At some time I present UIImagePickerViewController. Once it is presented, I call my function: UIStoryboard.topViewController():
extension UIStoryboard {
class func topViewController(base: UIViewController? = UIApplication.sharedApplication().keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(nav.visibleViewController)
}
if let svc = base as? UISplitViewController where svc.viewControllers.count == 1 {
return topViewController(svc.viewControllers[0])
}
if let presented = base?.presentedViewController {
return topViewController(presented)
}
return base
}
}
When I print result, all I get is:
0x000000014cb2aa00
{
UIKit.UIResponder = {...}
}
How to get UIImagePickerController from topViewController() function?
Not a complete answer to your case, but here's how I find the top VC in my program. You should be able to edit it for your case.
class UIHelper {
static func getCurrentViewController() -> UIViewController? {
var currentViewController: UIViewController?
if let window = UIApplication.sharedApplication().delegate?.window {
currentViewController = window!.rootViewController?.presentedViewController
}
if currentViewController == nil {
return nil
}
//Check for my version of my main tab bar VC
if let tabBarController = currentViewController as? RootTabBarController {
currentViewController = tabBarController.selectedViewController
print("Tab bar presents \(currentViewController)")
}
// Check if it's a nav VC
if let navController = currentViewController as? UINavigationController {
currentViewController = navController.viewControllers[0] as? UIViewController
print("Nav controller presents \(currentViewController)")
}
print("Current controller: \(currentViewController)")
return currentViewController
}
}
Related
I'm trying to check specific VC if app is running in foreground. My root view controller class is SWRevealViewController. After that I have a TabBarController and under it there is NavigationController and ViewController under it.
My heirachy is,
SWRevealViewController --> TabBar Controller --> Navigation Controller --> MessageVC --> ChatVC
I want to check in app delegate if app is on ChatVC or not if running on foreground.I have tried this code,
let tabBar:UITabBarController = self.window?.rootViewController as! UITabBarController
let navInTab:UINavigationController = tabBar.viewControllers?[1] as! UINavigationController
let storyboard = UIStoryboard(name: "Dashboard", bundle: nil)
let destinationViewController = storyboard.instantiateViewController(withIdentifier: "ChatDetailViewController") as? ChatDetailViewController
if destinationViewController?.restorationIdentifier == "ChatDetailViewController"
{
print("Yes")
}
else
{
print("No")
}
But app crashes with this error,
Could not cast value of type 'SWRevealViewController' (0x100dc4b20) to 'UITabBarController' (0x211b289f0).
How i can check if app is on ChatVC or not?
Screenshot of storyboard :
I have an extension for it
extension UIApplication {
class func topViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(base: nav.visibleViewController)
}
if let tab = base as? UITabBarController {
let moreNavigationController = tab.moreNavigationController
if let top = moreNavigationController.topViewController, top.view.window != nil {
return topViewController(base: top)
} else if let selected = tab.selectedViewController {
return topViewController(base: selected)
}
}
if let presented = base?.presentedViewController {
return topViewController(base: presented)
}
return base
}
}
USAGE:
if UIApplication.topViewController is YourViewController {
// do smth
}
I never used SWRevealViewController but you can try this.
As you said in your first line "SWRevealViewController is the RooVC" and you are converting the SWRevealViewController to UITabBarController (check below line of your code). This is your crash reason.
let tabBar:UITabBarController = self.window?.rootViewController as! UITabBarController
Now you need to change, UITabBarController to SWRevealViewController
let rootVC = self.window?.rootViewController as! SWRevealViewController
Now get all ViewControllers
if let navController = rootVC.navigationController { // for safety check
for controller in navController.viewControllers {
if controller is ChatVC {
print("Chat VC is available")
break
}
}
}
For safe coding and keeping swift optional binding in mind, you can do code like below,
Updated answer
var haveChatVC = false
if let rootVC = self.window?.rootViewController as? SWRevealViewController,
let tabbar = rootVC.frontViewController as? UITabBarController {
if let requiredNC = tabbar.viewControllers?[1] as? UINavigationController {
for vc in requiredNC.viewControllers {
if vc is ChatVC {
// ...
haveChatVC = true
break
}
}
}
else {
print("Navigation controller not found.")
}
}
else {
print("Unable to get root controller or navigation controller")
}
if haveChatVC {
// do task here when chat vc available
}
else {
// do task here when chat vc not available
}
Note: This is only pseudo code.
