iOS核心动画高级技巧之图层变换和专用图层(二)

 1 blueView = UIView()
 2 blueView.frame = CGRectMake(50, 100, 100, 100)
 3 blueView.backgroundColor = UIColor.blueColor()
 4 self.view.addSubview(blueView)
 5 
 6 yellowView = UIView()
 7 yellowView.frame = CGRectMake(50 + 200 / 1.414, 100, 100, 100)//注意yellowView的水平位置,和blueView作对比
 8 yellowView.backgroundColor = UIColor.yellowColor()
 9 self.view.addSubview(yellowView)
10 
11 blueView.transform = CGAffineTransformIdentity  //初始化transform
12 blueView.transform = CGAffineTransformMakeScale(0.5, 0.5 )  //缩小0.5倍
13 blueView.transform = CGAffineTransformRotate(blueView.transform, CGFloat(M_PI_4))   //旋转pi/4
14 blueView.transform = CGAffineTransformTranslate(blueView.transform, 400, 0) //平移400

1 blueLayer.transform = CATransform3DIdentity  //初始化transform
2 blueLayer.transform = CATransform3DMakeScale(0.5, 0.5, 0)  //缩小0.5倍
3 blueLayer.transform = CATransform3DRotate(blueLayer.transform,CGFloat( M_PI_4 ), 0.0,  1.0, 0) //旋转pi/4
4 blueLayer.transform = CATransform3DTranslate(blueLayer.transform,400, 0, 0)     //平移400

1 var transform = CATransform3DIdentity //初始化transform
2 transform.m34 = -1 / 500.0 //设置m34的值
3 // transform = CATransform3DScale( transform, 0.5, 0.5, 0) //缩小0.5倍,这里不能用
4 transform = CATransform3DRotate(transform,CGFloat( M_PI_4 ), 0.0,  1.0, 0) //旋转pi/4
5 transform = CATransform3DTranslate(transform,400, 0, 0)     //平移400
6 blueLayer.transform = transform

DEMO1:
 1 let shapePath = UIBezierPath()
 2 shapePath.moveToPoint(CGPointMake(175, 100))
 3 shapePath.addArcWithCenter(CGPointMake(150, 100), radius: 25, startAngle: 0, endAngle:CGFloat( 2 * M_PI ), clockwise: true)
 4 shapePath.moveToPoint(CGPointMake(150, 125))
 5 shapePath.addLineToPoint(CGPointMake(150, 175))
 6 shapePath.addLineToPoint(CGPointMake(125, 225))
 7 shapePath.moveToPoint(CGPointMake(150, 175))
 8 shapePath.addLineToPoint(CGPointMake(175, 225))
 9 shapePath.moveToPoint(CGPointMake(100, 150))
10 shapePath.addLineToPoint(CGPointMake(200, 150))
11 
12 let shapeLayer = CAShapeLayer()
13 shapeLayer.strokeColor = UIColor.redColor().CGColor
14 shapeLayer.fillColor = UIColor.clearColor().CGColor
15 shapeLayer.lineWidth = 5
16 shapeLayer.lineJoin = kCALineJoinRound
17 shapeLayer.lineCap = kCALineCapRound
18 shapeLayer.path = shapePath.CGPath
19 self.view.layer.addSublayer(shapeLayer)

DEMO2:
1 var rect = CGRectMake(50, 50, 100, 100);
2 var radii = CGSizeMake(20, 20);
3 var corners = UIRectCorner.TopRight | UIRectCorner.BottomRight | UIRectCorner.BottomLeft
4 var shapePath = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: radii) 

