I have a case very similar to Draw circle with UIBezierPath
I have this path with UIBezierPath
Just taking focus in the gray circle:
grayView = UIView(frame: CGRect(x: screenWidth * 0.15,
y: 150,
width: screenWidth * 0.7,
height: screenWidth * 0.7 ))
let layer = CAShapeLayer()
layer.strokeColor = UIColor.gray.cgColor
layer.fillColor = UIColor.clear.cgColor
layer.lineWidth = 32
let path = UIBezierPath()
path.addCircle(center: CGPoint(x: grayView.bounds.width / 2,
y: grayView.bounds.height / 2),
radius: screenWidth/3.5,
startAngle: 125,
circlePercentage: 0.8)
layer.path = path.cgPath
grayView.layer.addSublayer(layer)
grayView.setNeedsLayout()
What I'm trying to do is modify the start and the end of the curved gray line and make a rounded start/end, like this:
Can someone help me?
Set the lineCap of the shape layer to .round.
Related
I have ticket View like this
.
My method is I have 2 view, 1 is the ticket itself, and other is for shadow. I have to do this because if I mask the view, it got clipped and the shadow will not appear in the ticket view.
here is the code for create the ticket view:
let shapeLayer = CAShapeLayer()
shapeLayer.frame = someView.bounds
shapeLayer.path = UIBezierPath(roundedRect: someView.bounds,
byRoundingCorners: [UIRectCorner.bottomLeft,UIRectCorner.bottomRight] ,
cornerRadii: CGSize(width: 5.0, height: 5.0)).cgPath
let rect = CGRect(x:0, y:0, width:200, height:100)
let cornerRadius:CGFloat = 5
let subPathSideSize:CGFloat = 25
let path = UIBezierPath(roundedRect: rect, cornerRadius: cornerRadius)
let leftSubPath = UIBezierPath(arcCenter: CGPoint(x: rect.width / 2, y: 0),
radius: subPathSideSize / 2, startAngle: .pi, endAngle: .pi * 0, clockwise: false)
leftSubPath.close()
let rightSubPath = UIBezierPath(arcCenter: CGPoint(x: rect.width / 2, y: rect.height),
radius: subPathSideSize / 2, startAngle: .pi, endAngle: .pi * 0, clockwise: true)
rightSubPath.close()
path.append(leftSubPath)
path.append(rightSubPath.reversing())
let mask = CAShapeLayer()
mask.frame = shapeLayer.bounds
mask.path = path.cgPath
someView.layer.mask = mask
Notes: SomeView is the TicketView.
And here is the code for adding shadow:
let shadowMask = CAShapeLayer()
shadowMask.frame = shadowView.bounds
shadowMask.path = path.cgPath
shadowMask.shadowOpacity = 0.2
shadowMask.shadowRadius = 4
shadowMask.masksToBounds = false
shadowMask.shadowOffset = CGSize(width: 0, height: 2)
shadowView.backgroundColor = UIColor.clear
shadowView.layer.addSublayer(shadowMask)
The shadow makes arc/rounded corner have border like this one (marked with circle red).
Here is my Playground gist
Do you know how to remove the border in the rounded corner and arc path?
Thank you.
u need to add clipToBounds in this block that you have written.
let mask = CAShapeLayer()
mask.frame = shapeLayer.bounds
mask.path = path.cgPath
someView.clipsToBounds = true
someView.layer.mask = mask
So I think there is different calculation for corner in mask and path. So I used fillColor of the shadowLayer to match the color of the CouponView. And now, the borders are gone.
shadowLayer.fillColor = someView.backgroundColor.cgColor
I want to fill half of a circle's border using UIBazierpath with gradient color.
Initially I tried with the full circle but it's not working, the gradient always fills the circle but not the border. Is there any way to do this?
Here's what I have so far:
let path = UIBezierPath(roundedRect: rect, cornerRadius: rect.width/2)
let shape = CAShapeLayer()
shape.path = path.cgPath
shape.lineWidth = 2.0
shape.strokeColor = UIColor.black.cgColor
self.layer.addSublayer(shape)
let gradient = CAGradientLayer()
gradient.frame = path.bounds
gradient.colors = [UIColor.magenta.cgColor, UIColor.cyan.cgColor]
let shapeMask = CAShapeLayer()
shapeMask.path = path.cgPath
gradient.mask = shapeMask
shapeMask.lineWidth = 2
self.layer.addSublayer(gradient)
Edit: Added the image. I want to achieve something like this.
Core graphics doesn't support an axial gradient so you need to draw this out in a more manual way.
