Core Animation Example

animation6-13.swift

//
//  ViewController.swift
//  animation613
//
//  Created by Sunny Cheung on 23/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    @IBOutlet var containerView:UIView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // create particle emitter layer
        var emitter:CAEmitterLayer = CAEmitterLayer()
        emitter.frame = self.containerView!.bounds
        self.containerView!.layer.addSublayer(emitter)
        
        // configure emitter
        emitter.renderMode = kCAEmitterLayerAdditive
        emitter.emitterPosition = CGPointMake(emitter.frame.size.width / 2.0, emitter.frame.size.height / 2.0)
        
        // create a particle template
        var cell:CAEmitterCell = CAEmitterCell()
        cell.contents = UIImage(named: "Spark.png")!.CGImage
        cell.birthRate = 150
        cell.lifetime = 5.0
        cell.color = UIColor(red: 1, green: 0.5, blue: 0.1, alpha: 1.0).CGColor
        
        cell.alphaSpeed = -0.4
        cell.velocity = 50
        cell.velocityRange = 50
        cell.emissionRange = CGFloat(M_PI * 2.0)
        
        emitter.emitterCells = [cell]
        
        
    }

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


}

animation6-14.swift

//
//  ViewController.swift
//  animation614
//
//  Created by Sunny Cheung on 23/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import QuartzCore
import GLKit
import OpenGLES


class ViewController: UIViewController {
    
    @IBOutlet var glView:UIView!
    var glContext:EAGLContext!
    var glLayer:CAEAGLLayer!
    var framebuffer:GLuint = GLuint()
    var colorRenderbuffer:GLuint = GLuint()
    
    var framebufferWidth:GLint = GLint()
    
    var framebufferHeight:GLint  = GLint()
    
    var effect:GLKBaseEffect!
    
    func setUpBuffers() {
        // setup frame buffer
         glGenFramebuffers(1, &self.framebuffer)
        glBindFramebuffer(GLuint(GL_FRAMEBUFFER),self.framebuffer)
       
        // setup color render buffer
        glGenRenderbuffers(1, &self.colorRenderbuffer)
        glBindRenderbuffer(GLuint(GL_RENDERBUFFER), self.colorRenderbuffer)
        glFramebufferRenderbuffer(GLuint(GL_FRAMEBUFFER),
            GLuint(GL_COLOR_ATTACHMENT0),
            GLuint(GL_RENDERBUFFER),
            self.colorRenderbuffer)
        self.glContext.renderbufferStorage(Int(GL_RENDERBUFFER), fromDrawable: self.glLayer!)
        glGetRenderbufferParameteriv(GLuint(GL_RENDERBUFFER), GLuint(GL_RENDERBUFFER_WIDTH), &self.framebufferWidth)
        glGetRenderbufferParameteriv(GLuint(GL_RENDERBUFFER), GLuint(GL_RENDERBUFFER_HEIGHT), &self.framebufferHeight)
        
        if (glCheckFramebufferStatus(GLuint(GL_FRAMEBUFFER)) != GLuint(GL_FRAMEBUFFER_COMPLETE)) {
            NSLog("Fail to make framebuffer object %i", glCheckFramebufferStatus(GLuint(GL_FRAMEBUFFER)))
        }
        
    }
    
    func tearDownBuffers() {
        if (self.framebuffer == 0) {
            glDeleteBuffers(1, &self.framebuffer)
            self.framebuffer = 0
        }
        
        if (self.colorRenderbuffer == 0) {
            glDeleteBuffers(1, &self.colorRenderbuffer)
            self.colorRenderbuffer = 0
        }
        
    }
    
    func drawFrame() {
        glBindFramebuffer(GLuint(GL_FRAMEBUFFER), self.framebuffer)
        glViewport(0, 0, self.framebufferWidth, self.framebufferHeight)
        
        // bind shader program
        self.effect.prepareToDraw()
        
        // clear the screen
        glClear(GLuint(GL_COLOR_BUFFER_BIT))
        glClearColor(0, 0, 0, 1.0)
        