So, I'm using the method bellow from UIApplication extension to get the top view controller:
class func topViewController(controller: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let navigationController = controller as? UINavigationController {
return topViewController(controller: navigationController.visibleViewController)
}
if let tabController = controller as? UITabBarController {
if let selected = tabController.selectedViewController {
return topViewController(controller: selected)
}
}
if let presented = controller?.presentedViewController {
return topViewController(controller: presented)
}
return controller
}
But the problem is: It always returns UIViewController. But I need to check if it is MyViewController for example. How do I achieve that?
Do conditional casting on the return value to safely check its type.
if let currentVC = UIApplication.topViewController() as? MyViewController {
//the type of currentVC is MyViewController inside the if statement, use it as you want to
}
Your whole function implementation is flawed, if it actually worked, it would lead to infinite recursion. Once you find out the type of your current top view controller in your if statements, you are calling the same function again with the current root controller as its input value. Your function only ever exists, if it reaches either a call from a view controller, whose class is none of the ones specified in your optional bindings.
Moreover, your whole implementation doesn't do anything at the moment. You find out the type of your root view controller, but than you upcast it by returning a value of type UIViewController.
You can do a conditional check with an if-let statement like this:
if let presented = controller?.presentedViewController as? MyViewController {
// it is a MyViewController
}
You can also just directly check if the UIViewController is that type of class like this:
if controller?.presentedViewController is MyViewController {
// it is a MyViewController
}
Try this:
if let presented = controller?.presentedViewController as? MyViewController {
...
You can check it in following ways
class func topViewController(controller: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let navigationController = controller as? UINavigationController {
return topViewController(controller: navigationController.visibleViewController)
}
else if let tabController = controller as? UITabBarController {
if let selected = tabController.selectedViewController {
return topViewController(controller: selected)
}
}
else if let presented = controller?.presentedViewController {
return topViewController(controller: presented)
}
return controller
}
// Answer
if let topVC = AppDelegate.topViewController() as? MyViewController {
// Here your topVC is MyViewController
}
// or
if let topVC = AppDelegate.topViewController() {
if topVC is MyViewController {
// Here your topVC is MyViewController
}
}
To use the UIViewController as MyViewController:
if let myViewController = UIApplication.topViewController() as? MyViewController { ... }
or if you just want to check that the UIViewController is of type MyViewController:
if UIApplication.topViewController() is MyViewController { ... }
Here is the code I have. I have tried a few different approaches and some of them gives me the error that the view is not in the hierarchy.
The code snippet below goes in the correct else but can't perform the segue or presentViewController
func applicationDidTimout(notification: NSNotification) {
if let vc = self.window?.rootViewController as? UINavigationController {
if let myTableViewController = vc.visibleViewController as? AccountsOverviewViewController {
// Call a function defined in your view controller.
myTableViewController.signOffUser()
} else {
// We are not on the main view controller. Here, you could segue to the desired class.
let storyboard = UIStoryboard(name: "Accounts", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("AccountsNavigationController") as UIViewController
let vc2 = getVisibleViewController(nil)
vc2?.presentViewController(vc, animated: true, completion: nil)
}
}
}
func getVisibleViewController(var rootViewController: UIViewController?) -> UIViewController? {
if rootViewController == nil {
rootViewController = UIApplication.sharedApplication().keyWindow?.rootViewController
}
if rootViewController?.presentedViewController == nil {
return rootViewController
}
if let presented = rootViewController?.presentedViewController {
if presented.isKindOfClass(UINavigationController) {
let navigationController = presented as! UINavigationController
return navigationController.viewControllers.last!
}
if presented.isKindOfClass(UITabBarController) {
let tabBarController = presented as! UITabBarController
return tabBarController.selectedViewController!
}
return getVisibleViewController(presented)
}
return nil
}
Use the func below to get the visible view controller,
func getVisibleVC() -> UIViewController? {
if var visibleVC = window?.rootViewController {
while let presentedVC = visibleVC.presentedViewController {
visibleVC = presentedVC
}
return visibleVC
}
return nil
}
I am using the following extension to find the top most ViewController.
If alert is presented, the code above gives UIAlertController.
How do I get top view controller under UIAlertController?
