iOS - 根据百分比填充多种颜色的bezierPath

Question

我在Objective-C中绘制了UIBezier路径，并用红色填充它。现在，我想根据百分比用多种颜色填充路径。例如：我想用20％的绿色填充路径，剩下的80％用红色填充（相互之间不是梯度）。我还希望填充和笔画之间有几个像素的间距。

我不知道我该如何完成这些事情。有谁知道我可以如何实现这一点，或者将我指向正确的方向？

非常感谢提前！

UIBezierPath* bezierPath = UIBezierPath.bezierPath; 
[bezierPath moveToPoint: CGPointMake(50, 50)]; 
[bezierPath addLineToPoint: CGPointMake(60, 90)]; 
[bezierPath addLineToPoint: CGPointMake(80, 90)]; 
[bezierPath addLineToPoint: CGPointMake(90, 50)]; 

bezierPath.lineCapStyle = kCGLineCapRound; 
bezierPath.lineJoinStyle = kCGLineJoinBevel; 

[UIColor.redColor setFill]; 
[bezierPath fill]; 
[UIColor.blackColor setStroke]; 
bezierPath.lineWidth = 4; 
[bezierPath stroke]; 

Answer 1

这里是你如何做到这一点，我已经将路径分成5部分，每部分20％。

UIBezierPath* bezierPath = UIBezierPath.bezierPath; 
[bezierPath moveToPoint: CGPointMake(50, 50)]; 
[bezierPath addLineToPoint: CGPointMake(60, 90)]; 
[bezierPath addLineToPoint: CGPointMake(80, 90)]; 
[bezierPath addLineToPoint: CGPointMake(90, 50)]; 

bezierPath.lineCapStyle = kCGLineCapRound; 
bezierPath.lineJoinStyle = kCGLineJoinBevel; 

[UIColor.redColor setFill]; 
bezierPath.lineWidth = 4; 
[bezierPath stroke]; 
[bezierPath addClip]; 

CGRect boundingBox = CGPathGetBoundingBox(bezierPath.CGPath); 

CGRect firstTwentyPercent = CGRectMake(boundingBox.origin.x, 
             boundingBox.origin.y + boundingBox.size.height - 0.2 * boundingBox.size.height, 
             boundingBox.size.width, 
             0.2 * boundingBox.size.height); 
[[UIColor greenColor] setFill]; 
UIRectFill(firstTwentyPercent); 

CGRect secondTwentyPercent = CGRectMake(boundingBox.origin.x, 
             boundingBox.origin.y + boundingBox.size.height - 0.4 * boundingBox.size.height, 
             boundingBox.size.width, 
             0.2 * boundingBox.size.height); 
[[UIColor blueColor] setFill]; 
UIRectFill(secondTwentyPercent); 


CGRect thirdTwentyPercent = CGRectMake(boundingBox.origin.x, 
             boundingBox.origin.y + boundingBox.size.height - 0.6 * boundingBox.size.height, 
             boundingBox.size.width, 
             0.2 * boundingBox.size.height); 
[[UIColor redColor] setFill]; 
UIRectFill(thirdTwentyPercent); 


CGRect fourthTwentyPercent = CGRectMake(boundingBox.origin.x, 
             boundingBox.origin.y + boundingBox.size.height - 0.8 * boundingBox.size.height, 
             boundingBox.size.width, 
             0.2 * boundingBox.size.height); 
[[UIColor cyanColor] setFill]; 
UIRectFill(fourthTwentyPercent); 

CGRect fifthTwentyPercent = CGRectMake(boundingBox.origin.x, 
             boundingBox.origin.y, 
             boundingBox.size.width, 
             0.2 * boundingBox.size.height); 
[[UIColor orangeColor] setFill]; 
UIRectFill(fifthTwentyPercent);