爲UIPresentationController無可見@interface聲明選擇initWithPresentingViewController：presentedViewController

Question

我看WWDC 2014的視頻A Look Inside Presentation Controllers
我下載會話的源代碼（寫在Objective-C），嘗試構建它，我得到這個錯誤：

No visible @interface for UIPresentationController declares the selector initWithPresentingViewController:presentedViewController.

該方法是否假設在UIPresentationController？

Answer 1

我從UIPresentationController的文檔中找到答案，該方法應該是 - (instancetype)initWithPresentedViewController (UIViewController *)presentedViewController presentingViewController:(UIViewController*)presentingViewController;而不是-(instancetype)initWithPresentingViewController:(UIViewController *)presentingViewController presentedViewController:(UIViewController *)presentedViewController。 只要我改變它就修復了問題