I am attempting to do something that I thought would be possible, but have no idea how to start.
I have created a UIView and would like it to be filled with colour, but in the shape defined by an image mask. i.e. I have a PNG with alpha, and I would like the UIView I have created to be UIColor.blue in the shape of that PNG.
To show just how stupid I am, here is the absolute rubbish I have attempted so far - trying to generate just a simple square doesn't even work for me, hence it's all commented out.
let rocketColourList: [UIColor] = [UIColor.blue, UIColor.red, UIColor.green, UIColor.purple, UIColor.orange]
var rocketColourNum: Int = 0
var rocketAngleNum: Int = 0
var rocketAngle: Double {
return Double(rocketAngleNum) * Double.pi / 4
}
var rocketColour = UIColor.black
public func drawRocket (){
rocketColour.set()
self.clipsToBounds = true
self.backgroundColor = UIColor.red
imageView.image = UIImage(named: ("rocketMask"))
addSubview(imageView)
//maskimage.frame = self.frame
//let someRect = CGRect (x: 1, y: 1, width: 1000, height: 1000)
//let someRect = CGRect (self.frame)
//let fillPath = UIBezierPath(rect:someRect)
//fillPath.fill()
//setNeedsDisplay()
}
}
Set image as template, then set tint color for UIImageView. Something like that:
guard let let image = UIImage(named: "rocketMask")?.withRenderingMode(.alwaysTemplate) else { return }
imageView.image = image
imageView.tintColor = .blue
Also you can do that through the images assets:
Related
I have created a progressview according to number images as you can see in below code.
let view = UIView()
view.backgroundColor = .clear
let progressView = UIProgressView(frame: CGRect(x: 0, y: 0, width: frameOfParentView.width/3 - 8, height: 30))
progressView.progressViewStyle = .default
progressView.progress = 0.0
progressView.tintColor = .red
progressView.trackTintColor = .gray
progressView.layoutIfNeeded()
view.addSubview(progressView)
self.arrayOfProgrssView.append(progressView)
As you can see in gif at starting point tintColor alpha is little bit less but when it tense to reach at 100% it is fully red.
I also tried with below code:-
progressView.progressTintColor = .red
but did not get expected result.
To perform animation,
DispatchQueue.main.asyncAfter(deadline: .now() + 0.001) {
UIView.animate(withDuration: self.animationInMS) {
progressView.setProgress(1, animated: true)
}
}
progressView.layoutIfNeeded()
Issue in iOS 15:-
As you see below result with other colour.
Note:- I have checked in iOS 12.4 it's working properly as you can see into image.
Please let me know is anything require from my side.
Thanks in advance
This does appear to be "new behavior" where the alpha value matches the percent completion -- although, after some quick searching I haven't found any documentation on it.
One option as a work-around: set the .progressImage instead of the tint color.
So, use your favorite code to generate a solid-color image, such as:
extension UIImage {
public static func withColor(_ color: UIColor, size: CGSize = CGSize(width: 1, height: 1)) -> UIImage {
let format = UIGraphicsImageRendererFormat()
format.scale = 1
let image = UIGraphicsImageRenderer(size: size, format: format).image { rendererContext in
color.setFill()
rendererContext.fill(CGRect(origin: .zero, size: size))
}
return image
}
}
Then, instead of:
progressView.tintColor = .red
use:
let img = UIImage.withColor(.red)
progressView.progressImage = img
Not fully tested, but to avoid the need to change existing code, you might also try:
extension UIProgressView {
open override var tintColor: UIColor! {
didSet {
let img = UIImage.withColor(tintColor)
progressImage = img
}
}
}
Now you can keep your existing progressView.tintColor = .red
I wonder if it even possible in iOS to animate changing color in only a part of the text, preferably not char by char, but pixel by pixel, like on this picture?
I know how to change text color in static with NSAttributedString and I know how to animate the whole text with CADisplayLink, but this makes me worry.
Maybe I can dive into CoreText, but I'm still not sure it is possible even with it. Any thoughts?
