shape name

ViewController.swift

//
//  ViewController.swift
//  ShapeName
//
//  Created by Mizushima Yusuke on 9/22/15.
//  Copyright © 2015 Yusuke Mizusima. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    enum Shape : String {
        case Rectangle = "しかく", Triangle = "さんかく", Circle = "まる"
    }
    
    let positions = [CGPoint(x:120, y:140), CGPoint(x:250, y:250), CGPoint(x: 100, y: 350)]
    var answer : Shape?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.brownColor()
        createGrass()
        createStartButton()
    }

    func createGrass() {
        let makeGrass = {() -> UIView in
            let n = UIView()
            for i in 0...10 {
                let g = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 50))
                g.layer.anchorPoint = CGPoint(x: 0.5, y: 1)
                g.layer.position = CGPoint(x: i * 8, y: 0)
                
                let bright = CGFloat(arc4random() % 5) * 0.1 + 0.5
                g.layer.backgroundColor = UIColor(hue: 0.25, saturation: 0.8, brightness: bright, alpha: 0.9).CGColor
                g.layer.transform = CATransform3DMakeRotation(CGFloat(M_PI) * 0.02 * CGFloat(i) - CGFloat(M_PI * 0.1), 0, 0, 1)
                n.addSubview(g)
            }
            n.userInteractionEnabled = false
            n.layer.zPosition = 100
            return n
        }
        
        for p in positions {
            let grass = makeGrass()
            grass.center = p
            view.addSubview(grass)
        }
    }
    
    func createStartButton() {
        let btn = UIButton(type: .System)
        btn.setTitle("START", forState: .Normal)
        btn.titleLabel?.font = UIFont.boldSystemFontOfSize(30)
        btn.setTitleColor(UIColor.whiteColor(), forState: .Normal)
        btn.sizeToFit()
        btn.center = CGPoint(x: CGRectGetMaxX(view.bounds) - 100, y: CGRectGetMaxY(view.bounds) - 100)
        view.addSubview(btn)
        
        btn.addTarget(self, action: "start", forControlEvents: .TouchUpInside)
    }
    
    func start() {
        
        clear()
        let shapes : [Shape] = [.Rectangle, .Triangle, .Circle]
        
        answer = shapes[Int(arc4random() % 3)]
        
        let targetShape = shape(answer!, color: UIColor.whiteColor())
        targetShape.tag = 1
        targetShape.center = CGPoint(x: CGRectGetMidX(view.bounds), y: 480)
        targetShape.transform = CGAffineTransformMakeScale(0, 0)
        view.addSubview(targetShape)
        UIView.animateWithDuration(0.3) { () -> Void in
            targetShape.transform = CGAffineTransformIdentity
        }
        
        for i in 0...2 {
            let tx = UILabel()
            tx.userInteractionEnabled = true
            tx.text = shapes[i].rawValue
            tx.tag = 2
            tx.backgroundColor = UIColor.clearColor()
            tx.font = UIFont.boldSystemFontOfSize(30)
            tx.textColor = UIColor.whiteColor()
            tx.layer.anchorPoint = CGPoint(x: 0.2, y: 1.0)
            tx.sizeToFit()
            tx.center = positions[i]
            tx.transform = CGAffineTransformMakeTranslation(0, -800)
            view.addSubview(tx)
            
            UIView.animateWithDuration(0.5, animations: { () -> Void in
                tx.transform = CGAffineTransformIdentity
            })
        }
    }
    
    func clear() {
        self.view.subviews.forEach { (v:UIView) -> () in
            if v.tag >= 1 { v.removeFromSuperview() }
        }
    }
    
    func shape(type:Shape, color:UIColor) -> UIView {
        
        let rectView = UIView(frame: CGRectMake(-40, -40, 80, 80))
        rectView.backgroundColor = color
        
        let tri = UIView()
        let path = UIBezierPath()
        path.moveToPoint(CGPoint(x: -40, y: 40))
        path.addLineToPoint(CGPoint(x: 0, y: -40))
        path.addLineToPoint(CGPoint(x: 40, y: 40))
        path.closePath()
        let l = CAShapeLayer()
        l.path = path.CGPath
        l.fillColor = color.CGColor
        tri.layer.addSublayer(l)
        
        let circle = UIView(frame: CGRectMake(-40, -40, 80, 80))
        circle.layer.cornerRadius = 40
        circle.backgroundColor = color
        
        switch type {
        case .Rectangle: return rectView
        case .Triangle: return tri
        case .Circle: return circle
        }
    }
    
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if let touch = touches.first {
            let p = touch.locationInView(view)
            if let hit = view.hitTest(p, withEvent: nil) {
                if hit.tag == 2 {
                    UIView.animateWithDuration(0.3, animations: { () -> Void in
                        hit.transform = CGAffineTransformMakeTranslation(0, -50)
                        }, completion: { (Bool) -> Void in
                            UIView.animateWithDuration(0.7, delay: 0.8, options: .CurveEaseInOut, animations: { () -> Void in
                                hit.transform = CGAffineTransformIdentity
                                }, completion: {(Bool) -> Void in
                                
                                    if (hit as! UILabel).text == self.answer!.rawValue {
                                        self.start()
                                    }
                            })
                    })
                }
            }
        }
    }
    
}

http://lepetit-prince.net/ios/?p=4380