I have a circle in my view, With a little oval that can be moved around that big circle, the idea of moving the little oval is to change the time on the clock. I am trying to move the oval but only by following the path so it won't get out of the circle. As if it was a rail road and the train only follows the rail roads but at the time follows the finger position.
Here I attach the image Image
I tried creating an animation, and maybe use that animation to then follow the finger. I don't really know how to do this. Any help please?
Here is my code for the animation (that don't work):
let customPath = UIBezierPath()
customPath.move(to: CGPoint.init(x: 160, y: 165))
customPath.addLine(to: CGPoint.init(x: 260, y: 245))
customPath.addLine(to: CGPoint.init(x: 165, y: 365))
customPath.addLine(to: CGPoint.init(x: 60, y: 260))
let movingImage = UIImage(named: "MoveOval")
let movingLayer = CALayer()
movingLayer.anchorPoint = CGPoint.zero
movingLayer.contents = moveOval
movingLayer.frame = CGRect.init(x: 0.0, y: 0.0, width: (movingImage?.size.width)!, height: (movingImage?.size.height)!)
self.view.layer.addSublayer(movingLayer)
let pathAnimation = CAKeyframeAnimation(keyPath: "anim")
pathAnimation.duration = 4.0
pathAnimation.path = customPath.cgPath
pathAnimation.calculationMode = kCAAnimationLinear
movingLayer.add(pathAnimation, forKey: "anim")
Related
Could you please advice why CATransform3DRotate doesnt work for layer in my case, its blue layer on the image.
I have custom view, where I draw nature view, I want to animate changing the moon phase that will be done inside the white circle layer as its mask. I suppose that it is good idea to apply here 3DRotation, but for some reason it doesn't work even without animation, could be please advice what I am doing wrong?
func drawMoonPhase(inRect rect:CGRect, inContext context: CGContext) {
let moonShape = UIBezierPath(ovalIn: rect)
moonShape.lineWidth = 4.0
UIColor.white.setStroke()
moonShape.stroke()
moonShape.close()
let moonLayer = CAShapeLayer()
moonLayer.path = moonShape.cgPath
moonLayer.opacity = 0
self.layer.addSublayer(moonLayer)
let circlePath = UIBezierPath(ovalIn: rect)
UIColor.blue.setFill()
circlePath.fill()
circlePath.close()
let circleShape = CAShapeLayer()
circleShape.path = circlePath.cgPath
circleShape.opacity = 0
var transform = CATransform3DIdentity
transform.m34 = -1 / 500.0
transform = CATransform3DRotate(transform, (CGFloat(Double.pi * 0.3)), 0, 1, 0)
circleShape.transform = transform
moonLayer.mask = circleShape
}
Thanks in advance
EDIT:
Maybe I want clear , the effect i want is the below:
The transform occurs around the layer's anchor point that by default is in the center. Therefore what it is happening there is that the shape rotates around itself causing no visible result. :)
what you should do in this layout of layer is to use cos and sin math functions in order to determine the x and y position of your moon.
Let me know if you need more insights I will be happy to help.
also, please note that you don't need 2 shapeLayers in order to have the blue moon with the white stroke. CAShapeLayer has properties for both fill and stroke so you can simplify your code.
Based on the new info here is my new answer:
I was not able to get a nice effect by using the transform, so I decided to write the mask manually. this is the result:
/**
Draw a mask based on the moon phase progress.
- parameter rect: The rect where the mon will be drawn
- parameter progress: The progress of the moon phase. This value must be between 0 and 1
*/
func moonMask(in rect: CGRect, forProgress progress: CGFloat)->CALayer {
let path = CGMutablePath()
let center = CGPoint(x: rect.midX, y: rect.midY)
path.move(to: CGPoint(x: rect.midX, y: 0))
let relativeProgress = (max(min(progress, 1), 0) - 0.5) * 2
let radius = rect.width/2
let tgX = rect.midX+(relativeProgress * (radius*4/3))
path.addCurve(to: CGPoint(x: rect.midX, y: rect.maxY), control1: CGPoint(x: tgX, y: 0), control2: CGPoint(x: tgX, y: rect.maxY))
path.addArc(center: center, radius: rect.width/2, startAngle: .pi/2, endAngle: .pi*3/2, clockwise: false)
//path.closeSubpath()
let mask = CAShapeLayer()
mask.path = path
mask.fillColor = UIColor.black.cgColor
return mask
}
The function above draws a shapelier that can be used as mask for your moonLayer. This layer will be drawnin relation to a progress parameter that you will pass in the function where 1 is full moon and 0 is new moon.
