How to display dynamic length strings in a scrollable popover on iOS with perfect padding 👌🏻🥇

MyControllerOrView.m

// Requires a property like the following
// @property (nonatomic, strong) UIPopoverController *textPopover;

- (void)displayPopoverForText:(NSString *)text inView:(UIView *)view presentingRect:(CGRect)rect maxSize:(CGSize)maxSize {
    UIViewController *controller = [UIViewController new];

    UITextView *textView = [UITextView new];
    textView.text = text;
    textView.editable = NO;
    textView.backgroundColor = [UIColor clearColor];
    textView.textColor = [UIColor blackColor];
    textView.textContainerInset = UIEdgeInsetsMake(8, 8, 8, 8);
    textView.scrollIndicatorInsets = textView.textContainerInset;
    textView.font = [UIFont systemFontOfSize:[UIFont labelFontSize]];

    CGRect boundingRect = [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin
                                          attributes:@{NSFontAttributeName: textView.font} context:nil];
    CGSize size = CGSizeMake(
        MIN(ceil(boundingRect.size.width), maxSize.width - 30) + 30,
        MIN(ceil(boundingRect.size.height), maxSize.height - 20) + 20
    );

    controller.view.frame = textView.frame = CGRectMake(0, 0, size.width, size.height);
    textView.textAlignment = [textView.text containsString:@"\n"] ? NSTextAlignmentLeft : NSTextAlignmentCenter;
    [controller.view addSubview:textView];
    controller.preferredContentSize = controller.view.frame.size;

    self.textPopover = [[UIPopoverController alloc] initWithContentViewController:controller];

    [self.textPopover presentPopoverFromRect:rect inView:view
                     permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}

// Example Usage:
// [self displayPopoverForText:text inView:tableView presentingRect:cell.frame maxSize:CGSizeMake(400, 400)];