drawLines
func drawLines() {
guard let ctx = UIGraphicsGetCurrentContext() else {
return
}
ctx.beginPath()
ctx.move(to: CGPoint(x: 20, y: 20))
ctx.addLine(to: CGPoint(x: 250, y: 100))
ctx.addLine(to: CGPoint(x: 100, y: 200))
ctx.setLineWidth(5)
ctx.closePath()
ctx.strokePath()
}
drawRectangle
func drawRectangle() {
let center = CGPoint(x: self.frame.size.width / 2, y: self.frame.size.height / 2)
let rectangleWidth: CGFloat = 100
let rectangleHeight: CGFloat = 100
guard let ctx = UIGraphicsGetCurrentContext() else { return }
ctx.addRect(CGRect(x: center.x - (0.5 * rectangleWidth), y: center.y - (0.5 * rectangleHeight), width: rectangleWidth, height: rectangleHeight))
ctx.setLineWidth(10)
ctx.setStrokeColor(UIColor.gray.cgColor)
ctx.strokePath()
ctx.setFillColor(UIColor.green.cgColor)
ctx.addRect(CGRect(x: center.x - (0.5 * rectangleWidth), y: center.y - (0.5 * rectangleHeight), width: rectangleWidth, height: rectangleHeight))
ctx.fillPath()
}
drawCircle
func drawCircle() {
let center = CGPoint(x: self.frame.size.width / 2, y: self.frame.size.height / 2)
guard let ctx = UIGraphicsGetCurrentContext() else { return }
ctx.beginPath()
ctx.setLineWidth(5)
let x: CGFloat = center.x
let y: CGFloat = center.y
let radius: CGFloat = 100
let endAngle: CGFloat = CGFloat(2 * M_PI)
ctx.addArc(center: CGPoint(x: x,y: y), radius: radius, startAngle: 0, endAngle: endAngle, clockwise: true)
ctx.strokePath()
}