UPD I decided to add a video with my first results to make the question more clear:
my efforts for now (the label is overlapping)
You can quite easily achieve this using CoreAnimation possibilities.
I've added a simple demo, you play with it here (just build the project and tap anywhere to see the animation).
The logic is the following:
Create a custom subclass of UIView.
When some text is set, create two similar CATextLayers, each with the same text and frame.
Set different foregroundColor and mask for those layers. The mask of the left layer will be the left part of the view, and the mask of the right layer will be the right part.
Animate foregroundColor for those layers (simultaneously).
The code of a custom view:
class CustomTextLabel: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = .green
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private var textLayer1: CATextLayer?
private var textLayer2: CATextLayer?
func setText(_ text: String, fontSize: CGFloat) {
// create 2 layers with the same text and size, we'll set the colors for them later
textLayer1 = createTextLayer(text, fontSize: fontSize)
textLayer2 = createTextLayer(text, fontSize: fontSize)
// estimate the frame size needed for the text layer with such text and font size
let textSize = textLayer1!.preferredFrameSize()
let w = frame.width, h = frame.height
// calculate the frame such that both layers will be in center of view
let centeredTextFrame = CGRect(x: (w-textSize.width)/2, y: (h-textSize.height)/2, width: textSize.width, height: textSize.height)
textLayer1!.frame = centeredTextFrame
textLayer2!.frame = centeredTextFrame
// set up default color for the text
textLayer1!.foregroundColor = UIColor.yellow.cgColor
textLayer2!.foregroundColor = UIColor.yellow.cgColor
// set background transparent, that's very important
textLayer1!.backgroundColor = UIColor.clear.cgColor
textLayer2!.backgroundColor = UIColor.clear.cgColor
// set up masks, such that each layer's text is visible only in its part
textLayer1!.mask = createMaskLayer(CGRect(x: 0, y: 0, width: textSize.width/2, height: textSize.height))
textLayer2!.mask = createMaskLayer(CGRect(x: textSize.width/2, y: 0, width: textSize.width/2, height: textSize.height))
layer.addSublayer(textLayer1!)
layer.addSublayer(textLayer2!)
}
private var finishColor1: UIColor = .black, finishColor2: UIColor = .black
func animateText(leftPartColor1: UIColor, leftPartColor2: UIColor, rightPartColor1: UIColor, rightPartColor2: UIColor) {
finishColor1 = leftPartColor2
finishColor2 = rightPartColor2
if let layer1 = textLayer1, let layer2 = textLayer2 {
CATransaction.begin()
let animation1 = CABasicAnimation(keyPath: "foregroundColor")
animation1.fromValue = leftPartColor1.cgColor
animation1.toValue = leftPartColor2.cgColor
animation1.duration = 3.0
layer1.add(animation1, forKey: "animation1")
let animation2 = CABasicAnimation(keyPath: "foregroundColor")
animation2.fromValue = rightPartColor1.cgColor
animation2.toValue = rightPartColor2.cgColor
animation2.duration = 3.0
layer2.add(animation2, forKey: "animation2")
CATransaction.setCompletionBlock {
self.textLayer1?.foregroundColor = self.finishColor1.cgColor
self.textLayer2?.foregroundColor = self.finishColor2.cgColor
}
CATransaction.commit()
}
}
private func createTextLayer(_ text: String, fontSize: CGFloat) -> CATextLayer {
let textLayer = CATextLayer()
textLayer.string = text
textLayer.fontSize = fontSize // TODO: also set font name
textLayer.contentsScale = UIScreen.main.scale
return textLayer
}
private func createMaskLayer(_ holeRect: CGRect) -> CAShapeLayer {
let layer = CAShapeLayer()
let path = CGMutablePath()
path.addRect(holeRect)
path.addRect(bounds)
layer.path = path
layer.fillRule = CAShapeLayerFillRule.evenOdd
layer.opacity = 1
return layer
}
}
The calls of a custom view:
class ViewController: UIViewController {
var customLabel: CustomTextLabel!
