louisdh/bezierpath-length

//
//  ViewController.swift
//  Example
//
//  Created by Louis D'hauwe on 18/11/2016.
//  Copyright © 2016 Silver Fox. All rights reserved.
//

import UIKit
import BezierPathLength

class ViewController: UIViewController {

    lazy var paths: [String : UIBezierPath] = {
        
        let rect =  CGRect(x: 0, y: 0, width: 288, height: 288)

        let linePath = UIBezierPath()
        linePath.move(to: CGPoint(x: 100, y: 100))
        linePath.addLine(to: CGPoint(x: 200, y: 250))
        
        let circlePath = UIBezierPath(ovalIn: rect.insetBy(dx: 8.0, dy: 8.0))
        
        let roundedPath = UIBezierPath(roundedRect: rect.insetBy(dx: 8.0, dy: 8.0), cornerRadius: 16.0)
        
        let loopPath = UIBezierPath()

        loopPath.move(to: CGPoint(x: 100, y: 100))
        loopPath.addQuadCurve(to: CGPoint(x: 140, y: 20), controlPoint: CGPoint(x: 150, y: 200))
        loopPath.addQuadCurve(to: CGPoint(x: 240, y: 120), controlPoint: CGPoint(x: 50, y: 300))
        
        
        let starPath = UIBezierPath()
        starPath.move(to: CGPoint(x: 144, y: 17.72))
        starPath.addLine(to: CGPoint(x: 191.52, y: 87.06))
        starPath.addLine(to: CGPoint(x: 272.15, y: 110.83))
        starPath.addLine(to: CGPoint(x: 220.89, y: 177.45))
        starPath.addLine(to: CGPoint(x: 223.2, y: 261.48))
        starPath.addLine(to: CGPoint(x: 144, y: 233.32))
        starPath.addLine(to: CGPoint(x: 64.8, y: 261.48))
        starPath.addLine(to: CGPoint(x: 67.11, y: 177.45))
        starPath.addLine(to: CGPoint(x: 15.85, y: 110.83))
        starPath.addLine(to: CGPoint(x: 96.48, y: 87.06))
        starPath.addLine(to: CGPoint(x: 144, y: 17.72))

        
        let spiralPath = UIBezierPath()
        spiralPath.move(to: CGPoint(x: 253.5, y: 179))
        spiralPath.addCurve(to: CGPoint(x: 131.53, y: 57.4), controlPoint1: CGPoint(x: 253.5, y: 111.88), controlPoint2: CGPoint(x: 198.9, y: 57.4))
        spiralPath.addCurve(to: CGPoint(x: 34, y: 154.68), controlPoint1: CGPoint(x: 77.65, y: 57.4), controlPoint2: CGPoint(x: 34, y: 100.96))
        spiralPath.addCurve(to: CGPoint(x: 112.05, y: 232.5), controlPoint1: CGPoint(x: 34, y: 197.67), controlPoint2: CGPoint(x: 68.94, y: 232.5))
        spiralPath.addCurve(to: CGPoint(x: 174.51, y: 170.23), controlPoint1: CGPoint(x: 146.54, y: 232.5), controlPoint2: CGPoint(x: 174.51, y: 204.62))
        spiralPath.addCurve(to: CGPoint(x: 124.56, y: 120.43), controlPoint1: CGPoint(x: 174.51, y: 142.75), controlPoint2: CGPoint(x: 152.13, y: 120.43))
        spiralPath.addCurve(to: CGPoint(x: 84.62, y: 160.25), controlPoint1: CGPoint(x: 102.49, y: 120.43), controlPoint2: CGPoint(x: 84.62, y: 138.25))
        spiralPath.addCurve(to: CGPoint(x: 116.61, y: 192.14), controlPoint1: CGPoint(x: 84.62, y: 177.85), controlPoint2: CGPoint(x: 98.92, y: 192.14))
        spiralPath.addCurve(to: CGPoint(x: 142.16, y: 166.66), controlPoint1: CGPoint(x: 130.73, y: 192.14), controlPoint2: CGPoint(x: 142.16, y: 180.74))
        spiralPath.addCurve(to: CGPoint(x: 121.7, y: 146.26), controlPoint1: CGPoint(x: 142.16, y: 155.4), controlPoint2: CGPoint(x: 133.01, y: 146.26))
        spiralPath.addCurve(to: CGPoint(x: 105.35, y: 162.57), controlPoint1: CGPoint(x: 112.68, y: 146.26), controlPoint2: CGPoint(x: 105.35, y: 153.57))
        
        
        let infinityPath = UIBezierPath()
        infinityPath.move(to: CGPoint(x: 136.72, y: 145.64))
        infinityPath.addCurve(to: CGPoint(x: 269.5, y: 147.17), controlPoint1: CGPoint(x: 234.75, y: 101.55), controlPoint2: CGPoint(x: 269.5, y: 114.89))
        infinityPath.addCurve(to: CGPoint(x: 140.53, y: 143.56), controlPoint1: CGPoint(x: 269.5, y: 194.23), controlPoint2: CGPoint(x: 172.12, y: 161.79))
        infinityPath.addCurve(to: CGPoint(x: 16.9, y: 147.17), controlPoint1: CGPoint(x: 110.07, y: 125.97), controlPoint2: CGPoint(x: 16.9, y: 95.77))
        infinityPath.addCurve(to: CGPoint(x: 136.72, y: 145.64), controlPoint1: CGPoint(x: 16.9, y: 167.57), controlPoint2: CGPoint(x: 37.72, y: 190.22))


        
        return ["Line" : linePath,
                "Circle" : circlePath,
                "Rounded Rect" : roundedPath,
                "Quadratic Loop" : loopPath,
                "Star" : starPath,
                "Spiral" : spiralPath,
                "Infinity" : infinityPath]
        
    }()
    
    @IBOutlet weak var lengthLbl: UILabel!
    
    @IBOutlet weak var percentageLbl: UILabel!
    @IBOutlet weak var bezierView: BezierView!
    
    @IBOutlet weak var pathPickerBtn: UIButton!
    
    @IBOutlet weak var percentageSlider: UISlider!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        if let (name, path) = paths.first {
        
            pathPickerBtn.setTitle(name, for: .normal)
            
            bezierView.bezierPath = path
            
            update()
            
        }

    }
    
    @IBAction func pickPath(_ sender: UIButton) {
        
        let alertController = UIAlertController(title: "Pick a path", message: nil, preferredStyle: .actionSheet)
        
        for (name, path) in paths {
            
            let action = UIAlertAction(title: name, style: .default, handler: { (action) in
                
                self.pathPickerBtn.setTitle(name, for: .normal)
                self.bezierView.bezierPath = path
                self.update()
                
            })
            
            alertController.addAction(action)
        }
        
        self.present(alertController, animated: true, completion: nil)
        
    }
    
    @IBAction func didChangeSliderValue(_ sender: UISlider) {
        
        update()
    }
    
    fileprivate func update() {
        
        percentageLbl.text = String(format: "%.2f", percentageSlider.value)
        
        if let length = bezierView.bezierPath?.length {
            lengthLbl.text = "\(String(format: "%.2f", length)) pt"
        } else {
            lengthLbl.text = ""
        }
        
        bezierView.focusPercent = CGFloat(percentageSlider.value)
        
    }

}