        // setup vertices
        var vertices:[GLfloat] = [
            -0.5, -0.5, -1.0,
            0.0, 0.5, -1.0,
            0.5, -0.5, -1.0
        ]
        
        // setup colors
        var colors:[GLfloat] = [
            0.0, 0.0, 1.0, 1.0,
            0.0, 1.0, 0.0, 1.0,
            1.0,0.0,0.0,1.0
        ]
        
        glEnableVertexAttribArray(GLuint(GLKVertexAttrib.Position.rawValue))
        glEnableVertexAttribArray(GLuint(GLKVertexAttrib.Color.rawValue))
        glVertexAttribPointer(GLuint(GLKVertexAttrib.Position.rawValue), 3, GLenum(GL_FLOAT), GLboolean(GL_FALSE), 0, vertices)
         glVertexAttribPointer(GLuint(GLKVertexAttrib.Color.rawValue), 4, GLenum(GL_FLOAT), GLboolean(GL_FALSE), 0, colors)
         glDrawArrays(GLuint(GL_TRIANGLES), 0, 3)
        
        
        glBindRenderbuffer(GLuint(GL_RENDERBUFFER), self.colorRenderbuffer)
        self.glContext.presentRenderbuffer(Int(GL_RENDERBUFFER))
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // set up context
        self.glContext = EAGLContext(API: EAGLRenderingAPI.OpenGLES2)
        EAGLContext.setCurrentContext(self.glContext)
        self.glLayer = CAEAGLLayer()
        self.glLayer.frame = self.glView.bounds
        self.glView.layer.addSublayer(self.glLayer)
        
        self.glLayer.drawableProperties = [kEAGLDrawablePropertyRetainedBacking: false,
            kEAGLDrawablePropertyColorFormat: kEAGLColorFormatRGBA8]
        
        self.effect=GLKBaseEffect()
        self.setUpBuffers()
        self.drawFrame()
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    override func viewDidDisappear(animated: Bool) {
        self.tearDownBuffers()
        super.viewDidDisappear(animated)
    
    }
    
}

ex6-1.swift

//
//  ViewController.swift
//  animation61
//
//  Created by Sunny Cheung on 16/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import QuartzCore

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView?
    

    override func viewDidLoad() {
        super.viewDidLoad()
        
        var path:UIBezierPath = UIBezierPath()
        path.moveToPoint(CGPointMake(175,100))
        path.addArcWithCenter(CGPointMake(150,100), radius: 25, startAngle: 0, endAngle: CGFloat(2*M_PI), clockwise: true)
        path.moveToPoint(CGPointMake(150,125))
        path.addLineToPoint(CGPointMake(150,175))
        path.addLineToPoint(CGPointMake(125,225))
        path.moveToPoint(CGPointMake(150,175))
        path.addLineToPoint(CGPointMake(175,225))
        path.moveToPoint(CGPointMake(100,150))
        path.addLineToPoint(CGPointMake(200, 150))
        
        var shapeLayer:CAShapeLayer = CAShapeLayer()
        shapeLayer.strokeColor = UIColor.redColor().CGColor
        shapeLayer.fillColor = UIColor.clearColor().CGColor
        shapeLayer.lineWidth = 5
        shapeLayer.lineJoin = kCALineJoinRound
        shapeLayer.lineCap = kCALineCapRound
        shapeLayer.path = path.CGPath
        
        self.containerView?.layer.addSublayer(shapeLayer)
        
        // Do any additional setup after loading the view, typically from a nib.
    }

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


}

ex6-10.swift

//
//  ScrollView.swift
//  animation610
//
//  Created by Sunny Cheung on 23/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import Foundation
import QuartzCore
import UIKit

class ScrollView : UIView {
    
    class override func layerClass() -> AnyClass {
        return CAScrollLayer.self
    }
    
    func setup() {
        // enable clipping
        self.layer.masksToBounds = true
        
