__*Notice:* There’s a new 2.0 branch where I updated the control for iOS7 plus I plan to do some interesting new features. If people could try it out so I can be sure I didn’t break anything it’d be great, and report any issue you find, I’d really appreciate that :)

ODRefreshControl

ODRefreshControl is a “pull down to refresh” control for UIScrollView, like the one Apple introduced in iOS6, but available to anyone from iOS4 and up.

Installation

Drag the ODRefreshControl/ODRefreshControl folder into your project.
Add the QuartzCore framework to your project.
#import "ODRefreshControl.h"

Important note if your project doesn’t use ARC: you must add the -fobjc-arc compiler flag to ODRefreshControl.m in Target Settings > Build Phases > Compile Sources.

Usage

(see sample Xcode project in /Demo)

Adding a refresh control to your table view

ODRefreshControl *refreshControl = [[ODRefreshControl alloc] initInScrollView:self.scrollView];

To know when the refresh operation has started, add an action method to the UIControlEventValueChanged event of the control

[refreshControl addTarget:self action:@selector(dropViewDidBeginRefreshing:) forControlEvents:UIControlEventValueChanged];

If you’d like to programmatically start the refresh operation, use

[refreshControl beginRefreshing];

Remember to tell the control when the refresh operation has ended

[refreshControl endRefreshing];

Customization

The ODRefreshControl can be customized using the following properties:

@property (nonatomic, strong) UIColor *tintColor;
@property (nonatomic, assign) UIActivityIndicatorViewStyle activityIndicatorViewStyle;
@property (nonatomic, strong) UIColor *activityIndicatorViewColor; // iOS5 or more

Credits