Create an UIApplication extension like below and UIApplication.topViewController() will return the top most UIViewController under UIAlertController
iOS 13+
extension UIApplication {
class func topViewController(controller: UIViewController? = UIApplication.shared.windows.first?.rootViewController) -> UIViewController? {
if let navigationController = controller as? UINavigationController {
return topViewController(controller: navigationController.visibleViewController)
}
if let tabController = controller as? UITabBarController {
if let selected = tabController.selectedViewController {
return topViewController(controller: selected)
}
}
if let presented = controller?.presentedViewController {
return topViewController(controller: presented)
}
if let alert = controller as? UIAlertController {
if let navigationController = alert.presentingViewController as? UINavigationController {
return navigationController.viewControllers.last
}
return alert.presentingViewController
}
return controller
}
}
iOS 12-
extension UIApplication {
class func topViewController(controller: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let navigationController = controller as? UINavigationController {
return topViewController(controller: navigationController.visibleViewController)
}
if let tabController = controller as? UITabBarController {
if let selected = tabController.selectedViewController {
return topViewController(controller: selected)
}
}
if let presented = controller?.presentedViewController {
return topViewController(controller: presented)
}
if let alert = controller as? UIAlertController {
if let navigationController = alert.presentingViewController as? UINavigationController {
return navigationController.viewControllers.last
}
return alert.presentingViewController
}
return controller
}
}
You can get the parent controller of UIAlertController using its presentingViewController property
extension UIApplication {
class func topViewController(base: UIViewController? = (UIApplication.sharedApplication().delegate as! AppDelegate).window?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(base: nav.visibleViewController)
}
if let tab = base as? UITabBarController {
if let selected = tab.selectedViewController {
return topViewController(base: selected)
}
}
if let alert = base as? UIAlertController {
if let presenting = alert.presentingViewController {
return topViewController(base: presenting)
}
}
if let presented = base?.presentedViewController {
return topViewController(base: presented)
}
return base
}
}
Use these changes in your code, Not tested on XCode.
You could check if the next viewController is UIAlertController and if so return its parent. Something like this:
if let presented = base as? UIAlertController {
return base.presentingViewController
}
Add this in the extension you use before return.
Updated
extension UIApplication {
class func topViewController(base: UIViewController? = (UIApplication.sharedApplication().delegate as! AppDelegate).window?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(base: nav.visibleViewController)
}
if let tab = base as? UITabBarController {
if let selected = tab.selectedViewController {
return topViewController(base: selected)
}
}
if let presented = base?.presentedViewController {
return topViewController(base: presented)
}
if let alert = base as? UIAlertController {
return alert.presentingViewController
}
return base
}
}
I used this extension to get the top most view controller under an UIAlertController, basically what I do is to stop looking for top view controller when I found one that is an UIAlertController.
extension UIApplication {
var topViewController: UIViewController? {
var viewController = keyWindow?.rootViewController
guard viewController != nil else { return nil }
var presentedViewController = viewController?.presentedViewController
while presentedViewController != nil, !(presentedViewController is UIAlertController) {
switch presentedViewController {
case let navagationController as UINavigationController:
viewController = navagationController.viewControllers.last
case let tabBarController as UITabBarController:
viewController = tabBarController.selectedViewController
default:
viewController = viewController?.presentedViewController
}
presentedViewController = viewController?.presentedViewController
}
return viewController
}
}
I think you want to push a new VC on current top visible VC which is a UIAlertController, then this UIAlertController will disappear immediately, cause pushed new VC dismiss too. Finally, you can not push a new VC.
The problem is, if you new a UIAlertView, then call show, Cocoa Touch will initialize a new window which rootViewController is UIApplicationRotationFollowingController which presentingViewController is UIAlertController. So you cannot traverse the top most VC under UIAlertController because it exist in another window!
So if topViewController traverse from keyWindow?.rootViewController, find a UIAlertController, call topViewController again but traverse from window what you want, such as (UIApplication.sharedApplication().delegate as! AppDelegate).window?.rootViewController
This is the correct one:
func firstApplicableViewController() -> UIViewController? {
if (self is UITabBarController) {
let tabBarController = self as? UITabBarController
return tabBarController?.selectedViewController?.firstApplicableViewController()
} else if (self is UINavigationController) {
let navigationController = self as? UINavigationController
return navigationController?.visibleViewController?.firstApplicableViewController()
} else if (self is UIAlertController) {
let presentingViewController: UIViewController = self.presentingViewController!
return presentingViewController.firstApplicableViewController()
} else if self.presentedViewController != nil {
let presentedViewController: UIViewController = self.presentedViewController!
if (presentedViewController is UIAlertController) {
return self
} else {
return presentedViewController.firstApplicableViewController()
}
} else {
return self
}
}
I have some viewControllers, and I don't use NavigationController.
