通知(NSNotificationCenter)时间:2023-03-09 19:39:53 // 监听加载更多的通知 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadMoreDeals) name:@"loadMore" object:nil]; // 发出通知 [[NSNotificationCenter defaultCenter] postNotificationName:@"loadMore" object:nil];