Swift: Layer hit-testing

gistfile1.txt

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        
        var blueLayer = CALayer()
        blueLayer.frame = CGRectMake(100, 100, 100, 100)
        blueLayer.backgroundColor = UIColor.blueColor().CGColor
        blueLayer.name = "Blue"
        self.view.layer.addSublayer(blueLayer)
            
        var redLayer = CALayer()
        redLayer.frame = CGRectMake(200, 200, 100, 100)
        redLayer.backgroundColor = UIColor.redColor().CGColor
        redLayer.name="Red"
        self.view.layer.addSublayer(redLayer)
            
        var yellowLayer = CALayer()
        yellowLayer.frame = CGRectMake(300, 300, 100, 100)
        yellowLayer.backgroundColor = UIColor.yellowColor().CGColor
        yellowLayer.name = "Yellow"
        self.view.layer.addSublayer(yellowLayer)
            
        var greenLayer = CALayer()
        greenLayer.frame = CGRectMake(400, 400, 100, 100)
        greenLayer.backgroundColor = UIColor.greenColor().CGColor
        greenLayer.name="Green"
        self.view.layer.addSublayer(greenLayer)
            
            
        
    }
    
    override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
        if let touch: AnyObject = touches.anyObject() {
            let location = touch.locationInView(self.view)
            let point = self.view.convertPoint(location, fromView:nil)
            if let hitLayer = self.view.layer.hitTest(point) {
            if let name = hitLayer.name {
            displayInfo(hitLayer.name)
            }
            }
}


      
        
    }
    func displayInfo(name:String) {
        println(name)
    }
  


}