How can I get visible view controller in app delegate methods (e.g. applicationWillResignActive)?
I know how to do it from NSNotification, but I think it's the wrong way.
This should do it for you:
- (void)applicationWillResignActive:(UIApplication *)application
{
UIViewController *vc = [self visibleViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}
- (UIViewController *)visibleViewController:(UIViewController *)rootViewController
{
if (rootViewController.presentedViewController == nil)
{
return rootViewController;
}
if ([rootViewController.presentedViewController isKindOfClass:[UINavigationController class]])
{
UINavigationController *navigationController = (UINavigationController *)rootViewController.presentedViewController;
UIViewController *lastViewController = [[navigationController viewControllers] lastObject];
return [self visibleViewController:lastViewController];
}
if ([rootViewController.presentedViewController isKindOfClass:[UITabBarController class]])
{
UITabBarController *tabBarController = (UITabBarController *)rootViewController.presentedViewController;
UIViewController *selectedViewController = tabBarController.selectedViewController;
return [self visibleViewController:selectedViewController];
}
UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController;
return [self visibleViewController:presentedViewController];
}
#aviatorken89's answer worked well for me. I had to translate it to Swift -
for anybody starting out with Swift:
Updated for Swift 3:
func getVisibleViewController(_ rootViewController: UIViewController?) -> UIViewController? {
var rootVC = rootViewController
if rootVC == nil {
rootVC = UIApplication.shared.keyWindow?.rootViewController
}
if rootVC?.presentedViewController == nil {
return rootVC
}
if let presented = rootVC?.presentedViewController {
if presented.isKind(of: UINavigationController.self) {
let navigationController = presented as! UINavigationController
return navigationController.viewControllers.last!
}
if presented.isKind(of: UITabBarController.self) {
let tabBarController = presented as! UITabBarController
return tabBarController.selectedViewController!
}
return getVisibleViewController(presented)
}
return nil
}
Old answer:
func applicationWillResignActive(application: UIApplication) {
let currentViewController = getVisibleViewController(nil)
}
func getVisibleViewController(var rootViewController: UIViewController?) -> UIViewController? {
if rootViewController == nil {
rootViewController = UIApplication.sharedApplication().keyWindow?.rootViewController
}
if rootViewController?.presentedViewController == nil {
return rootViewController
}
if let presented = rootViewController?.presentedViewController {
if presented.isKindOfClass(UINavigationController) {
let navigationController = presented as! UINavigationController
return navigationController.viewControllers.last!
}
if presented.isKindOfClass(UITabBarController) {
let tabBarController = presented as! UITabBarController
return tabBarController.selectedViewController!
}
return getVisibleViewController(presented)
}
return nil
}
We implemented it as an UIApplication extension:
import UIKit
extension UIApplication {
var visibleViewController: UIViewController? {
guard let rootViewController = keyWindow?.rootViewController else {
return nil
}
return getVisibleViewController(rootViewController)
}
private func getVisibleViewController(_ rootViewController: UIViewController) -> UIViewController? {
if let presentedViewController = rootViewController.presentedViewController {
return getVisibleViewController(presentedViewController)
}
if let navigationController = rootViewController as? UINavigationController {
return navigationController.visibleViewController
}
if let tabBarController = rootViewController as? UITabBarController {
return tabBarController.selectedViewController
}
return rootViewController
}
}
Here is an answer in Swift 4 that is very similar to the accepted answer but has a few improvements:
Iterative instead of recursive.
Goes all the way does the navigation stack.
More "swifty" syntax.
Static variable that can be put anywhere (not just in AppDelegate).
Won't crash in odd cases, i.e. when a tab bar controller has no selected view controller.
static var visibleViewController: UIViewController? {
var currentVc = UIApplication.shared.keyWindow?.rootViewController
while let presentedVc = currentVc?.presentedViewController {
if let navVc = (presentedVc as? UINavigationController)?.viewControllers.last {
currentVc = navVc
} else if let tabVc = (presentedVc as? UITabBarController)?.selectedViewController {
currentVc = tabVc
} else {
currentVc = presentedVc
}
}
return currentVc
}
The top recommendations here will work ok in many scenarios to get the 'best guess' solution but with a few minor adjustments, we can get a more complete solution that doesn't rely on your app's view hierarchy implementation.