You can put everything together to have the desired effect, and you can extract the path creation code to make a nice animation if you want.
This should answer your question I hope.
To quick test I wrote this playground:
import UIKit
let rect = CGRect(origin: .zero, size: CGSize(width: 200, height: 200))
let view = UIView(frame: rect)
view.backgroundColor = .black
let layer = view.layer
/**
Draw a mask based on the moon phase progress.
- parameter rect: The rect where the mon will be drawn
- parameter progress: The progress of the moon phase. This value must be between 0 and 1
*/
func moonMask(in rect: CGRect, forProgress progress: CGFloat)->CALayer {
let path = CGMutablePath()
let center = CGPoint(x: rect.midX, y: rect.midY)
path.move(to: CGPoint(x: rect.midX, y: 0))
let relativeProgress = (max(min(progress, 1), 0) - 0.5) * 2
let radius = rect.width/2
let tgX = rect.midX+(relativeProgress * (radius*4/3))
path.addCurve(to: CGPoint(x: rect.midX, y: rect.maxY), control1: CGPoint(x: tgX, y: 0), control2: CGPoint(x: tgX, y: rect.maxY))
path.addArc(center: center, radius: rect.width/2, startAngle: .pi/2, endAngle: .pi*3/2, clockwise: false)
//path.closeSubpath()
let mask = CAShapeLayer()
mask.path = path
mask.fillColor = UIColor.white.cgColor
return mask
}
let moonLayer = CAShapeLayer()
moonLayer.path = UIBezierPath(ovalIn: rect).cgPath
moonLayer.fillColor = UIColor.clear.cgColor
moonLayer.strokeColor = UIColor.white.cgColor
moonLayer.lineWidth = 2
moonLayer.shadowColor = UIColor.white.cgColor
moonLayer.shadowOpacity = 1
moonLayer.shadowRadius = 10
moonLayer.shadowPath = moonLayer.path
moonLayer.shadowOffset = .zero
layer.addSublayer(moonLayer)
let moonPhase = moonMask(in: rect, forProgress: 0.3)
moonPhase.shadowColor = UIColor.white.cgColor
moonPhase.shadowOpacity = 1
moonPhase.shadowRadius = 10
moonPhase.shadowPath = moonLayer.path
moonPhase.shadowOffset = .zero
layer.addSublayer(moonPhase)
view
I have the following code that rounds an already existing rectangle from the scene builder...
btOk.path = UIBezierPath(roundedRect: CGRect(x: -62.5,y:-25,width: 125, height: 50), cornerRadius: 10).cgPath
However, if i try to use the same init to round the corners of another rectangle that is much larger, it does not even come close to working. It just makes the width HUUUUGE (imagine Trump).
scene.enumerateChildNodes(withName: "//*"){
node,stop in
if let name = node.name{
if name.contains("round"){
if let shapeNode = node as? SKShapeNode{
print(shapeNode.frame.width) //500
shapeNode.path = UIBezierPath(roundedRect: CGRect(x: -250,y:-100,width: 500, height: 200), cornerRadius: 50).cgPath
print(shapeNode.frame.width) //5735
}
}
}
}
btOk is a SKShapeNode as well. What am i missing between the two that is so different? One thing to note is i am enumerating through the children of the scene like this because this scene is in a SKReferenceNode. Perhaps that has something to do with it?
