestVC, animated: true)
}else if exam != ""{
let ExamTestVC = MainStoryboard.instantiateViewController(withIdentifier: "ExamTestVC") as! ExamTestVC
ExamTestVC.examId = dict["exam_id"] as? String ?? ""
ExamTestVC.strSubTitle = dict["exam"] as? String ?? ""
self.navigationC?.isNavigationBarHidden = true
self.navigationC?.pushViewController(ExamTestVC, animated: true)
}
return;
}
}
break
case 2:
for vc in self.navigationC!.viewControllers {
if vc is TabBarVc {
let VideoListVC = MainStoryboard.instantiateViewController(withIdentifier: "VideoListVC") as! VideoListVC
VideoListVC.chapterId = dict["chapter_id"] as? String ?? ""
VideoListVC.video_id = dict["video_id"] as? String ?? ""
VideoListVC.strSubTitle = dict["chapter"] as? String ?? ""
VideoListVC.questionsCount = dict["question_count"] as? Int ?? 0
VideoListVC.testCount = dict["test_count"] as? Int ?? 0
self.navigationC?.isNavigationBarHidden = true
self.navigationC?.pushViewController(VideoListVC, animated: true)
return;
}
}
break
case 3:
break
default: break
}
}else{
let loginVC = SignupiPadStoryboard.instantiateViewController(withIdentifier: "LoginVC") as! LoginVC
SignupStoryboard = SignupiPadStoryboard
self.navigationC = UINavigationController(rootViewController: loginVC)
}
}
或者您可以直接打开打开的视图控制器，如whatsapp chat..etc。
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
let userInfo = notification.request.content.userInfo
let dictAps = userInfo["aps"] as! NSDictionary
print(dictAps)
let notification_type = dictAps["notification_type"] as? Int ?? 0
if notification_type == 6{
if isChatActive == false{
completionHandler([.alert, .badge, .sound])
}else{
if USERDEFAULT.value(forKey:"isLogin") != nil{
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "ReloadChatMessages"), object: nil, userInfo: (dictAps as! [AnyHashable : Any]))
}else{
completionHandler([.alert, .badge, .sound])
}
}
}else{
completionHandler([.alert, .badge, .sound])
}
}