1) Cocoa Touch's view hierarchy allows for multiple children to be present and visible at one time so we need to instead ask for the current visible view controllers (plural) and handle the results accordingly
2) UINavigationControllers and UITabBarControllers are commonly used in iOS applications, but they are not the only kind of container view controllers. UIKit also supplies the UIPageViewController, UISplitViewController, and allows you to write your own custom container view controllers.
3) We probably want to ignore popover modals and specific types of view controllers such UIAlertControllers or a custom embedded child-viewcontroller.
private func visibleViewControllers() -> [UIViewController] {
guard let root = window?.rootViewController else { return [] }
return visibleLeaves(from: root, excluding: [UIAlertController.self])
}
private func visibleLeaves(from parent: UIViewController, excluding excludedTypes: [UIViewController.Type] = []) -> [UIViewController] {
let isExcluded: (UIViewController) -> Bool = { vc in
excludedTypes.contains(where: { vc.isKind(of: $0) }) || vc.modalPresentationStyle == .popover
}
if let presented = parent.presentedViewController, !isExcluded(presented) {
return self.visibleLeaves(from: presented, excluding: excludedTypes)
}
let visibleChildren = parent.childViewControllers.filter {
$0.isViewLoaded && $0.view.window != nil
}
let visibleLeaves = visibleChildren.flatMap {
return self.visibleLeaves(from: $0, excluding: excludedTypes)
}
if visibleLeaves.count > 0 {
return visibleLeaves
} else if !isExcluded(parent) {
return [parent]
} else {
return []
}
}
This is an improved version of #ProgrammierTier's answer. If you have a navbar nested in a tabbar, you will get back UINavigationController using #ProgrammierTier's answer. Also, there is less force unwrapping. This should address the issue #Harendra-Tiwari is facing.
Swift 4.2:
func getVisibleViewController(_ rootViewController: UIViewController?) -> UIViewController? {
var rootVC = rootViewController
if rootVC == nil {
rootVC = UIApplication.shared.keyWindow?.rootViewController
}
var presented = rootVC?.presentedViewController
if rootVC?.presentedViewController == nil {
if let isTab = rootVC?.isKind(of: UITabBarController.self), let isNav = rootVC?.isKind(of: UINavigationController.self) {
if !isTab && !isNav {
return rootVC
}
presented = rootVC
} else {
return rootVC
}
}
if let presented = presented {
if presented.isKind(of: UINavigationController.self) {
if let navigationController = presented as? UINavigationController {
return navigationController.viewControllers.last!
}
}
if presented.isKind(of: UITabBarController.self) {
if let tabBarController = presented as? UITabBarController {
if let navigationController = tabBarController.selectedViewController! as? UINavigationController {
return navigationController.viewControllers.last!
} else {
return tabBarController.selectedViewController!
}
}
}
return getVisibleViewController(presented)
}
return nil
}
Here is a recursive, protocol-oriented approach in Swift. Can be extended to custom types but any kind of UIViewController subclass should work with the code below.
public protocol ViewControllerContainer {
var topMostViewController: UIViewController? { get }
}
extension UIViewController: ViewControllerContainer {
public var topMostViewController: UIViewController? {
if let presentedView = presentedViewController {
return recurseViewController(presentedView)
}
return childViewControllers.last.map(recurseViewController)
}
}
extension UITabBarController {
public override var topMostViewController: UIViewController? {
return selectedViewController.map(recurseViewController)
}
}
extension UINavigationController {
public override var topMostViewController: UIViewController? {
return viewControllers.last.map(recurseViewController)
}
}
extension UIWindow: ViewControllerContainer {
public var topMostViewController: UIViewController? {
return rootViewController.map(recurseViewController)
}
}
func recurseViewController(viewController: UIViewController) -> UIViewController {
return viewController.topMostViewController.map(recurseViewController) ?? viewController
}
If you are using IQKeyboardManager they have an extension in there
(UIViewController*)currentViewController;
so you can do
application.keyWindow?.currentViewController? // <- there you go
so add this to your pod file
pod 'IQKeyboardManager'
then pod update and you are away!