EDIT
Taking direction from #Ron Myschuk, i've solved this and since it's such a PITA, i also created an extension. So now i can round the corners of any SKShapeNode very easily when needed. Even if it was created in the scene editor. Note, this should only be used if there are no children of the shape node. Otherwise those children will be removed also.
extension SKShapeNode {
func roundCorners(topLeft:Bool,topRight:Bool,bottomLeft:Bool,bottomRight:Bool,radius: CGFloat,parent: SKNode){
let newNode = SKShapeNode(rect: self.frame)
newNode.fillColor = self.fillColor
newNode.lineWidth = self.lineWidth
newNode.position = self.position
newNode.name = self.name
self.removeFromParent()
parent.addChild(newNode)
var corners = UIRectCorner()
if topLeft { corners = corners.union(.bottomLeft) }
if topRight { corners = corners.union(.bottomRight) }
if bottomLeft { corners = corners.union(.topLeft) }
if bottomRight { corners = corners.union(.topRight) }
newNode.path = UIBezierPath(roundedRect: CGRect(x: -(newNode.frame.width / 2),y:-(newNode.frame.height / 2),width: newNode.frame.width, height: newNode.frame.height),byRoundingCorners: corners, cornerRadii: CGSize(width:radius,height:radius)).cgPath
}
}
And use it like so...
aShapeNode.roundCorners(topLeft: true, topRight: true, bottomLeft: false, bottomRight: false, radius: 5,parent: popup)
Not what you're going to want to hear but it's because you cannot set the width of an SKShapeNode in the Scene editor (To my knowledge). In order to get that ShapeNode to have a width of 500 you would have had to adjust the xScale. The xScale then reapplies itself to the path when you adjust it (kind of growing exponentially). If you create the SKShapeNode in code there is no problem adjust the rounded corners
let round = SKShapeNode(rect: CGRect(x: 0, y: -150, width: 500, height: 200))
round.fillColor = .red
addChild(round)
print(round.frame.width)
round.path = UIBezierPath(roundedRect: CGRect(x: -250, y: -100, width: 500, height: 200), cornerRadius: 50).cgPath
print(round.frame.width)
Edit
If you have your heart set on using the Scene editor you can place your ShapeNode and stretch it to where you want it then you could just do a small conversion in code to get the results that you want
if let round = self.childNode(withName: "biground") as? SKShapeNode {
let biground = SKShapeNode(rect: round.frame)
biground.fillColor = round.fillColor
biground.position = round.position
addChild(biground)
round.removeFromParent()
print(biground.frame.width)
biground.path = UIBezierPath(roundedRect: CGRect(x: -250, y: -100, width: 500, height: 200), cornerRadius: 50).cgPath
print(biground.frame.width)
}
this just recreates the shape in code based on what you outlined in the Scene editor and rounds the edges perfectly
edit 2
I've always been under the impression that SKShapeNodes are really inefficient (i'm pretty sure they leaked memory as well). So i always setup my round rectangles as so.
let outsideTexture = SKTexture(imageNamed: "round_square_white")
let outside = SKSpriteNode(texture: outsideTexture)
let insetX: CGFloat = 20
let insetY: CGFloat = 20
let cellSize = CGSize(width: 500.0, height: 500.0)
outside.centerRect = CGRect(x: CGFloat(insetX / outside.size.width), y: CGFloat(insetY / outside.size.height), width: CGFloat((outside.size.width - insetX * 2) / outside.size.width), height: CGFloat((outside.size.height - insetY * 2) / outside.size.height))
//outside.position = CGPointMake(gameModel.gameWidth / 2, (outside.size.height) / 2);
outside.xScale = cellSize.width / outside.size.width
outside.yScale = cellSize.height / outside.size.height
outside.zPosition = 10
outside.position = CGPoint(x: CGFloat(0), y: CGFloat(-0.35 * self.size.height / 2))
self.addChild(outside)
worth noting that this lays out a rounded square/rectangle perfectly however similar to the scale issues from the scene editor you have to place an empty cell over this to add children to, otherwise they scale to the rounded square.
