I want to create an atomic motion animation in iOS, but there are some trouble could not solve.
here is my animation result
CAKeyframeAnimation position animation along bezierPath does not match the CABasicAnimation strokeEnd animation(particles animation does not match their wake animation).
2.The wake animation loop is incoherent, CABasicAnimation seems can't represent the Curving segment that strokeStart is positive and strokeEnd is negative.
my code:
let atom = CAShapeLayer()
var rect = CGRect(x: 0,y: 0,width: 5,height: 5)
var path = UIBezierPath(roundedRect: rect,cornerRadius: 5.0)
atom.path = path.CGPath;
atom.strokeColor = UIColor.greenColor().CGColor
atom.bounds = rect;
rect = CGRect(x: 0,y: 0,width: 300,height: 50);
path = UIBezierPath(ovalInRect:rect);
let orbit = CAShapeLayer()
orbit.path = path.CGPath;
orbit.strokeColor = UIColor.whiteColor().CGColor
orbit.lineWidth = 1;
orbit.fillColor = UIColor.clearColor().CGColor
orbit.bounds = CGPathGetPathBoundingBox(path.CGPath);
orbit.position = CGPoint(x:150,y:25)
rect = CGRect(x: 0,y: 0,width: 300,height: 50);
path = UIBezierPath(ovalInRect:rect);
let keyani = CAKeyframeAnimation(keyPath: "position");
keyani.path = path.CGPath
keyani.duration = 3.0;
keyani.repeatCount = HUGE;
keyani.additive = true
keyani.calculationMode = kCAAnimationPaced
keyani.rotationMode = kCAAnimationRotateAuto
keyani.timingFunction = CAMediaTimingFunction(name:kCAMediaTimingFunctionLinear);
atom.addAnimation(keyani, forKey: "")
let orbitAni = CABasicAnimation(keyPath: "strokeStart")
orbitAni.byValue = 1.0
orbitAni.cumulative = true
let orbitAni1 = CABasicAnimation(keyPath: "strokeEnd")
orbitAni1.fromValue = 0.0
orbitAni1.toValue = 1.0
let animationGroup = CAAnimationGroup()
animationGroup.animations = [orbitAni,orbitAni1]
animationGroup.duration = 3.0
animationGroup.repeatCount = HUGE
orbit.strokeStart = -0.2
orbit.addAnimation(animationGroup, forKey: "");
orbit.shadowRadius = 5.0;
orbit.shadowColor = UIColor.greenColor().CGColor
orbit.shadowOpacity = 0.5
orbit.shadowOffset = CGSizeZero
var trans = CGAffineTransformIdentity
trans = CGAffineTransformRotate(trans, CGFloat(M_PI_4))
repeator.instanceTransform = CATransform3DMakeAffineTransform (trans)
repeator.instanceCount = 4;
repeator.instanceDelay = 0;
repeator.addSublayer(orbit)
repeator.addSublayer(atom)
repeator.bounds = CGRect(x: 0,y: 0,width: 300,height: 50)
repeator.position = CGPoint(x:200,y:200)
repeator.anchorPoint = CGPoint(x:0.5,y:0.5)
repeator.instanceAlphaOffset = 1.0
Related
I have a circle that is animating itself. It is given a number between 0.01 and 1.0 and it animates after that in a circle.
I have a label in the middle of it called progressLabel. I would like the label to count along as the circle animates. So if the value is at 0.12, the label should display 12%.
