Circular progress bar in iOS

Friday, I meet the some problem. My boss want to add circular progress bar in one of the project. I thought, it may done by somebody. I found circular progress bar on MBProgressHUB. However, it have combining some other class. So, I extract only circular progress. Check the code below

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#import <UIKit/UIKit.h>

@interface MBRoundProgressView : UIView
- (void)setProgress:(float)progress;
- (float)progress;
@end