hope this helps
If your app's root view controller is a UINavigationController than you can use this:
UIViewController *currentControllerName = ((UINavigationController*)appDelegate.window.rootViewController).visibleViewController;
and if you are using UITabBarController than you can use this:
UIViewController *currentControllerName = ((UITabBarController*)appDelegate.window.rootViewController).selectedViewController;
Here's a Swift 2.3 implementation of #ProgrammierTier's answer as an extension to a UIViewController
extension UIViewController {
var visibleViewController: UIViewController? {
if presentedViewController == nil {
return self
}
if let presented = presentedViewController {
if presented.isKindOfClass(UINavigationController) {
let navigationController = presented as! UINavigationController
return navigationController.viewControllers.last
}
if presented.isKindOfClass(UITabBarController) {
let tabBarController = presented as! UITabBarController
return tabBarController.selectedViewController
}
return presented.visibleViewController
}
return nil
}
}
To get it from applicationWillResignActive
func applicationWillResignActive(application: UIApplication) {
let visibleVC = application.keyWindow?.rootViewController?.visibleViewController
}
Here's just a quick fix inspired from #krcjr89's answer. The accepted answer doesn't go all the way down the navigation. For instance, if you have a navigation controller embedded in tab bar controller, you won't get to the visible view controller but the navigation controller.
I made it an extension of UIApplication like #Christian, as this makes the most sense.
extension UIApplication {
var visibleViewController: UIViewController? {
return getVisibleViewController(nil)
}
private func getVisibleViewController(_ rootViewController: UIViewController?) -> UIViewController? {
let rootVC = rootViewController ?? UIApplication.shared.keyWindow?.rootViewController
if rootVC!.isKind(of: UINavigationController.self) {
let navigationController = rootVC as! UINavigationController
return getVisibleViewController(navigationController.viewControllers.last!)
}
if rootVC!.isKind(of: UITabBarController.self) {
let tabBarController = rootVC as! UITabBarController
return getVisibleViewController(tabBarController.selectedViewController!)
}
if let presentedVC = rootVC?.presentedViewController {
return getVisibleViewController(presentedVC)
}
return rootVC
}
}
A modified version of a previous answer using UIViewController category in ObjC:
UIViewController+VisibleViewController.h
#import <UIKit/UIKit.h>
#interface UIViewController (VisibleViewController)
- (UIViewController *)visibleViewController;
#end
UIViewController+VisibleViewController.m
#import "UIViewController+VisibleViewController.h"
#implementation UIViewController (VisibleViewController)
- (UIViewController *)visibleViewController {
if (self.presentedViewController == nil) {
return self;
}
if ([self.presentedViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController *navigationController = (UINavigationController *)self.presentedViewController;
UIViewController *lastViewController = [[navigationController viewControllers] lastObject];
return [lastViewController visibleViewController];
}
if ([self.presentedViewController isKindOfClass:[UITabBarController class]]) {
UITabBarController *tabBarController = (UITabBarController *)self.presentedViewController;
UIViewController *selectedViewController = tabBarController.selectedViewController;
return [selectedViewController visibleViewController];
}
UIViewController *presentedViewController = (UIViewController *)self.presentedViewController;
return [presentedViewController visibleViewController];
}
#end
AppDelegate.m
#import "UIViewController+VisibleViewController.h"
- (UIViewController *) applicationVisibleViewController {
return [self.window.rootViewController visibleViewController];
}
In my case i have Tabbar controller and then Navigation controller for each Tab hope it helps someone
UIViewController *loginViewController = self.window.rootViewController;
UITabBarController *controller = loginViewController.tabBarController;
UIViewController *currentController = controller.selectedViewController.childViewControllers.lastObject;
modified from troop231
+ (UIViewController *)visibleViewController:(UIViewController *)rootViewController
{
if ([rootViewController isKindOfClass:[UINavigationController class]])
{
UINavigationController *navigationController = (UINavigationController *)rootViewController;
UIViewController *lastViewController = [[navigationController viewControllers] lastObject];
return [self visibleViewController:lastViewController];
}
if ([rootViewController isKindOfClass:[UITabBarController class]])
{
UITabBarController *tabBarController = (UITabBarController *)rootViewController;
UIViewController *selectedViewController = tabBarController.selectedViewController;
return [self visibleViewController:selectedViewController];
}
if (rootViewController.presentedViewController != nil)
{
UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController;
return [self visibleViewController:presentedViewController];
}
return rootViewController;
}