Bouncing Labels using swift - Animation, physics

ViewController.swift

//
//  ViewController.swift
//  Bouncing Labels
//
//  Created by Ranjith Nagella on 10/6/14.
//  Copyright (c) 2014 Ranjith Nagella. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    // create ivars
    var firstLabel: UILabel!
    var iPhoneLable: UILabel!
    var myView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        firstLabel = UILabel()
        iPhoneLable = UILabel()
        
        addLabels()
        
        // myView = UIView()
        // myView.backgroundColor = UIColor.yellowColor()
        //        myView.center = CGPoint(x: 0, y:0)
        
        // Where is the (0,0) coordinate in terms of the iPhone screen
        // The origin is specified at top left corner and extends x and y towards down and right corners.
        
        // myView.bounds = CGRect(x: 0, y: 0, width: view.bounds.width, height: view.bounds.height)
        // view.addSubview(myView)
        view.backgroundColor = UIColor.yellowColor()
        println(view.bounds.size.height) // 667.0
        println(view.bounds.size.width) // 375.0
        view.backgroundColor = UIColor.redColor()
        
        // How bing is the iPhone screen in pixels
        // It's 667 px interms of height and 375px interms of width
        
        
        view.bounds = CGRect(x: 0, y: 0, width: view.bounds.size.width, height: view.bounds.size.height)
//        view.bounds.width = view.bounds.size.width
        
        
        var tapGesture = UITapGestureRecognizer(target: self, action: Selector("handelGesture:"))
        view.addGestureRecognizer(tapGesture)
        
    }
    
    func handelGesture(tapGesture: UITapGestureRecognizer) {
        
        // println("Tap")
        addLabels()
    }
    
    var springness = CGFloat(0.9)
    
    func addLabels() {
        
        firstLabel.text = "My First"
        firstLabel.font = UIFont.systemFontOfSize(36)
        firstLabel.sizeToFit()
        firstLabel.center = CGPoint(x: 100, y: 40)
        
        view.addSubview(firstLabel)
    
        
        
        UIView.animateWithDuration(0.5, delay: 0, usingSpringWithDamping: springness, initialSpringVelocity: 0.0, options: nil, animations: {
            
            self.firstLabel.center = CGPoint(x: 100, y: 40 + 100);
            if (self.springness >= 0.1) {
                println("true")
                //println(CGFloat(self.springness) >= CGFloat(0.1))
                println(self.springness)
                self.springness = CGFloat(self.springness - 0.1)
            } else {
                println("entered else")
                self.springness = CGFloat(0.9)
            }
            
            }, completion: nil)
    
        iPhoneLable.center = CGPoint(x: 280, y: 180)
        iPhoneLable.text = "iPhone App"
        iPhoneLable.font = UIFont.boldSystemFontOfSize(36)
        iPhoneLable.sizeToFit()
        iPhoneLable.alpha = 0
        
        UIView.animateWithDuration(0.5, delay: 0, options: UIViewAnimationOptions.TransitionFlipFromRight, animations: {
            self.iPhoneLable.center = CGPoint(x: 160, y: 180)
            self.iPhoneLable.alpha = 1
            }, completion: nil)
        
        
        
        
    
        
        view.addSubview(iPhoneLable)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}