Here is the code for my circle animating:
func animateView(toValue: Double, strokeColor: UIColor) {
let screenWidth = self.view.frame.size.width
let screenHeight = self.view.frame.size.height
let circle = UIView(frame: CGRectMake((screenWidth / 2) - (150 / 2), (screenHeight / 2) - (150 / 2), 150, 150)) // viewProgress is a UIView
circle.backgroundColor = UIColor.clearColor()
view.addSubview(circle)
var progressCircle = CAShapeLayer()
var backgroundCircle = CAShapeLayer()
progressCircle.frame = view.bounds
backgroundCircle.frame = view.bounds
let lineWidth:CGFloat = 20
let rectFofOval = CGRectMake(lineWidth / 2, lineWidth / 2, circle.bounds.width - lineWidth, circle.bounds.height - lineWidth)
let circlePath = UIBezierPath(ovalInRect: rectFofOval)
progressCircle = CAShapeLayer ()
progressCircle.path = circlePath.CGPath
progressCircle.strokeColor = UIColor.whiteColor().CGColor
progressCircle.fillColor = UIColor.clearColor().CGColor
progressCircle.lineWidth = 20.0
progressCircle.frame = view.bounds
progressCircle.lineCap = "round"
backgroundCircle = CAShapeLayer ()
backgroundCircle.path = circlePath.CGPath
backgroundCircle.strokeColor = strokeColor.CGColor
backgroundCircle.fillColor = UIColor.clearColor().CGColor
backgroundCircle.lineWidth = 20.0
backgroundCircle.frame = view.bounds
backgroundCircle.lineCap = "round"
circle.layer.addSublayer(backgroundCircle)
circle.layer.addSublayer(progressCircle)
circle.transform = CGAffineTransformRotate(circle.transform, CGFloat(-M_PI_2))
let animation = CABasicAnimation(keyPath: "strokeEnd")
animation.fromValue = 0
animation.toValue = toValue
animation.duration = 1
animation.fillMode = kCAFillModeForwards
animation.removedOnCompletion = false
animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
progressCircle.addAnimation(animation, forKey: nil)
}
I have tried this but the label just keeps displaying 0.0%..
var current: Double = 0.0
let i = current * 100
let max = 0.1 * 100
if i < max {
self.progressLabel.text = "\(current)%"
current += 0.01 * 100
}
You should check the values of the presentation layer to get the current value of the animated property.
func printValue() {
let currentLayer = progressCircle.presentation()
current = currentLayer?.value(forKeyPath: "strokeEnd") as? Float;
print("current \(current)")
let i = current! * 100
let max:Float = 100
if i < max {
self.progressLabel.text = "\(current! * 100)%"
}
}
Call the method printValue from where ever you want to display the current value
I want a layer to behave like this:
Instead, it behaves like this:
The card flip animation is created by two CABasicAnimations applied in a CAAnimationGroup. The incorrect spin effect happens because the implicit animation from the CALayer property change runs first and then my animation specified in the CABasicAnimation runs. How can I stop the implicit animation from running so that only my specified animation runs?
Here's the relevant code:
class ViewController: UIViewController {
var simpleLayer = CALayer()
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap))
self.view.addGestureRecognizer(tap)
simpleLayer.frame = CGRect(origin: CGPoint(x: view.bounds.width / 2 - 50, y: view.bounds.height / 2 - 50), size: CGSize(width: 100, height: 100))
simpleLayer.backgroundColor = UIColor.blackColor().CGColor
view.layer.addSublayer(simpleLayer)
}
func handleTap() {
let xRotation = CABasicAnimation(keyPath: "transform.rotation.x")
xRotation.toValue = 0
xRotation.byValue = M_PI
let yRotation = CABasicAnimation(keyPath: "transform.rotation.y")
yRotation.toValue = 0
yRotation.byValue = M_PI
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.y")
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.x")
let group = CAAnimationGroup()
group.animations = [xRotation, yRotation]
group.duration = 0.6
group.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
simpleLayer.addAnimation(group, forKey: nil)
}
}
#LucasTizma had the correct answer.
Surround your animation with CATransaction.begin(); CATransaction.setDisableActions(true) and CATransaction.commit(). This will disable the implicit animation and make the CAAnimationGroup animate correctly.