My problem is that I created simple path with CABasicAnimation from circle to roundedRect. I simply use two cashapelayers for each shape with uibezierpath, and because circle can be showed as roundedrect I used it twice and added them onto view, and it is working like a charm on iphone 6 and above, but strange things happen with edges when im trying launch it on iphone 5 and below (see gif). Im struggling with it almost 2 days and have no clue. Btw. red circle is a button and it's above those shapes. Here is code:
class Shapes: CAShapeLayer {
var circleLayer : UIBezierPath {
return UIBezierPath(roundedRect: CGRect(x: -(buttonWidth/2), y: -(buttonHeight/2), width: buttonWidth, height: buttonHeight), cornerRadius: 15)
}
var roundedRectLayer: UIBezierPath {
return UIBezierPath(roundedRect: CGRect(x: -(frame.width/2), y: -(frame.height/2), width: frame.width, height: frame.height), cornerRadius: 20)
}
func openMenu(){
let openMenu: CABasicAnimation = CABasicAnimation(keyPath: "path")
openMenu.fromValue = circleLayer.cgPath
openMenu.toValue = roundedRectLayer.cgPath
openMenu.duration = 0.4
openMenu.beginTime = CACurrentMediaTime() + 0.2
openMenu.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
openMenu.fillMode = kCAFillModeForwards
openMenu.isRemovedOnCompletion = false
add(openMenu, forKey: "openMenu")
}
}
and this is instantiated in another class of uiview which is that white rect below, this way:
let shapes = Shapes()
layer.addSublayer(shapes)
shapes.frame = CGRect(x: redButton.frame.midX, y: redButton.frame.midY, width: 320, height: redButton.frame.height + 10)
iPhone 5:
iPhone 6:
I am using this code to move a UIImage along a curve:
// paint curve for sun
let path = UIBezierPath()
let imageSunName = "small_sun.png"
let imageSun = UIImage(named: imageSunName)
let imageView = UIImageView(image: imageSun!)
imageView.frame = CGRect(x: xStart, y: yStart, width: 24, height: 24)
self.view.addSubview(imageView)
path.moveToPoint(CGPoint(x: xStart,y: yStart))
path.addQuadCurveToPoint(CGPoint(x: xEnd, y: yEnd), controlPoint: CGPoint(x: xMiddleTop, y: yMiddleTop))
let animation = CAKeyframeAnimation(keyPath: "position")
animation.path = path.CGPath
animation.repeatCount = 0
animation.duration = 5.0
imageView.layer.addAnimation(animation, forKey: "animate position along path")
Nevertheless, two issues remain:
I would like to move the image only partly along the path (according to the current time vs sunrise/sunset) - how can this be done?
The image jumps to its origin position after the animation stopped - how can I avoid this?
Cheers
To avoid jump to its original position add:
animation.fillMode = kCAFillModeForwards
animation.removedOnCompletion = false
To avoid jumping on animation end, just before starting animation move your image layer to the end position:
imageView.layer.position = CGPoint(x: xEnd, y: yEnd)
To move image partly Im afraid that there is no easy way to do it. An alternate way would be by calculating the endPosition and a path based on sunset/sunrise so you don't have to mess things up with animation time at all
I want to draw a square in another square; but I can't position the second one in the right way.
What can I do for positioning based on first square coordinates?
var tileBackground = SKShapeNode(rectOfSize: CGSize(width: screenWidth, height: screenWidth))
tileBackground.name = "tileBackground"
tileBackground.fillColor = SKColor.whiteColor()
tileBackground.position = CGPoint(x: frame.midX, y: frame.midY);
self.addChild(tileBackground)
var tile = SKShapeNode(rectOfSize: CGSize(width: tileSize, height: tileSize))
tile.name = "tile1"
tile.fillColor = SKColor.redColor()
tile.position = CGPointMake(100,100)
tileBackground.addChild(tile)
You should use SKSpriteNode instead. That way you can add it easily and without setting the position manually. Because in an SKSpriteNode, the center is always the center of the node:
var tileBackground = SKSpriteNode(color: UIColor.whiteColor(), size: CGSizeMake(width: screenWidth, height: screenWidth))
tileBackground.name = "tileBackground"
tileBackground.position = CGPoint(x: frame.midX, y: frame.midY);
self.addChild(tileBackground)
var tile = SKSpriteNode(color: UIColor.redColor(), size: CGSize(width: tileSize, height: tileSize))
tile.name = "tile1"
tileBackground.addChild(tile)
A node's position is relative to its parent position.
If you want the tile node to be in the center of its parent then set its position as:
tile.position = CGPoint(x: tileBackground.size.width / 2.0, y: tileBackground.size.height / 2.0)
which will place the tile in center of the tileBackground node.
also note that you do not need to update the tile position to "follow" the tileBackground node. Updating the tileBackground position will automatically keep the tile in its center