PWProgressView is a circular progress indicator inspired by the app install / update animation from iOS 7.
If you use cocoapods add pod 'PWProgressView' to your Podfile and run pod install. Alternatively drag PWProgressView.h and PWProgressView.m into your project file and add the QuartzCore framework.
@property (nonatomic, assign) float progress;The current progress of the progress view. The progress property should be between 0.0 and 1.0.