Here's a custom view class that draws a circle using the range of HSV colors around the circumference.
class RadialCircleView: UIView {
override func draw(_ rect: CGRect) {
let thickness: CGFloat = 20
let center = CGPoint(x: bounds.midX, y: bounds.midY)
let radius = min(bounds.width, bounds.height) / 2 - thickness / 2
var last: CGFloat = 0
for a in 1...360 {
let ang = CGFloat(a) / 180 * .pi
let arc = UIBezierPath(arcCenter: center, radius: radius, startAngle: last, endAngle: ang, clockwise: true)
arc.lineWidth = thickness
last = ang
UIColor(hue: CGFloat(a) / 360, saturation: 1, brightness: 1, alpha: 1).set()
arc.stroke()
}
}
}
let radial = RadialCircleView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
radial.backgroundColor = UIColor(red: 0.98, green: 0.92, blue: 0.84, alpha: 1) // "antique white"
Copy this into a playground to experiment with the results. The colors don't exactly match your image but it may meet your needs.
This is my first time asking a question, so pardon me if it not very thorough.
Basically I am trying to apply a gradient layer on top of a UIBezierPath that is drawn as a graph.
Here is my graph:
Here is the gradient layer I am going for:
Here is what I have tried to draw my graph:
let path = quadCurvedPathWithPoints(points: points)
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
shapeLayer.strokeColor = UIColor.blue.cgColor
shapeLayer.fillColor = UIColor.white.cgColor
shapeLayer.position = CGPoint(x: 0, y: 0)
shapeLayer.lineWidth = 1.0
This fills the graph with a blue stroke, obviously, but now I am trying to apply the white to green gradient. The way I am doing it is not working. Here is the result:
Here is the code I am struggling with:
let startColor = UIColor.white.withAlphaComponent(0.5)
let endColor = UIColor.green
let gradient = CAGradientLayer()
gradient.colors = [startColor.cgColor, endColor.cgColor]
gradient.startPoint = CGPoint(x: 0.0, y: 0.5)
gradient.endPoint = CGPoint(x: 1.0, y: 0.5)
gradient.frame = path.bounds
let shapeMask = CAShapeLayer()
shapeMask.path = path.cgPath
gradient.mask = shapeLayer
sparkLineView.layer.addSublayer(gradient)
Here's a little demo that draws a UIBezierPath path using a gradient. You can copy this into a Swift playground.
class GradientGraph: UIView {
override func draw(_ rect: CGRect) {
// Create the "graph"
let path = UIBezierPath()
path.move(to: CGPoint(x: 0, y: frame.height * 0.5))
path.addLine(to: CGPoint(x: frame.width * 0.2, y: frame.height * 0.3))
path.addLine(to: CGPoint(x: frame.width * 0.4, y: frame.height * 0.8))
path.addLine(to: CGPoint(x: frame.width * 0.6, y: frame.height * 0.4))
path.addLine(to: CGPoint(x: frame.width * 0.8, y: frame.height * 0.7))
// Create the gradient
let gradient = CGGradient(colorsSpace: nil, colors: [UIColor.white.cgColor,UIColor.green.cgColor] as CFArray, locations: nil)!
// Draw the graph and apply the gradient
let ctx = UIGraphicsGetCurrentContext()!
ctx.setLineWidth(6)
ctx.saveGState()
ctx.addPath(path.cgPath)
ctx.replacePathWithStrokedPath()
ctx.clip()
ctx.drawLinearGradient(gradient, start: CGPoint(x: 0, y: 0), end: CGPoint(x: frame.width, y: 0), options: [])
ctx.restoreGState()
}
}
let graph = GradientGraph(frame: CGRect(x: 0, y: 0, width: 700, height: 700))
I have a UIBezierPath thats a rounded square. It somewhat looks like this:
Here's my code for the shape:
let shape = SKShapeNode()
shape.path = UIBezierPath(roundedRect: CGRect(x:(0), y: (0), width: (250), height: (400)), cornerRadius: 64).cgPath
shape.position = CGPoint(x: 0, y: 0)
print(shape.position)
shape.fillColor = UIColor.white
shape.strokeColor = UIColor.white
shape.lineWidth = 5
addChild(shape)
I want to center it in the middle of the screen, but using
shape.position = CGPoint(x: self.frame.width, y: self.frame.height)
doesn't work. Thanks!
I suggest that you center the UIBezierPath within the shape node. For example,
let width:CGFloat = 250
let height:CGFloat = 400
shape.path = UIBezierPath(roundedRect: CGRect(x:-width/2, y: -height/2, width: width, height: height), cornerRadius: 64).cgPath
You can center the shape in the scene by setting its position to (0, 0).
