iOS 26 Beta， if create UIView() in viewDidLoad，Pan not works

[dongqiCyberflow]

class BasicViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    UIView() // will cause bug
}

}

[WineKai]

你找到解决方案了吗？

[shiyueGao]

Do you have a solution? I also encountered it

[WineKai]

Do you have a solution? I also encountered it
not yet

[shiyueGao]

I found the problem. On line 844 of the file 'PanModalPresentationController', replace the addRoundedCorners method with to fix it：

`

func addRoundedCorners(to view: UIView) {
    let radius = presentable?.cornerRadius ?? 0
    
    if #available(iOS 11.0, *) {
        view.layer.cornerRadius = radius
        view.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        view.layer.masksToBounds = true
    } else {
        let maskPath = UIBezierPath(roundedRect: view.bounds,
                                    byRoundingCorners: [.topLeft, .topRight],
                                    cornerRadii: CGSize(width: radius, height: radius))
        let maskLayer = CAShapeLayer()
        maskLayer.path = maskPath.cgPath
        view.layer.mask = maskLayer
    }
    
    view.layer.shouldRasterize = true
    view.layer.rasterizationScale = UIScreen.main.scale
    
    if #available(iOS 19.0, *) {
        let subviews = view.subviews
        view.subviews.forEach { $0.removeFromSuperview() }
        subviews.forEach { view.addSubview($0) }
        
        DispatchQueue.main.async {
            if #available(iOS 11.0, *) {
                view.layer.cornerRadius = radius
                view.layer.masksToBounds = true
            }
        }
    }
}

`

[WineKai]

I found the problem. On line 844 of the file 'PanModalPresentationController', replace the addRoundedCorners method with to fix it：

`

func addRoundedCorners(to view: UIView) {
    let radius = presentable?.cornerRadius ?? 0

    var bounds = view.bounds

    if #available(iOS 19, *) {
        var safeInsets = view.safeAreaInsets

        bounds = view.bounds.inset(by: safeInsets)

        bounds.origin.x = max(0, bounds.origin.x)
        bounds.origin.y = max(0, bounds.origin.y)
        bounds.size.width = max(0, bounds.size.width)
        bounds.size.height = max(0, bounds.size.height)
    }

    let path = UIBezierPath(roundedRect: bounds,
                            byRoundingCorners: [.topLeft, .topRight],
                            cornerRadii: CGSize(width: radius, height: radius))

    if presentable?.showDragIndicator == true {
        let indicatorLeftEdgeXPos = bounds.midX - Constants.dragIndicatorSize.width / 2.0
        drawAroundDragIndicator(currentPath: path, indicatorLeftEdgeXPos: indicatorLeftEdgeXPos)
    }

    // Set path as a mask to display optional drag indicator view & rounded corners
    let mask = CAShapeLayer()
    mask.path = path.cgPath
    view.layer.mask = mask

    if #available(iOS 19, *) {
        if let oldMask = view.layer.sublayers?.first(where: { $0.name == "panModalMask" }) {
            oldMask.removeFromSuperlayer()
        }
        mask.name = "panModalMask"
        view.layer.addSublayer(mask)
        view.layer.masksToBounds = true
    }

    // Improve performance by rasterizing the layer
    view.layer.shouldRasterize = true
    view.layer.rasterizationScale = UIScreen.main.scale

    if #available(iOS 19, *) {
        view.setNeedsLayout()
        view.layoutIfNeeded()
    }
}

`

this is work for me,tks bro

[Ismatillokon]

and also replace function addDragIndicatorView, I have used frame coz, view Does not have any constraints on iOS 26

func addDragIndicatorView(to view: UIView) {
let center: CGFloat
if #available(iOS 15.0, *),
let scane = UIApplication.shared.connectedScenes.first as? UIWindowScene,
let centerX = scane.keyWindow?.center.x
{
let x = centerX - (Constants.dragIndicatorSize.width / 2)
dragIndicatorView.frame = CGRect(
x: x,
y: Constants.indicatorYOffset,
width: Constants.dragIndicatorSize.width,
height: Constants.dragIndicatorSize.height
)
}
view.addSubview(dragIndicatorView)
}

[rahulVermaSimpplr]

here is the actual fix - #204