Keep text in UITextView highlighted when the popover is dismissed - ios

Question

I have a UIPopover that shows up a plain view containing a UITextView filled with some text. I have managed to highlight the text. When the popover is dismissed, and re-opened, the highlight disappears. I want to keep the text highlighted even if if the application is closed. Any ideas how to achieve that?The code i used is the following :
- (void)highlight {
NSRange selectedRange = self.textViewAll.selectedRange;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]
initWithAttributedString:self.textViewAll.attributedText];
[attributedString addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:selectedRange];
// [highlightedRange addObject:];
// This is where i tried to save each location and length in a mutable array but didn't work
[highlightedRangeLocation insertObject:[NSNumber numberWithInteger:selectedRange.location] atIndex:indexOfHighlight];
[highlightedRangeLength insertObject:[NSNumber numberWithInteger:selectedRange.length] atIndex:indexOfHighlight];
///////////////////////////////////////////////////////////////////////////////
self.textViewAll.attributedText = attributedString;
indexOfHighlight ++ ;
}
- (void)viewDidLoad {
UIMenuItem *highlightMenuItem = [[UIMenuItem alloc] initWithTitle:#"Highlight" action:#selector(highlight)];
[[UIMenuController sharedMenuController] setMenuItems:[NSArray arrayWithObject:highlightMenuItem]];
float sysVer = [[[UIDevice currentDevice] systemVersion] floatValue];
if (sysVer >= 8.0) {
self.textViewAll.layoutManager.allowsNonContiguousLayout = NO;
}
}
Could anyone point out how to continue from here?
Edit 1 :
The code that close the popover :
- (IBAction)closeFun:(id)sender {
// self.popoverPresentationController set
[self dismissViewControllerAnimated:YES completion:nil];
// [self dismis]
}

Answer 1

Can't you juste save the Highlighted text range in [NSUserDefaults standardUserDefaults] whenever the popover is dismissed, and retrieve it when the popover reappears ?

Answer 2

I think the problem is in the fact that the popover is responsible for the highlighted state, i.e .it is the popover who keeps that fact/state.
The popover is a part of presentation layer / user interface. Surely the highlight represents some fact that ( now comes the catch ) - is completely independent of the popover.
For example highlighting a task could represent that the task is due. Or, highlighting a label to red color could mean that the balance in the bank is in negative numbers.
You see, no matter what user interface element you use, they only represent some underlying business reality.
But what probably happens you create a popover instance, you set it to have a highlighted element. But then this concrete popover instance dies, when it is closed.
And the highlight dies with it.
When you click some button (I guess), a popover shows up, but it is a different instance. This instance doesn't know about highlight.
Even if you somehow managed to keep the one instance of popover alive, and just hide and show it again, the popover should NOT be responsible to know whether something is red or due, (and thus highlighted.)
In you application, you should have a well separated model layer...which is basically a set of related objects that represent state ie. fact that are related to what the application solves from business perspective (for ex. draws lines, calculates interest..stores music..anything really). This model layer, some object in it, should store the facts..ie.e. the task is due, or the balance is low.
Every time you show your popover, you should investigate what are the underlying facts in your model layer right when the popover is being shown. Ivestigating means find a programmatic way to look into model objects, find out about values there and and set up the highlight in that moment again based on this "investigation". You should not rely on the fact that it was highlighted in the not so distant past.