Question

should be a simple solution that I am missing. I have a Tab View Controller driven app that I would like to passcode protect whenever the app is launched or opened by the user. I have created a passcode class & view controller in IB.

I am trying to use the AppDelegate.m class applicationDidLoadInForeground method with the following code:

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    NSUserDefaults *submissionDefaults = [NSUserDefaults standardUserDefaults];
    if ([submissionDefaults boolForKey:@"passcodeActive"] == true)
    {   
        PINAuthViewController *pinController = [[PINAuthViewController alloc] init];
        [self presentViewController:pinController animated:YES completion:nil];
    }
}

I have imported my PINAuthViewController class in the header

#import "PINAuthViewController.h"

but I am receiving an error when compiling “No visible @interface for ‘AppDelegate’ declares the selector ‘presentViewController:animated:completion’.

Can anyone advise what I am doing wrong? The intention is to dismiss the passcode View Controller if the passcode is entered correctly.

Many thanks, James

Answer 1

The app delegate can’t present a view controller since it’s not a subclass of UIViewController itself.

You need to change your code to:

[self.window.rootViewController presentViewController:pinController animated:YES completion:nil];