iOS - 根據百分比填充多種顏色的bezierPath

Question

我在Objective-C中繪製了UIBezier路徑，並用紅色填充它。現在，我想根據百分比用多種顏色填充路徑。例如：我想用20％的綠色填充路徑，剩下的80％用紅色填充（相互之間不是梯度）。我還希望填充和筆畫之間有幾個像素的間距。

我不知道我該如何完成這些事情。有誰知道我可以如何實現這一點，或者將我指向正確的方向？

非常感謝提前！

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

這裏是你如何做到這一點，我已經將路徑分成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);