        // attach pan gesture recongnizer
        var recognizer:UIPanGestureRecognizer?
        recognizer = UIPanGestureRecognizer(target: self, action: Selector("pan:"))
        
        self.addGestureRecognizer(recognizer!)
    }
    
    override init(frame:CGRect) {
        super.init(frame: frame)
        self.setup()
    }
    
    
    required init(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
    }
    
    override func awakeFromNib() {
        self.setup()
    }
    
    func pan(recognizer:UIPanGestureRecognizer) {
        
        var offset:CGPoint = self.bounds.origin
        offset.x -= recognizer.translationInView(self).x
        offset.y -= recognizer.translationInView(self).y
        
        (self.layer as CAScrollLayer).scrollToPoint(offset)
        recognizer.setTranslation(CGPointZero, inView: self)
    }
    
    
    
    
}

ex6-12

//
//  ViewController.swift
//  animation612
//
//  Created by Sunny Cheung on 23/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import QuartzCore
import Foundation

class ViewController: UIViewController {
    
    @IBOutlet var scrollView:UIScrollView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // add the tiled layer
        var tileLayer:CATiledLayer = CATiledLayer()
        tileLayer.frame = CGRectMake(0,0,2048,2048)
        tileLayer.delegate = self
        self.scrollView!.layer.addSublayer(tileLayer)
        
        // configure the scroll view
        self.scrollView!.contentSize = tileLayer.frame.size
        
        // draw layer
        tileLayer.setNeedsDisplay()
        
    }
    
    override func drawLayer(layer: CALayer!, inContext ctx: CGContext!) {
        
        
        // determine tile coordinate
        var bounds:CGRect = CGContextGetClipBoundingBox(ctx)
    
        var x:Int = Int(bounds.origin.x / (layer as CATiledLayer).tileSize.width)
        var y:Int = Int(bounds.origin.y / (layer as CATiledLayer).tileSize.height)
       
        //load tile image
        var imageName:NSString = NSString(format: "Snowman_%02i_%02i", x, y)
        var imagePath:NSString = NSBundle.mainBundle().pathForResource(imageName, ofType: "jpg")!
        
        var tileImage:UIImage = UIImage(contentsOfFile: imagePath)!
        
        //draw title
        UIGraphicsPushContext(ctx)
        tileImage.drawInRect(bounds)
        UIGraphicsPopContext()
        
    }

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

ex6-16.swift

//
//  ViewController.swift
//  animation616
//
//  Created by Sunny Cheung on 24/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import AVFoundation

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // get video URL
        var URL:NSURL! = NSBundle.mainBundle().URLForResource("Ship", withExtension: "mp4")
        
        // create player and player layer
        var player:AVPlayer = AVPlayer(URL: URL)
        var playerLayer:AVPlayerLayer = AVPlayerLayer(player: player)
        
        // set player layer frame and attach it to our view
        playerLayer.frame = self.containerView.bounds
        self.containerView.layer.addSublayer(playerLayer)
        
        // play the video
        player.play()
    }

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


}

ex6-17.swift

//
//  ViewController.swift
//  animation616
//
//  Created by Sunny Cheung on 24/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import AVFoundation

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // get video URL
        var URL:NSURL! = NSBundle.mainBundle().URLForResource("Ship", withExtension: "mp4")
        
        // create player and player layer
        var player:AVPlayer = AVPlayer(URL: URL)
        var playerLayer:AVPlayerLayer = AVPlayerLayer(player: player)
        
        // set player layer frame and attach it to our view
        playerLayer.frame = self.containerView.bounds
        self.containerView.layer.addSublayer(playerLayer)
        
        // transform layer
        var transform:CATransform3D = CATransform3DIdentity
        transform.m34 = -1.0/500.0
        transform = CATransform3DRotate(transform, CGFloat(M_PI_4), 1, 1, 0)
        playerLayer.transform = transform
        
        // add rounded corners and border
        playerLayer.masksToBounds = true
        playerLayer.cornerRadius = 20.0
        playerLayer.borderColor = UIColor.redColor().CGColor
        playerLayer.borderWidth = 5.0
        
        
        // play the video
        player.play()
    }

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


}

ex6-2.swift

//
//  ViewController.swift
//  animation62
//
//  Created by Sunny Cheung on 16/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet var labelView:UIView?

    override func viewDidLoad() {
        super.viewDidLoad()
    
        // Do any additional setup after loading the view, typically from a nib.
        
