作業-運用 UIBezierPath 繪製圖案

以直線來說，座標比較沒問題，但是畫曲線的話座標就變頑皮，跑進playground會走鐘。因為要呈現完美曲線，光座標位置就調整了好幾次，難怪黑盒子就算有座標，掉進海裡再加上有多項變數，也變得不好找了……

import UIKit
var rect = CGRect(x:0,y:0,width:499,height:499)
let rectBackground = UIView(frame: rect)
rectBackground.backgroundColor = UIColor(red:234/55, green: 0, blue: 0, alpha: 1)
let image = UIImage(named: “m”)
let imageView = UIImageView(image : image)
let backgroundView = UIImageView(frame: imageView.frame)
let mView = UIView(frame: CGRect(x: 0, y: 0, width: 499, height: 499))
let mColor = UIColor(red: 255/255, green: 195/255, blue: 0, alpha: 1)
mView.backgroundColor = mColor
let mPath = UIBezierPath()
mPath.move(to: CGPoint(x: 109, y: 399)) 
mPath.addCurve(to: CGPoint(x: 256, y: 255), controlPoint1: CGPoint(x: 109, y: 229), controlPoint2: CGPoint(x: 182, y: 90))
mPath.addCurve(to: CGPoint(x: 403, y: 399), controlPoint1: CGPoint(x: 329, y: 90), controlPoint2: CGPoint(x: 407, y: 229))
mPath.addLine(to: CGPoint(x: 371,y:399))
mPath.addCurve(to: CGPoint(x: 271, y: 377), controlPoint1: CGPoint(x: 372, y: 240), controlPoint2: CGPoint(x: 306, y: 50))
mPath.addLine(to: CGPoint(x: 245,y:377))
mPath.addCurve(to: CGPoint(x: 141, y: 399), controlPoint1: CGPoint(x: 205, y: 50), controlPoint2: CGPoint(x: 142, y: 240))
mPath.close()
let mShape = CAShapeLayer()
mShape.path = mPath.cgPath
mView.layer.mask = mShape
mView
backgroundView
rectBackground.addSubview(mView)