Issue with UIPopoverPresentationController position drifting on iPadOS 26.0

We need more information to understand the issue you described, please attach a focused sample project that reproduces the issue. See creating Apple Developer Forums posts, see tips on writing forums posts.

In iOS 26 standard components like bars, sheets, popovers, adopt liquid glass and have a new visual refresh, please see Adopting Liquid Glass.

if (ipad) { if (Button) { UIView *view = (UIView *)Button; sheet.modalPresentationStyle = UIModalPresentationPopover; UIPopoverPresentationController *popover = [sheet popoverPresentationController]; popover.sourceView = view; popover.backgroundColor = [JSThemeManager colorWithID:KKBackground_04];

            if (view.tag == 1000) {
                popover.permittedArrowDirections = UIPopoverArrowDirectionUp;
            } else {
                popover.sourceRect = CGRectMake(view.bounds.origin.x,
                                                view.bounds.origin.y,
                                                view.bounds.size.width + 3,
                                                view.bounds.size.height);
                popover.permittedArrowDirections = UIPopoverArrowDirectionUnknown;
            }
            
            CGFloat height = number * 72 + 32;
            
            CGFloat width = 219 + 35; // 默认
            
            sheet.preferredContentSize = CGSizeMake(width, height);
        } else {
            
            sheet.modalPresentationStyle = UIModalPresentationFormSheet;
        }
    }
    
    [ViewController presentViewController:sheet animated:YES completion:nil];