        // create a text layer
        var textLayer:CATextLayer = CATextLayer()
        textLayer.frame = self.labelView!.bounds
        self.labelView?.layer.addSublayer(textLayer)
        
        //set text attributes
        textLayer.foregroundColor = UIColor.blackColor().CGColor
        textLayer.alignmentMode = kCAAlignmentJustified
        textLayer.wrapped = true
        
        // choose a font
        var font:UIFont = UIFont.systemFontOfSize(15)
        
        // set layer font
        var fontName:CFString = CFStringCreateWithCString(nil, font.fontName, kCFStringEncodingASCII)
        var fontRef:CGFontRef = CGFontCreateWithFontName(fontName)
        textLayer.font = fontRef
        textLayer.fontSize = font.pointSize

        let text:NSString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus commodo tellus non leo laoreet convallis. Ut molestie elit vel diam luctus vestibulum. Mauris a condimentum libero. Donec pretium turpis sed porttitor tincidunt. Sed a aliquam neque. Phasellus fermentum auctor aliquam. Cras cursus tincidunt augue ac pharetra. Curabitur facilisis posuere nisl et ultricies. Praesent consequat libero nulla, eget gravida dui gravida non. Vivamus varius ornare auctor."
        
        textLayer.string = text
        
        
    }

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


}

ex6-3.swift

//
//  ViewController.swift
//  animation63
//
//  Created by Sunny Cheung on 16/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit
import QuartzCore
import CoreText


class ViewController: UIViewController {
    
    @IBOutlet var labelView:UIView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        var textLayer:CATextLayer = CATextLayer()
        textLayer.frame = self.labelView!.bounds
        textLayer.contentsScale = UIScreen.mainScreen().scale
        self.labelView?.layer.addSublayer(textLayer)
        
        // set Text attribute
        textLayer.alignmentMode = kCAAlignmentJustified
        textLayer.wrapped = true
        
        // choose font
        var font:UIFont  = UIFont.systemFontOfSize(15)
        
        // choose some text
        var text:NSString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus commodo tellus non leo laoreet convallis. Ut molestie elit vel diam luctus vestibulum. Mauris a condimentum libero. Donec pretium turpis sed porttitor tincidunt. Sed a aliquam neque. Phasellus fermentum auctor aliquam. Cras cursus tincidunt augue ac pharetra. Curabitur facilisis posuere nisl et ultricies. Praesent consequat libero nulla, eget gravida dui gravida non. Vivamus varius ornare auctor."
        
        // create attribute string
        var string:NSMutableAttributedString = NSMutableAttributedString(string: text)
        
        // convert UIFont to CTFont
        var fontName:CFString = CFStringCreateWithCString(nil, font.fontName, CFStringBuiltInEncodings.UTF8.toRaw())
        var fontSize:CGFloat = font.pointSize
        var fontRef = CTFontCreateWithName(fontName,fontSize,nil)
        
        // set text attribute
        var attribs:NSDictionary = [kCTForegroundColorAttributeName : UIColor.blackColor().CGColor,
            kCTFontAttributeName: fontRef]
        
        string.setAttributes(attribs,range: NSMakeRange(0, text.length))
        attribs = [ kCTForegroundColorAttributeName : UIColor.redColor().CGColor,
            kCTUnderlineStyleAttributeName:  NSInteger(CTUnderlineStyle.Single.toRaw()),  // CTUnderlineStyle.Single cannot conform as AnyObject, ok to convert to NSInteger?
            kCTFontAttributeName: fontRef ]
        CTUnderlineStyle.Single
        string.setAttributes(attribs,range: NSMakeRange(6, 5))
        textLayer.string = string
        
        
        
