Category for UIScrollView class, that adds bottomRefreshControl property, that could be assigned to UIRefreshControl class instance. It implements an ability to add native iOS bottom pull-up to refresh control to UITableView or UICollectionView. Perfectly works with top top refresh control (see example project). Very useful for refreshing table and collection views that contain most recent items at the bottom. For example in chats.

CocoaPods is the recommended way to add CCBottomRefreshControl to your project.

Here's an example podfile that installs CCBottomRefreshControl.

platform :ios, '7.0'

pod 'CCBottomRefreshControl'

Create an ordinary UIRefreshControl class instance, and assign additional UITableView/UICollectionView property bottomRefreshControl to it.

Additional triggerVerticalOffset property in UIRefreshControl class allows you to specify a vertical offset, after reaching which refresh will be triggered. Default value is 120.

#import <CCBottomRefreshControl/UIScrollView+BottomRefreshControl.h>

...

UIRefreshControl *refreshControl = [UIRefreshControl new];
refreshControl.triggerVerticalOffset = 100.;
[refreshControl addTarget:self action:@selector(refresh) forControlEvents:UIControlEventValueChanged];
self.tableView.bottomRefreshControl = refreshControl;

- (void)refresh {
    // Do refresh stuff here
}

CCBottomRefreshControl is released under the MIT license. See LICENSE