@interface SSTCircleProgressView : UIView 
/**
 *進度條的角的類型
 */
@property (nonatomic,copy) CAShapeLayerLineCap lineCap;
 
/**
 *進度條顯示的文字
 */
@property (nonatomic,copy) NSString *progressLabelText;
 
/**
 *進度條顯示的文字的顏色
 */
@property (nonatomic,copy) UIColor *progressLabelTextColor;
 
/**
 *進度條寬度
 */
@property (nonatomic,assign) CGFloat progressLineWidth;
/**
 * 背景線條寬度
 */
@property (nonatomic,assign) CGFloat backgroundLineWidth;
/**
 * 進度百分比
 */
@property (nonatomic,assign) CGFloat percentage;
/**
 * 背景填充顏色
 */
@property (nonatomic,strong) UIColor *backgroundStrokeColor;
/**
 * 進度條填充顏色
 */
@property (nonatomic,strong) UIColor *progressStrokeColor;
/**
 * 距離邊框邊距偏移量
 */
@property (nonatomic,assign) CGFloat offset;
 
- (void)setProgress:(CGFloat)percentage animated:(BOOL)animated;
 
@end

#import "SSTCircleProgressView.h"
 
#define kDuration 1.0
#define kDefaultLineWidth 10
 
@interface SSTCircleProgressView()
 
@property (nonatomic,strong) CAShapeLayer *backgroundLayer;
@property (nonatomic,strong) CAShapeLayer *progressLayer;
@property (nonatomic,strong) UILabel *progressLabel;
@property (nonatomic,strong) NSTimer *timer;
@property (nonatomic,assign) CGFloat startAngle ; // M_PI*2
@property (nonatomic,assign) CGFloat endAngle ;
 
@end
 
@implementation SSTCircleProgressView
 
- (instancetype)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
  if (self) {
    [self setBackgroundColor:[UIColor clearColor]];
    [self createSubViews];
    //init default variable
    self.backgroundLineWidth = kDefaultLineWidth;
    self.progressLineWidth = kDefaultLineWidth;
    self.percentage = 0;
    self.offset = 0;
    self.startAngle = -M_PI_2;
    self.endAngle = 0;
  }
  return self;
}
 
- (void)createSubViews
{
  //self.progressLabel.text = @"0%";
  self.progressLabel.textAlignment = NSTextAlignmentCenter;
  self.progressLabel.font = FONTBOLD(12);
  [self addSubview:self.progressLabel];
  
  _backgroundLayer = [CAShapeLayer layer];
  _backgroundLayer.frame = self.bounds;
  _backgroundLayer.fillColor = nil;
  _backgroundLayer.strokeColor = [UIColor lightGrayColor].CGColor;
  
  _progressLayer = [CAShapeLayer layer];
  _progressLayer.frame = self.bounds;
  _progressLayer.fillColor = nil;
  _progressLayer.strokeColor = [UIColor redColor].CGColor;
  
  [self.layer addSublayer:_backgroundLayer];
  [self.layer addSublayer:_progressLayer];
}
 
-(void)setProgressLabelText:(NSString *)progressLabelText{
  _progressLabelText = progressLabelText;
  self.progressLabel.text = progressLabelText;
}
 
-(void)setProgressLabelTextColor:(UIColor *)progressLabelTextColor{
  _progressLabelTextColor = progressLabelTextColor;
  self.progressLabel.textColor = progressLabelTextColor;
}
 
 
#pragma mark - Draw CircleLine
- (void)setBackgroundCircleLine
{
  UIBezierPath *path = [UIBezierPath bezierPath];
  path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(self.center.x - self.frame.origin.x, self.center.y - self.frame.origin.y)
                     radius:(self.frame.size.width - _backgroundLineWidth)/2 - _offset
                   startAngle:self.startAngle
                    endAngle:self.endAngle
                    clockwise:NO];
  _backgroundLayer.path = path.CGPath;
}
 
- (void)setProgressCircleLine
{
  UIBezierPath *path = [UIBezierPath bezierPath];
  path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(self.center.x - self.frame.origin.x, self.center.y - self.frame.origin.y)
                     radius:(self.frame.size.width - _progressLineWidth)/2 - _offset
                   startAngle:self.startAngle
                    endAngle:self.endAngle
                    clockwise:NO];
  _progressLayer.path = path.CGPath;
}
 
#pragma mark - Lazy Load
- (UILabel *)progressLabel
{
  if (!_progressLabel) {
    _progressLabel = [[UILabel alloc]initWithFrame:CGRectMake((self.bounds.size.width -100)/2, (self.bounds.size.height - 100)/2, 100, 100)];
  }
  return _progressLabel;
}
 
- (void)setBackgroundLineWidth:(CGFloat)backgroundLineWidth
{
  _backgroundLineWidth = backgroundLineWidth;
  _backgroundLayer.lineWidth = _backgroundLineWidth;
  [self setBackgroundCircleLine];
}
 
-(void)setLineCap:(CAShapeLayerLineCap)lineCap{
  _progressLayer.lineCap = lineCap;
  [self setProgressCircleLine];
}
 
- (void)setProgressLineWidth:(CGFloat)progressLineWidth
{
  _progressLineWidth = progressLineWidth;
  _progressLayer.lineWidth = _progressLineWidth;
  [self setProgressCircleLine];
}
 
- (void)setPercentage:(CGFloat)percentage {
  _percentage = percentage;
}
 
- (void)setBackgroundStrokeColor:(UIColor *)backgroundStrokeColor {
  _backgroundStrokeColor = backgroundStrokeColor;
  _backgroundLayer.strokeColor = _backgroundStrokeColor.CGColor;
}
 
- (void)setProgressStrokeColor:(UIColor *)progressStrokeColor
{
  _progressStrokeColor = progressStrokeColor;
  _progressLayer.strokeColor = _progressStrokeColor.CGColor;
}
 
#pragma mark - progress animated YES or NO
- (void)setProgress:(CGFloat)percentage animated:(BOOL)animated
{
  self.percentage = percentage;
  _progressLayer.strokeEnd = _percentage;
  if (animated) {
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    animation.fromValue = [NSNumber numberWithFloat:0.0];
    animation.toValue = [NSNumber numberWithFloat:_percentage];
    animation.duration = kDuration;
    [_progressLayer addAnimation:animation forKey:@"strokeEndAnimation"];
  }else{
    [CATransaction begin];
    [CATransaction setDisableActions:YES];
    _progressLabel.text = [NSString stringWithFormat:@"%.0f%%",_percentage*100];
    [CATransaction commit];
  }
}