        
    }

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


}

ex6-4.swift

//
//  LayerLabel.swift
//  animation64
//
//  Created by Sunny Cheung on 21/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import Foundation
import UIKit
import QuartzCore

class LayerLabel : UILabel {
    
    required init(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
        self.setup()
    }
    
    override init(frame:CGRect) {
        super.init(frame:frame)
        self.setup()
    }

    override  func awakeFromNib() {
        super.awakeFromNib()
        self.setup()
    }
    override class func layerClass() -> AnyClass {
        return CATextLayer.self
    }
    
    func textLayer() -> CATextLayer {
        return self.layer as CATextLayer
    }
    
    func setup() {
        self.text = self.text
        self.textColor = self.textColor
        self.font = self.font
        self.textLayer().alignmentMode = kCAAlignmentJustified
        self.textLayer().wrapped = true
        self.layer.display()
    }
    
 
    func setText(text:NSString) {
        super.text = text
        self.textLayer().string = text
    }
    
    func setTextColor(textColor:UIColor) {
        super.textColor = textColor
       self.textLayer().foregroundColor = textColor.CGColor
    }
    
    func setFont(font:UIFont) {
        super.font = font
        var fontName:CFString = CFStringCreateWithCString(nil,font.fontName,CFStringBuiltInEncodings.UTF8.toRaw())
        var fontRef:CGFontRef = CGFontCreateWithFontName(fontName)
        self.textLayer().font = fontRef
        self.textLayer().fontSize = font.pointSize
    }
}

ex6-5.swift

//
//  ViewController.swift
//  animation65
//
//  Created by Sunny Cheung on 21/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView?

    func faceWithTransform(transform:CATransform3D) -> CALayer {
        
        var face = CALayer()
        face.frame = CGRectMake(-50,-50,100,100)
        
        var red:CGFloat = CGFloat(Double(rand()) / Double(Int32.max))
        var green:CGFloat = CGFloat(Double(rand()) / Double(Int32.max))
        var blue:CGFloat = CGFloat(Double(rand()) / Double(Int32.max))
      
        face.backgroundColor = UIColor(red: red, green: green, blue: blue, alpha: 1.0).CGColor
        face.transform = transform
        return face
        
    }
    
    func cubeWithTransform(transform:CATransform3D) -> CALayer {
        var cube = CATransformLayer()
        
        var ct:CATransform3D = CATransform3DMakeTranslation(0, 0, 50)
        cube.addSublayer(self.faceWithTransform(ct))
        
        ct = CATransform3DMakeTranslation(50, 0, 0)
        ct = CATransform3DRotate(ct, CGFloat(M_PI_2), 0, 1, 0)
        cube.addSublayer(self.faceWithTransform(ct))
        
        ct = CATransform3DMakeTranslation(0, -50, 0)
        ct = CATransform3DRotate(ct, CGFloat(M_PI_2), 1, 0, 0)
        cube.addSublayer(self.faceWithTransform(ct))
        
        ct = CATransform3DMakeTranslation(0, 50, 0)
        ct = CATransform3DRotate(ct, CGFloat(-M_PI_2), 1, 0, 0)
        cube.addSublayer(self.faceWithTransform(ct))
        
        ct = CATransform3DMakeTranslation(-50, 0, 0)
        ct = CATransform3DRotate(ct, CGFloat(-M_PI_2), 0, 1, 0)
        cube.addSublayer(self.faceWithTransform(ct))
        
        ct = CATransform3DMakeTranslation(0, 0, -50)
        ct = CATransform3DRotate(ct, CGFloat(M_PI), 0, 1, 0)
        cube.addSublayer(self.faceWithTransform(ct))
        
        var containerSize = self.containerView?.bounds.size
        cube.position = CGPointMake(containerSize!.width/2.0,containerSize!.height/2.0)
        
        cube.transform = transform
        return cube
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var pt:CATransform3D = CATransform3DIdentity;
        pt.m34 = -1.0/500.0
        self.containerView?.layer.sublayerTransform = pt
        
        
        var clt:CATransform3D = CATransform3DIdentity
        clt = CATransform3DTranslate(clt, -100, 0, 0)
        var cube1:CALayer = self.cubeWithTransform(clt)
        self.containerView!.layer.addSublayer(cube1)
        
       var c2t:CATransform3D = CATransform3DIdentity
        c2t = CATransform3DTranslate(c2t, 100, 0, 0)
        c2t = CATransform3DRotate(c2t, CGFloat(-M_PI_4), 1, 0, 0)
        c2t = CATransform3DRotate(c2t, CGFloat(-M_PI_4), 0, 1, 0)
        var cube2:CALayer = self.cubeWithTransform(c2t)
        self.containerView!.layer.addSublayer(cube2)
    }

