UIPopover is displayed briefly after app kill and resume - ios

Question

I am trying to apply state preservation & restoration in an iPad app but if a popover is open then, during restoration, it is briefly displayed and then hides. This is caused by execution of code in viewDidLoad of the main view controller where the popover is attached to. This code takes some time to execute and it loads an html file in a web view. As a result when the web view finally loads the html file, popover disappears. Can I prevent the popover from hiding without moving the viewDidLoad code elsewhere?
Looking forward for your help!
- (void)viewDidLoad
{
[super viewDidLoad];
text = [NSString stringWithContentsOfFile:file encoding:NSUTF8StringEncoding error:&error];
NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webview loadHTMLString:text baseURL:baseURL];
}
This is the code that is run as a result of clicking on a bar button item.
However the problem appears when the app resumes with the popover previously left open.
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
if ([identifier isEqualToString:#"filterPopover"]) {
if (self.filterPopover == nil && self.prefsPopover == nil) {
return YES;
}
return NO;
}
if ([identifier isEqualToString:#"prefsPopover"]) {
if (self.prefsPopover == nil && self.filterPopover == nil) {
return YES;
}
return NO;
}
return YES;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"filterPopover"]) {
// Assign popover instance so we can dismiss it later
self.filterPopover = [(UIStoryboardPopoverSegue *)segue popoverController];
// assign delegate for popover dismiss purpose
self.filterPopover.delegate = self;
filterPopOverVisible = true;
}
if ([segue.identifier isEqualToString:#"prefsPopover"]) {
// Assign popover instance so we can dismiss it later
self.prefsPopover = [(UIStoryboardPopoverSegue *)segue popoverController];
// assign delegate for popover dismiss purpose
self.prefsPopover.delegate = self;
}
}