Use hidden SFSafariViewController

hidden_safari_view_controller.swift

    private func showHiddenSafariViewController(controller:SFSafariViewController) {
        controller.view.userInteractionEnabled = false
        controller.view.alpha = 0.0
        self.addChildViewController(controller)
        self.view.addSubview(controller.view)
        controller.didMoveToParentViewController(self)
        controller.view.frame = CGRectZero
    }
    
    private func removeHiddenSafariViewController(controller:SFSafariViewController) {
        controller.willMoveToParentViewController(nil)
        controller.view.removeFromSuperview()
        controller.removeFromParentViewController()
    }

Thanks.