louisdh/bezierpath-length

//
//  BezierView.swift
//  Example
//
//  Created by Louis D'hauwe on 19/11/2016.
//  Copyright © 2016 Silver Fox. All rights reserved.
//

import UIKit
import BezierPathLength

class BezierView: UIView {

    var bezierPath: UIBezierPath? {
        didSet {
            self.setNeedsDisplay()
        }
    }
    
    var focusPercent: CGFloat? {
        didSet {
            self.setNeedsDisplay()
        }
    }
    
    override func draw(_ rect: CGRect) {
            
        guard let path = bezierPath else {
            return
        }
        
        path.lineWidth = 4.0
        path.lineCapStyle = .round
        path.lineJoinStyle = .round
        
        UIColor.red.setStroke()
        
        path.stroke()
        
        if let focusPercent = focusPercent {
            
            if let p = path.point(at: focusPercent) {
            
                let focusSize: CGFloat = 12.0
                
                let ovalRect = CGRect(x: p.x - focusSize/2.0, y: p.y - focusSize/2.0, width: focusSize, height: focusSize)
                let focusPointPath = UIBezierPath(ovalIn: ovalRect)
                UIColor.blue.setFill()
                focusPointPath.fill()
                
            }
            
        }
        
    }

}