 1 var textLayer = CATextLayer()
 2 textLayer.frame = CGRectMake(100, 100, 200, 300)
 3 self.view.layer.addSublayer(textLayer)
 4 
 5 //设置它的属性
 6 textLayer.foregroundColor = UIColor.redColor().CGColor
 7 textLayer.alignmentMode = kCAAlignmentJustified
 8 textLayer.wrapped = true
 9 
10 //它的font是CGFont类型,需要大小字体分开设置
11 var font = UIFont.systemFontOfSize(24)
12 textLayer.font = CGFontCreateWithFontName(font.fontName)
13 textLayer.fontSize = font.pointSize
14 
15 var textStr = "hello kitty hi nohhhh no wo  shi lllll aaaaawo  jiojhello kitty hi nohhhh no wo  shi lllll aaaaawo  jioj"
16 textLayer.string = textStr
17 
18 //它contentScale默认是1,为了让它以retina的质量来显示,设置为2
19 textLayer.contentsScale = UIScreen.mainScreen().scale

1 gradientLayer = CAGradientLayer()
2 gradientLayer.frame = CGRectMake(50, 50, 300, 300)
3 gradientLayer.backgroundColor = UIColor.grayColor().CGColor
4 self.view.layer.addSublayer(gradientLayer)
5 
6 gradientLayer.colors = [UIColor.redColor().CGColor,UIColor.blueColor().CGColor, UIColor.greenColor().CGColor]
7 gradientLayer.startPoint = CGPointMake(0, 0)
8 gradientLayer.endPoint = CGPointMake(1, 1)

 1 repeatLayer = CAReplicatorLayer()
 2 repeatLayer.frame = CGRectMake(50, 50, 300, 300)
 3 repeatLayer.backgroundColor = UIColor.grayColor().CGColor
 4 self.view.layer.addSublayer(repeatLayer)
 5 
 6 var transform = CATransform3DIdentity
 7 transform = CATransform3DTranslate(transform, 0, 100, 0);
 8 transform = CATransform3DRotate(transform, CGFloat( M_PI / 5.0 ), 0, 0, 1);
 9 transform = CATransform3DTranslate(transform, 0, -100, 0);
10 repeatLayer.instanceTransform = transform;
11 
12 repeatLayer.instanceCount = 10
13 
14 repeatLayer.instanceBlueOffset = -0.1
15 repeatLayer.instanceRedOffset = -0.1
16 
17 var layer  = CALayer()
18 layer.frame = CGRect(x: 125, y: 125, width: 50, height: 50)
19 layer.backgroundColor = UIColor.whiteColor().CGColor
20 repeatLayer.addSublayer(layer) 

1 NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: NSSelectorFromString("setPosition"), userInfo: nil, repeats: false)
2 
3 func setPosition () {
4     self.scrollLayer.scrollToPoint(CGPointMake(0, 100))
5 }

 1 emitterLayer = CAEmitterLayer()
 2 emitterLayer.frame = CGRectMake(100 , 100, 200, 200)
 3 emitterLayer.backgroundColor = UIColor.grayColor().CGColor
 4 self.view.layer.addSublayer(emitterLayer)
 5 
 6 emitterLayer.renderMode = kCAEmitterLayerAdditive
 7 emitterLayer.emitterPosition = CGPointMake(emitterLayer.frame.size.width / 2, emitterLayer.frame.size.height / 2)
 8 
 9 var cell = CAEmitterCell()
10 cell.contents = UIImage(named: "lizi.png")?.CGImage
11 cell.birthRate = 10 //粒子出现的速率
12 cell.lifetime = 4.0 //声明周期,秒
13 cell.emissionRange = 2 //发射的方向
14 
15 cell.color = UIColor(red: 1, green: 1, blue: 0.5, alpha: 1).CGColor //粒子的颜色
16 cell.alphaSpeed = -0.4 //透明度改变速率
17 cell.velocity = 50//粒子运动速度
18 cell.velocityRange = 100//粒子速度范围,约束速度
19 
20 emitterLayer.emitterCells = [cell]

 1 var urlStr = NSBundle.mainBundle().pathForResource("1.mp4", ofType: nil)
 2 var url = NSURL(fileURLWithPath: urlStr!)
 3 var player = AVPlayer(URL: url)
 4 
 5 var playLayer = AVPlayerLayer(player: player)
 6 playLayer.frame = CGRectMake(0, 0,400, 300)
 7 playLayer.backgroundColor = UIColor.grayColor().CGColor
 8 self.view.layer.addSublayer(playLayer)
 9 
10 player.play()