Here's the final result:
This is the important snippet of code in Swift 3:
CATransaction.begin()
CATransaction.setDisableActions(true)
let xRotation = CABasicAnimation(keyPath: "transform.rotation.x")
xRotation.toValue = 0
xRotation.byValue = M_PI
let yRotation = CABasicAnimation(keyPath: "transform.rotation.y")
yRotation.toValue = 0
yRotation.byValue = M_PI
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.x")
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.y")
let group = CAAnimationGroup()
group.animations = [xRotation, yRotation]
simpleLayer.add(group, forKey: nil)
CATransaction.commit()
And this is the full code for the depicted animation with an iOS app:
class ViewController: UIViewController {
var simpleLayer = CALayer()
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap))
self.view.addGestureRecognizer(tap)
let ratio: CGFloat = 1 / 5
let viewWidth = view.bounds.width
let viewHeight = view.bounds.height
let layerWidth = viewWidth * ratio
let layerHeight = viewHeight * ratio
let rect = CGRect(origin: CGPoint(x: viewWidth / 2 - layerWidth / 2,
y: viewHeight / 2 - layerHeight / 2),
size: CGSize(width: layerWidth, height: layerHeight))
let topRightPoint = CGPoint(x: rect.width, y: 0)
let bottomRightPoint = CGPoint(x: rect.width, y: rect.height)
let topLeftPoint = CGPoint(x: 0, y: 0)
let linePath = UIBezierPath()
linePath.move(to: topLeftPoint)
linePath.addLine(to: topRightPoint)
linePath.addLine(to: bottomRightPoint)
linePath.addLine(to: topLeftPoint)
let maskLayer = CAShapeLayer()
maskLayer.path = linePath.cgPath
simpleLayer.frame = rect
simpleLayer.backgroundColor = UIColor.black.cgColor
simpleLayer.mask = maskLayer
// Smooth antialiasing
// * Convert the layer to a simple bitmap that's stored in memory
// * Saves CPU cycles during complex animations
// * Rasterization is set to happen during the animation and is disabled afterwards
simpleLayer.rasterizationScale = UIScreen.main.scale
view.layer.addSublayer(simpleLayer)
}
func handleTap() {
CATransaction.begin()
CATransaction.setDisableActions(true)
CATransaction.setCompletionBlock({
self.simpleLayer.shouldRasterize = false
})
simpleLayer.shouldRasterize = true
let xRotation = CABasicAnimation(keyPath: "transform.rotation.x")
xRotation.toValue = 0
xRotation.byValue = M_PI
let yRotation = CABasicAnimation(keyPath: "transform.rotation.y")
yRotation.toValue = 0
yRotation.byValue = M_PI
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.x")
simpleLayer.setValue(M_PI, forKeyPath: "transform.rotation.y")
let group = CAAnimationGroup()
group.animations = [xRotation, yRotation]
group.duration = 1.2
group.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
simpleLayer.add(group, forKey: nil)
CATransaction.commit()
}
}
You are creating 2 separate animations and applying them in an animation group. When you do that they are applied as 2 discrete steps.
It looks like that's not what you want. If not, then don't create 2 separate animations, one on transform.rotation.x and the other on transform.rotation.y. Instead, concatenate both changes onto a transformation matrix and apply the changed transformation matrix as a single animation.
I am trying to animate a gradient layer continuously. Please see the below gif?
I am using CAGradientLayer, but it only animates on color at a time.
var gradient: CAGradientLayer!
self.gradient = CAGradientLayer()
self.gradient.frame = CGRect(x: 0, y: 0, width:view.layer.frame.size.width, height: 50)
self.gradient.colors = [UIColor.redColor().CGColor, UIColor.redColor().CGColor]
self.view.layer.addSublayer(self.gradient)
self.animateLayer()
func animateLayer () {
let fromColors: NSArray = self.gradient.colors!
let toColors: NSArray = [UIColor.blueColor().CGColor, UIColor.blueColor().CGColor]
self.gradient.colors = toColors as [AnyObject]
let animation : CABasicAnimation = CABasicAnimation(keyPath: "colors")
animation.fromValue = fromColors
animation.toValue = toColors
animation.duration = 3.00
animation.removedOnCompletion = true
animation.fillMode = kCAFillModeForwards
animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
animation.delegate = self
self.gradient?.addAnimation(animation, forKey:"animateGradient")
}
I want to have an animation for my circular progressView with the code below. I want the animation start the progress from 0 to the value I want.
