UIPresentationController在经过大量延迟后呈现

Question

这是我展示自定义$crud->set_crud_url_path(site_url('admin/products/list')); 的方式：

UIPresentationController

点击func presentOverlayController(controller: UIViewController) { controller.modalPresentationStyle = .Custom controller.transitioningDelegate = self presentViewController(controller, animated: true, completion: nil) } //MARK: - UIViewControllerTransitioningDelegate public func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? { return OverlayPresentationController(presentedViewController: presented, presentingViewController: presenting) } 后，我会出示我的控制器。只有当我点击两次细胞时，它才会很快呈现。但是，当我执行单击时，它也能正常工作但延迟很大（15-60秒之间）。

是什么原因？ 如何解决它？

Answer 1

我发现了didSelectRowAtIndexPath的已知错误，这也是我使用的解决方法。

尝试在didSelectRowAtIndexPath：

中执行此操作

dispatch_async(dispatch_get_main_queue(), {
    presentOverlayController(......)
})

参考文献：

• UITableView didSelectRowAtIndexPath sometimes called after second tap
• UITableViewCell selection Storyboard segue is slow - double tapping works though

Answer 2

试试这个：

dispatch_async(dispatch_get_main_queue()) {
    self.presentViewController(controller, animated: true, completion: nil)
}