为UIPresentationController无可见@interface声明选择initWithPresentingViewController：presentedViewController
我看WWDC 2014的视频A Look Inside Presentation Controllers
我下载会话的源代码（写在Objective-C），尝试构建它，我得到这个错误：为UIPresentationController无可见@interface声明选择initWithPresentingViewController：presentedViewController
No visible @interface for UIPresentationController declares the selector initWithPresentingViewController:presentedViewController.
该方法是否假设在UIPresentationController？
我从UIPresentationController的文档中找到答案，该方法应该是 - (instancetype)initWithPresentedViewController (UIViewController *)presentedViewController presentingViewController:(UIViewController*)presentingViewController;而不是-(instancetype)initWithPresentingViewController:(UIViewController *)presentingViewController presentedViewController:(UIViewController *)presentedViewController。 只要我改变它就修复了问题