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


}

ex6-6.swift

//
//  ViewController.swift
//  animation66
//
//  Created by Sunny Cheung on 22/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        var gradientLayer:CAGradientLayer=CAGradientLayer()
        gradientLayer.frame = self.containerView!.bounds
        self.containerView?.layer.addSublayer(gradientLayer)
    
        gradientLayer.colors = [UIColor.redColor().CGColor as AnyObject, UIColor.blueColor().CGColor as AnyObject]
        gradientLayer.startPoint = CGPointMake(0,0)
        gradientLayer.endPoint = CGPointMake(1,1)
        
    }

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


}

ex6-7.swift

//
//  ViewController.swift
//  animation67
//
//  Created by Sunny Cheung on 22/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    @IBOutlet var containerView:UIView?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var gradientLayer:CAGradientLayer = CAGradientLayer()
        
        gradientLayer.frame = self.containerView!.bounds
        self.containerView?.layer.addSublayer(gradientLayer)
        
        gradientLayer.colors = [ UIColor.redColor().CGColor as AnyObject,
                                UIColor.yellowColor().CGColor as AnyObject,
                                UIColor.greenColor().CGColor as AnyObject]
        
        gradientLayer.locations=[0.0,0.25,0.5]
        gradientLayer.startPoint = CGPointMake(0,0)
        gradientLayer.endPoint = CGPointMake(1,1)
        
        
    }

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


}

ex6-8.swift

//
//  ViewController.swift
//  animation68
//
//  Created by Sunny Cheung on 22/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet var containerView:UIView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var replicator:CAReplicatorLayer = CAReplicatorLayer()
        replicator.frame = self.containerView!.bounds
        self.containerView?.layer.addSublayer(replicator)
        
        replicator.instanceCount = 10
        
        var transform:CATransform3D = CATransform3DIdentity
        transform = CATransform3DTranslate(transform, 0, 200, 0)
        transform = CATransform3DRotate(transform, CGFloat(Float(M_PI)/5.0), 0, 0, 1)
        transform = CATransform3DTranslate(transform, 0, -200, 0)
        replicator.instanceTransform = transform
        
        replicator.instanceBlueOffset = -0.1
        replicator.instanceGreenOffset = -0.1
        
        var layer:CALayer = CALayer()
        
        layer.frame = CGRectMake(100, 100, 100, 100)
        layer.backgroundColor = UIColor.whiteColor().CGColor
        replicator.addSublayer(layer)
        
    }

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


}

ex6-9.swift

//
//  ReflectionView.swift
//  animation69
//
//  Created by Sunny Cheung on 22/10/14.
//  Copyright (c) 2014 khl. All rights reserved.
//

import Foundation
import QuartzCore
import UIKit

class ReflectionView : UIView {
    
    class override func layerClass() -> AnyClass {
        return CAReplicatorLayer.self
    }
    
    func setup() {
        var layer:CAReplicatorLayer = self.layer as CAReplicatorLayer
        layer.instanceCount = 2
        
        var transform:CATransform3D = CATransform3DIdentity
        var verticalOffset:CGFloat = self.bounds.size.height+2
        transform = CATransform3DTranslate(transform, 0, verticalOffset, 0)
        transform = CATransform3DScale(transform, 1, -1, 0)
        layer.instanceTransform = transform
        
        layer.instanceAlphaOffset = -0.6
       // layer.backgroundColor = UIColor.grayColor().CGColor
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.setup()
    }

    required init(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
        self.setup()
        
    }
    
    override func awakeFromNib() {
        self.setup()
    }
}