But I can never get the animation work.
func Popular(){
let circle = Pop;//Pop is a UIView
circle.bounds = CGRect(x: 0,y: 0, width: 100, height: 100);
circle.frame = CGRectMake(0,0, 100, 100);
circle.layoutIfNeeded()
var progressCircle = CAShapeLayer();
let centerPoint = CGPoint (x: circle.bounds.width / 2, y: circle.bounds.width / 2);
let circleRadius : CGFloat = circle.bounds.width / 2 * 0.83;
let circlePath = UIBezierPath(arcCenter: centerPoint, radius: circleRadius, startAngle: CGFloat(-0.5 * M_PI), endAngle: CGFloat(1.5 * M_PI), clockwise: true );
progressCircle = CAShapeLayer ();
progressCircle.path = circlePath.CGPath;
progressCircle.strokeColor = UIColor.greenColor().CGColor;
progressCircle.fillColor = UIColor.clearColor().CGColor;
UIView.animateWithDuration(3.0,
delay: 1.0,
options: [],
animations: {
progressCircle.lineWidth = 5.0;
progressCircle.strokeStart = 0;
progressCircle.strokeEnd = 0.20;
circle.layer.addSublayer(progressCircle);
circle
progressCircle.strokeEnd = 0.2;
},
completion: { finished in
print("Picutre done")
})
}
Use CABasicAnimation
let circle = Pop
var progressCircle = CAShapeLayer()
let circlePath = UIBezierPath(ovalInRect: circle.bounds)
progressCircle = CAShapeLayer ()
progressCircle.path = circlePath.CGPath
progressCircle.strokeColor = UIColor.greenColor().CGColor
progressCircle.fillColor = UIColor.clearColor().CGColor
progressCircle.lineWidth = 5.0
circle.layer.addSublayer(progressCircle)
let animation = CABasicAnimation(keyPath: "strokeEnd")
animation.fromValue = 0
animation.toValue = 0.2
animation.duration = 3
animation.fillMode = kCAFillModeForwards
animation.removedOnCompletion = false
progressCircle.addAnimation(animation, forKey: "ani")
Two things -
First - Do not re-initialize progressCircle. You are calling progressCircle = CAShapeLayer (); twice. This is not bug here though.
Second - Add your sublayer before you start animating it. Move circle.layer.addSublayer(progressCircle); outside the animation block.
On the following image, the blue circle is only for debug purpose. My goal is that every layer behind the blue circle should be transparent.I only want to keep visible what's outside the blue circle.
Here is the code written in swift :
let croissantView = UIView(frame: CGRectMake(100, 100, 100, 100))
croissantView.backgroundColor = UIColor.clearColor()
self.view.addSubview(croissantView)
let radius = 50 as CGFloat
let width = 50 as CGFloat
let origin = CGPointMake(0, 100)
let end = CGPointMake(100,100)
let highAmplitude = CGPointMake(50,180)
let lowAmplitude = CGPointMake(50,150)
let quad = UIBezierPath()
quad.moveToPoint(origin)
quad.addQuadCurveToPoint(end, controlPoint: highAmplitude)
quad.closePath()
let quad2 = UIBezierPath()
quad2.moveToPoint(origin)
quad2.addQuadCurveToPoint(end, controlPoint: lowAmplitude)
quad2.closePath()
let layer = CAShapeLayer()
layer.path = quad.CGPath
layer.strokeColor = UIColor.greenColor().CGColor
layer.fillColor = UIColor.blackColor().CGColor
croissantView.layer.addSublayer(layer)
let anim = CABasicAnimation(keyPath: "path")
anim.duration = 3
anim.repeatCount = 20
anim.fromValue = quad.CGPath
anim.toValue = quad2.CGPath
anim.autoreverses = true
layer.addAnimation(anim, forKey: "animQuad")
let animRotate = CABasicAnimation(keyPath: "transform.rotation")
animRotate.duration = 5
animRotate.repeatCount = 20
animRotate.fromValue = 0
animRotate.toValue = 360 * CGFloat(M_PI) / 180
croissantView.layer.addAnimation(animRotate, forKey: "animRotate")
let circle = UIBezierPath(arcCenter: croissantView.center, radius: 75, startAngle: 0, endAngle: 360 * CGFloat(M_PI) / 180, clockwise: true);
let circleLayer = CAShapeLayer()
circleLayer.path = circle.CGPath
circleLayer.fillColor = UIColor.blueColor().CGColor
circleLayer.opacity = 0.6
self.view.layer.addSublayer(circleLayer)
Thoughts
Substract from Layer, don't know if feasible
Blend, don't know how to do it with CALayer
Thanks !! :)
There are three things I would suggest.
