'"Application tried to present modally an active controller"?

I just came across a crash showing a NSInvalidArgumentException with this message on an app which wasn't doing this before.

Application tried to present modally an active controller UITabBarController: 0x83d7f00.

I have a UITabBarController which I create in the AppDelegate and give it the array of UIViewControllers.

One of them I want to present modally when tapped on it. I did that by implementing the delegate method

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController

If that view controller is of the class of the one I want to present modally, I return NO and do

[tabBarController presentModalViewController:viewController animated:YES];

And now I'm getting that error, which seems to mean that you can't present modally a view controller that is active somewhere else (in the tabbar...) I should say I'm on XCode 4.2 Developer Preview 7, so this is iOS 5 (I know about the NDA, but I think I'm not giving any forbidden details). I currently don't have an XCode installation to test if this crashes compiling against the iOS4 SDK, but I'm almost entirely sure it doesn't.

I only wanted to ask if anyone has experienced this issue or has any suggestion

Solution 1:^[1]

I have the same problem. I try to present view controller just after dismissing.

[self dismissModalViewControllerAnimated:YES];

When I try to do it without animation it works perfectly so the problem is that controller is still alive. I think that the best solution is to use dismissViewControllerAnimated:completion: for iOS5

Solution 2:^[2]

In my case i was trying to present the viewController (i have the reference of the viewController in the TabBarViewController) from different view controllers and it was crashing with the above message. In that case to avoid presenting you can use

viewController.isBeingPresented

!viewController.isBeingPresented {
          // Present your ViewController only if its not present to the user currently.
}

Might help someone.

Solution 3:^[3]

The same problem error happened to me when I tried to present a child view controller instead of its UINavigationViewController parent

Solution 4:^[4]

I had same problem.I solve it. You can try This code:

[tabBarController setSelectedIndex:1];
[self dismissModalViewControllerAnimated:YES];

Solution 5:^[5]

For React Native Developer - Problem might not be in AppDelegate Or main.m if app has been successfully build and is running and will crash after splash or perhaps the error screen

Issue might be due to use of fonts/resources that is not available with xcode and not properly configured.. You can find out the error by commenting certain portion starting from App.js and drilling inside the navigation/screens and commenting the components till you find the component that is generating the error....

In my case the resource of fontFamily was making an issue which was used right after splash in walkthrough screen

<Text style={{fontFamily: Fonts.roboto}}>ABC</Text>

Here font roboto wasnot configured properly. Wasted entire days just debugging the error hope its helps you

Solution 6:^[6]

Just remove

[tabBarController presentModalViewController:viewController animated:YES];

and keep

[self dismissModalViewControllerAnimated:YES];

Solution 7:^[7]

Instead of using:

self.present(viewControllerToPresent: UIViewController, animated: Bool, completion: (() -> Void)?)

you can use:

self.navigationController?.pushViewController(viewController: UIViewController, animated: Bool)

Solution 8:^[8]

In my case, I was presenting the rootViewController of an UINavigationController when I was supposed to present the UINavigationController itself.

Solution 9:^[9]

This is my way which supporting multiple Windows(from a single APP) on the iPad and nested modal present.

import UIKit

///?Use this public method
public func SheetViewController(ViewController:UIViewController) {
    
    for i in returnAvailableViewControllers().shuffled() {
        if i.presentedViewController == nil && !ViewController.isViewLoaded {i.present(ViewController, animated: true, completion:  {})}
    }
}

///Returns all possible ViewControllers
private func returnAvailableViewControllers() -> [UIViewController] {
    let ?? = UIApplication.shared.connectedScenes
    
    var ??VC : [UIViewController] = []

    for i in ?? {
        
        if i.activationState == .foregroundActive {
            //??Set up “foregroundActive” to give the user more control
            var ????? = (i.delegate as? UIWindowSceneDelegate)?.window??.rootViewController
            
            if ????? != nil {
                ??VC.append(?????!)
            }
            
            
            
            var ??? = true
            while ??? {
                //?Enumerate all child ViewController
                ????? = ??????.presentedViewController
                if ????? != nil {
                    ??VC.append(?????!)
                } else {
                    ???.toggle()
                }
            }
        }
        
        
    }
    return ??VC
}

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	Karthick Ramesh
Solution 3	Nik
Solution 4	Erhan Demirci
Solution 5	Rahul Shakya
Solution 6	user170317
Solution 7	aturan23
Solution 8	Laura Corssac
Solution 9	é—ªç”µç‹®

'"Application tried to present modally an active controller"?

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]

Solution 8:[8]

Solution 9:[9]