- (id <NSObject>)addObserverForName:(nullable NSNotificationName)name object:(nullable id)obj queue:(nullable NSOperationQueue *)queue usingBlock:(void(^)(NSNotification *note))block API_AVAILABLE(macos(10.6), ios(4.0), watchos(2.0), tvos(9.0)); 使用情況: NSNotificationCenter類一般用于一個對...
www.dbjr.com.cn/article/1416...htm 2025-6-10