Change your croissant view to a layer (not sure this was necessary, but this is what I did)
Create a CGPath for your circle shape that can have its mask inverted. You do this by wrapping an outer rect around your circle so that the path looks like this:
Set your fill rule on your circle shape layer to even-odd:
circleLayer.fillRule = kCAFillRuleEvenOdd
This is what it looks like:
I adapted your code to attempt it and this is what I came up with. Your mileage may vary:
func applyMask() {
let mainLayer = CALayer()
mainLayer.bounds = CGRect(x: 0.0, y: 0.0, width: 100.0, height: 100.0)
mainLayer.position = CGPoint(x: 200.0, y: 200.0)
// Set the color for debugging
mainLayer.backgroundColor = UIColor.orangeColor().CGColor
self.view.layer.addSublayer(mainLayer)
let radius = 50 as CGFloat
let width = 50 as CGFloat
let origin = CGPointMake(0, 100)
let end = CGPointMake(100,100)
let highAmplitude = CGPointMake(50,180)
let lowAmplitude = CGPointMake(50,150)
let quad = UIBezierPath()
quad.moveToPoint(origin)
quad.addQuadCurveToPoint(end, controlPoint: highAmplitude)
quad.closePath()
let quad2 = UIBezierPath()
quad2.moveToPoint(origin)
quad2.addQuadCurveToPoint(end, controlPoint: lowAmplitude)
quad2.closePath()
let layer = CAShapeLayer()
layer.path = quad.CGPath
layer.strokeColor = UIColor.greenColor().CGColor
layer.fillColor = UIColor.blackColor().CGColor
mainLayer.addSublayer(layer)
let anim = CABasicAnimation(keyPath: "path")
anim.duration = 3
anim.repeatCount = 20
anim.fromValue = quad.CGPath
anim.toValue = quad2.CGPath
anim.autoreverses = true
layer.addAnimation(anim, forKey: "animQuad")
let animRotate = CABasicAnimation(keyPath: "transform.rotation")
animRotate.duration = 5
animRotate.repeatCount = 20
animRotate.fromValue = 0
animRotate.toValue = 360 * CGFloat(M_PI) / 180
mainLayer.addAnimation(animRotate, forKey: "animRotate")
// Build a Circle CGPath
var circlePath = CGPathCreateMutable()
CGPathAddEllipseInRect(circlePath, nil, CGRectInset(mainLayer.bounds, -20.0, -20.0))
// Invert the mask by adding a bounding rectangle
CGPathAddRect(circlePath, nil, CGRectInset(mainLayer.bounds, -100.0, -100.0))
CGPathCloseSubpath(circlePath)
let circleLayer = CAShapeLayer()
circleLayer.fillColor = UIColor.blueColor().CGColor
circleLayer.opacity = 0.6
// Use the even odd fill rule so that our path gets inverted
circleLayer.fillRule = kCAFillRuleEvenOdd
circleLayer.path = circlePath
mainLayer.mask = circleLayer
mainLayer.addSublayer(layer)
}
Here's the project where I tried it out: https://github.com/perlmunger/SwiftVertedMask
Hope that helps.