iOS功能实现之列表的横向刷新加载

@interface UIScrollView (PSRefresh)

/**
 * 是否是最后一页
 */
@property (nonatomic, assign) BOOL isLastPage;

/**
 * header背景色
 */
@property (nonatomic, strong) UIColor *refreshHeaderBackgroundColor;

/**
 * footer背景色
 */
@property (nonatomic, strong) UIColor *refreshFooterBackgroundColor;

/**
 * header 字体
 */
@property (nonatomic, strong) UIFont *refreshHeaderFont;

/**
 * header 字体颜色
 */
@property (nonatomic, strong) UIColor *refreshHeaderTextColor;

/**
 * footer 字体
 */
@property (nonatomic, strong) UIFont *refreshFooterFont;

/**
 * footer 字体颜色
 */
@property (nonatomic, strong) UIColor *refreshFooterTextColor;

/**
 * ********************** 以下是调用的方法 **********************
 */
/**
 * 普通的刷新及加载
 */
- (void)addRefreshHeaderWithClosure:(PSRefreshClosure)closure;

- (void)addRefreshFooterWithClosure:(PSRefreshClosure)closure;

/**
 * gif 图刷新及加载（带有状态提示）
 */
- (void)addGifRefreshHeaderWithClosure:(PSRefreshClosure)closure;

- (void)addGifRefreshFooterWithClosure:(PSRefreshClosure)closure;

/**
 * gif 图刷新及加载（不带有状态提示）
 */
- (void)addGifRefreshHeaderNoStatusWithClosure:(PSRefreshClosure)closure;

- (void)addGifRefreshFooterNoStatusWithClosure:(PSRefreshClosure)closure;

/**
 * ****************** 以下三个方法是对上面方法的再次封装 ******************
 */
/**
 * 普通的刷新及加载
 */
- (void)addRefreshHeaderWithClosure:(PSRefreshClosure)headerClosure
  addRefreshFooterWithClosure:(PSRefreshClosure)footerClosure;

/**
 * gif 图刷新及加载（带有状态提示）
 */
- (void)addGifRefreshHeaderWithClosure:(PSRefreshClosure)headerClosure
  addGifRefreshFooterWithClosure:(PSRefreshClosure)footerClosure;

/**
 * gif 图刷新及加载（不带有状态提示）
 */
- (void)addGifRefreshHeaderNoStatusWithClosure:(PSRefreshClosure)headerClosure
  addGifRefreshFooterNoStatusWithClosure:(PSRefreshClosure)footerClosure;

/**
 * 结束刷新
 */
- (void)endRefreshing;

@end

- (void)normalDemo {
 WeakSelf(self)
 [_collectionView addRefreshHeaderWithClosure:^{
  // 刷新操作
  [weakSelf refreshData];
 } addRefreshFooterWithClosure:^{
  // 加载操作
  [weakSelf loadingData];
 }];
}

- (void)normalDemo {
 WeakSelf(self)
 [_collectionView addRefreshHeaderWithClosure:^{
  // 刷新操作
  [weakSelf refreshData];
 }];

 [_collectionView addRefreshFooterWithClosure:^{
  // 加载操作
  [weakSelf loadingData];
 }];
}