UIImageは、私が怒鳴る画像のようにUIBezierPathの最後の時点でUIImageを追加したいUIBezierPath

Question

の最後の時点で：

Circle Path

コード：

let consume = 0.25 
let x = self.frame.size.width/2.0 
let y = self.frame.size.height/2.0 
let radius = (frame.size.width - 10)/2.0 
let startAngle: CGFloat = CGFloat(M_PI * (-1/2)) 
let endAngle = CGFloat(M_PI * 2 - M_PI/2 * consume) 
let circlePath = UIBezierPath(arcCenter: CGPoint(x: x, y: y), radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: false) 

circleLayer = CAShapeLayer() 
circleLayer.path = circlePath.cgPath 
circleLayer.fillColor = UIColor.clear.cgColor 
circleLayer.strokeColor = UIColor.red.cgColor 
circleLayer.lineWidth = 8.0; 

let image = UIImage(named: "myCoolImage") 
let imageView = UIImageView(image: image) 
// coordX and coordY must be at last point of UIBezierPath 
imageView.frame = CGRect(x: coordX, y: coordY, width: 20.0, height: 20.0) 
self.addSubview(imageView) 

私は次のことを試してみました：

let coordX: CGFloat = cos(endAngle) * radius 
let coordY: CGFloat = sin(endAngle) * radius 

結果： Positive coordX and coordY

主な問題は、coordXとcoordYを計算する方法です。

Answer 1

実際に完全に答えを出すために、ここには基本的に必要なものがあります。

let consume = 0.25 
let x = self.frame.size.width/2.0 
let y = self.frame.size.height/2.0 
let radius = (frame.size.width - 10)/2.0 
let startAngle: CGFloat = CGFloat(M_PI * (-1/2)) 
let endAngle = CGFloat(M_PI * 2 - M_PI/2 * consume) 
let circlePath = UIBezierPath(arcCenter: CGPoint(x: x, y: y), radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: false) 

circleLayer = CAShapeLayer() 
circleLayer.path = circlePath.cgPath 
circleLayer.fillColor = UIColor.clear.cgColor 
circleLayer.strokeColor = UIColor.red.cgColor 
circleLayer.lineWidth = 8.0; 

let imageSize = 20.0 
// Center + cos/sin(angle) * radius, then subtract half 
// the image size so it will be centered on the line 
let coordX: CGFloat = x + (cos(endAngle) * radius) - (imageSize/2.0) 
let coordY: CGFloat = y - (sin(endAngle) * radius) - (imageSize/2.0) 

let image = UIImage(named: "myCoolImage") 
let imageView = UIImageView(image: image) 
// coordX and coordY must be at last point of UIBezierPath 
imageView.frame = CGRect(x: coordX, y: coordY, width: imageSize, height: imageSize) 
self.addSubview(imageView)