Add gradient color fill to circle chart

@@ -75,10 +75,6 @@
         //gradientMask.lineWidth = 4;
         gradientMask.lineWidth    = self.frame.size.width;
         gradientMask.frame = CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height);
-        
-        CGMutablePathRef t = CGPathCreateMutable();
-        CGPathMoveToPoint(t, NULL, 0, 0);
-        CGPathAddLineToPoint(t, NULL, self.bounds.size.width, self.bounds.size.height);
         gradientMask.path = progressline.CGPath;
         
         

@@ -26,6 +26,7 @@ typedef NS_ENUM(NSUInteger, PNChartFormatType) {
 
 @property (strong, nonatomic) UICountingLabel *countingLabel;
 @property (nonatomic) UIColor *strokeColor;
+@property (nonatomic) UIColor *strokeColorGradientStart;
 @property (nonatomic) NSNumber *total;
 @property (nonatomic) NSNumber *current;
 @property (nonatomic) NSNumber *lineWidth;

@@ -101,6 +101,41 @@
     _circle.strokeEnd   = [_current floatValue] / [_total floatValue];
 
     [_countingLabel countFrom:0 to:[_current floatValue] withDuration:1.0];
+    
+    
+    // Check if user wants to add a gradient from the start color to the bar color
+    if (_strokeColorGradientStart) {
+        
+        // Add gradient
+        CAShapeLayer *gradientMask = [CAShapeLayer layer];
+        gradientMask.fillColor = [[UIColor clearColor] CGColor];
+        gradientMask.strokeColor = [[UIColor blackColor] CGColor];
+        gradientMask.lineWidth = _circle.lineWidth;
+        gradientMask.lineCap = kCALineCapRound;
+        CGRect gradientFrame = CGRectMake(0, 0, 2*self.bounds.size.width, 2*self.bounds.size.height);
+        gradientMask.frame = gradientFrame;
+        gradientMask.path = _circle.path;
+        
+        CAGradientLayer *gradientLayer = [CAGradientLayer layer];
+        gradientLayer.startPoint = CGPointMake(0.5,1.0);
+        gradientLayer.endPoint = CGPointMake(0.5,0.0);
+        gradientLayer.frame = gradientFrame;
+        UIColor *endColor = (_strokeColor ? _strokeColor : [UIColor greenColor]);
+        NSArray *colors = @[
+                            (id)endColor.CGColor,
+                            (id)_strokeColorGradientStart.CGColor
+                            ];
+        gradientLayer.colors = colors;
+        
+        [gradientLayer setMask:gradientMask];
+        
+        [_circle addSublayer:gradientLayer];
+        
+        gradientMask.strokeEnd = [_current floatValue] / [_total floatValue];
+        
+        [gradientMask addAnimation:pathAnimation forKey:@"strokeEndAnimation"];
+    }
+
 }
 
 

@@ -147,6 +147,7 @@
         PNCircleChart * circleChart = [[PNCircleChart alloc] initWithFrame:CGRectMake(0, 80.0, SCREEN_WIDTH, 100.0) andTotal:@100 andCurrent:@60 andClockwise:YES andShadow:YES];
         circleChart.backgroundColor = [UIColor clearColor];
         [circleChart setStrokeColor:PNGreen];
+        [circleChart setStrokeColorGradientStart:[UIColor blueColor]];
         [circleChart strokeChart];
         
         [viewController.view addSubview:circleChartLabel];