SVPullToRefresh

The library allows adding pull-to-refresh or infinite scrolling with a single method call, such as `[tableView addPullToRefreshWithActionHandler:^{}]`, drastically reducing boilerplate code as shown in the README.

It supports pull-to-refresh from both top and bottom positions, enabling versatile scrolling interactions as demonstrated in the README with the `position:SVPullToRefreshPositionBottom` parameter.

Developers can customize arrow colors, text colors, activity indicators, and even set custom views for different states, providing full control over the UI without sacrificing simplicity, detailed in the README's customization section.

Using Objective-C runtime categories, it adds methods directly to UIScrollView, eliminating the need for delegate methods or subclassing UIViewController, as emphasized in the project's philosophy.