I have a strange question. Even though I did read a lot of tutorials on how to do this, the final result only shows the bezier line, not any shadow whatsoever. My code is pretty simple :
let borderLine = UIBezierPath()
borderLine.moveToPoint(CGPoint(x:0, y: y! - 1))
borderLine.addLineToPoint(CGPoint(x: x!, y: y! - 1))
borderLine.lineWidth = 2
UIColor.blackColor().setStroke()
borderLine.stroke()
let shadowLayer = CAShapeLayer()
shadowLayer.shadowOpacity = 1
shadowLayer.shadowOffset = CGSize(width: 0,height: 1)
shadowLayer.shadowColor = UIColor.redColor().CGColor
shadowLayer.shadowRadius = 1
shadowLayer.masksToBounds = false
shadowLayer.shadowPath = borderLine.CGPath
self.layer.addSublayer(shadowLayer)
What am I doing wrong as I dont seem to see anything wrong but of course I am wrong since no shadow appears. The function is drawRect, basic UIVIew no extra anything in there, x and y are the width and height of the frame. Many thanks in advance!
I take this example straight from my PaintCode-app. Hope this helps.
//// General Declarations
let context = UIGraphicsGetCurrentContext()
//// Shadow Declarations
let shadow = UIColor.blackColor()
let shadowOffset = CGSizeMake(3.1, 3.1)
let shadowBlurRadius: CGFloat = 5
//// Bezier 2 Drawing
var bezier2Path = UIBezierPath()
bezier2Path.moveToPoint(CGPointMake(30.5, 90.5))
bezier2Path.addLineToPoint(CGPointMake(115.5, 90.5))
CGContextSaveGState(context)
CGContextSetShadowWithColor(context, shadowOffset, shadowBlurRadius, (shadow as UIColor).CGColor)
UIColor.blackColor().setStroke()
bezier2Path.lineWidth = 1
bezier2Path.stroke()
CGContextRestoreGState(context)
I prefer the way to add a shadow-sublayer. You can easily use the following function (Swift 3.0):
func createShadowLayer() -> CALayer {
let shadowLayer = CALayer()
shadowLayer.shadowColor = UIColor.red.cgColor
shadowLayer.shadowOffset = CGSize.zero
shadowLayer.shadowRadius = 5.0
shadowLayer.shadowOpacity = 0.8
shadowLayer.backgroundColor = UIColor.clear.cgColor
return shadowLayer
}
And finally, you just add it to your line path (CAShapeLayer):
let line = CAShapeLayer()
let path = UIBezierPath()
path.move(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: 50, y: 100))
path.addLine(to: CGPoint(x: 100, y: 50))
line.path = path.cgPath
line.strokeColor = UIColor.blue.cgColor
line.fillColor = UIColor.clear.cgColor
line.lineWidth = 2.0
view.layer.addSublayer(line)
let shadowSubLayer = createShadowLayer()
shadowSubLayer.insertSublayer(line, at: 0)
view.layer.addSublayer(shadowSubLayer)
I am using the shadow properties of my shape layer to add shadow to it. The best part of this approach is that I don't have to provide a path explicitly. The shadow follows the path of the layer. I am also animating the layer by changing path. In that case too the shadow animates seamlessly without a single line of code.
Here is what I am doing (Swift 4.2)
shapeLayer.path = curveShapePath(postion: initialPosition)
shapeLayer.strokeColor = UIColor.clear.cgColor
shapeLayer.fillColor = shapeBackgroundColor
self.layer.addSublayer(shapeLayer)
if shadow {
shapeLayer.shadowRadius = 5.0
shapeLayer.shadowColor = UIColor.gray.cgColor
shapeLayer.shadowOpacity = 0.8
}
The curveShapePath method is the one that returns the path and is defined as follows:
func curveShapePath(postion: CGFloat) -> CGPath {
let height: CGFloat = 37.0
let path = UIBezierPath()
path.move(to: CGPoint(x: 0, y: 0)) // start top left
path.addLine(to: CGPoint(x: (postion - height * 2), y: 0)) // the beginning of the trough
// first curve down
path.addCurve(to: CGPoint(x: postion, y: height),
controlPoint1: CGPoint(x: (postion - 30), y: 0), controlPoint2: CGPoint(x: postion - 35, y: height))
// second curve up
path.addCurve(to: CGPoint(x: (postion + height * 2), y: 0),
controlPoint1: CGPoint(x: postion + 35, y: height), controlPoint2: CGPoint(x: (postion + 30), y: 0))
// complete the rect
path.addLine(to: CGPoint(x: self.frame.width, y: 0))
path.addLine(to: CGPoint(x: self.frame.width, y: self.frame.height))
path.addLine(to: CGPoint(x: 0, y: self.frame.height))
path.close()
return path.cgPath
}