How I created MBCircularProgressBar

@import UIKit;

IB_DESIGNABLE
@interface MBCircularProgressBarView : UIView

@property (nonatomic,assign) IBInspectable CGFloat value;
@property (nonatomic,assign) IBInspectable CGFloat maxValue;
@property (nonatomic,assign) IBInspectable CGFloat valueFontSize;
@property (nonatomic,assign) IBInspectable CGFloat unitFontSize;
@property (nonatomic,copy) IBInspectable NSString* unitString;
@property (nonatomic,strong) IBInspectable UIColor* fontColor;
@property (nonatomic,assign) IBInspectable CGFloat progressRotationAngle;
@property (nonatomic,assign) IBInspectable CGFloat progressAngle;
@property (nonatomic,assign) IBInspectable CGFloat progressLineWidth;
@property (nonatomic,strong) IBInspectable UIColor* progressColor;
@property (nonatomic,strong) IBInspectable UIColor* progressStrokeColor;

//CGLineCap
@property (nonatomic,assign) IBInspectable NSInteger progressCapType;
@property (nonatomic,assign) IBInspectable CGFloat emptyLineWidth;
@property (nonatomic,strong) IBInspectable UIColor* emptyLineColor;

//CGLineCap
@property (nonatomic,assign) IBInspectable NSInteger emptyCapType;

@end