override func viewDidLoad() {
super.viewDidLoad()
let viewW = view.frame.width, viewH = view.frame.height
let labelW: CGFloat = 200, labelH: CGFloat = 50
customLabel = CustomTextLabel(frame: CGRect(x: (viewW-labelW)/2, y: (viewH-labelH)/2, width: labelW, height: labelH))
customLabel.setText("Optimizing...", fontSize: 20)
view.addSubview(customLabel)
let tapRecogniner = UITapGestureRecognizer(target: self, action: #selector(onTap))
view.addGestureRecognizer(tapRecogniner)
}
#objc func onTap() {
customLabel.animateText(leftPartColor1: UIColor.blue,
leftPartColor2: UIColor.red,
rightPartColor1: UIColor.white,
rightPartColor2: UIColor.black)
}
}
Thanks to Olha's (#OlhaPavliuk) answer, I used two CATextLayer shapes and two CAShapeLayer masks for text layers. In draw method I just change masks frames to calculated size (bounds.width * progress value), and also change the second mask origin to a new start (bounds.width - bounds.width * progress value).
Also, it was very important to set layer.fillRule = CAShapeLayerFillRule.evenOdd while creating a mask, so that both layers became visible.
It turned out that I actually didn't need any animation code involved, because changing frames looks just ok.
In motion: https://giphy.com/gifs/LMbmlMoxY9oaWhXfO1
Full code: https://gist.github.com/joliejuly/a792c2ab8d97d304d731a4a5202f741a
I have a UIImage which is an outline, and one which is filled, both were created from OpenCV, one from grab cut and the other from structuring element.
my two images are like this:
I am trying to change all of the white pixels in the outlined image because I want to merge the two images together so I end up with a red outline and a white filled area in the middle. I am using this to merge the two together, and I am aware instead of red it will be a pink kind of colour and a grey instead of white since I am just blending them together with alpha.
// Start an image context
UIGraphicsBeginImageContext(grabcutResult.size)
// Create rect for this draw session
let rect = CGRect(x: 0.0, y: 0.0, width: grabcutResult.size.width, height: grabcutResult.size.height)
grabcutResult.draw(in: rect)
redGrabcutOutline.draw(in: rect, blendMode: .normal, alpha: 0.5)
let finalImage = UIGraphicsGetImageFromCurrentImageContext()
and the idea is it should look something like this.
I want to be able to complete this operation quickly but the only solutions I have found are either for ImageView (which only affects how stuff is rendered not the underlying UIImage) or they involve looping over the entire image pixel by pixel.
I am trying to find a solution that will just mask all the white pixels in the outline to red without having to loop over the entire image pixel by pixel as it is too slow.
Ideally it would be good if I could get openCV to just return a red outline instead of white but I don't think its possible to change this (maybe im wrong).
Using swift btw... but any Help is appreciated, thanks in advance.
This may work for you - using only Swift code...
extension UIImage {
func maskWithColor(color: UIColor) -> UIImage? {
let maskingColors: [CGFloat] = [1, 255, 1, 255, 1, 255]
let bounds = CGRect(origin: .zero, size: size)
let maskImage = cgImage!
var returnImage: UIImage?
// make sure image has no alpha channel
let rFormat = UIGraphicsImageRendererFormat()
rFormat.opaque = true
let renderer = UIGraphicsImageRenderer(size: size, format: rFormat)
let noAlphaImage = renderer.image {
(context) in
self.draw(at: .zero)
}
let noAlphaCGRef = noAlphaImage.cgImage
if let imgRefCopy = noAlphaCGRef?.copy(maskingColorComponents: maskingColors) {
let rFormat = UIGraphicsImageRendererFormat()
rFormat.opaque = false
let renderer = UIGraphicsImageRenderer(size: size, format: rFormat)
returnImage = renderer.image {
(context) in
context.cgContext.clip(to: bounds, mask: maskImage)
context.cgContext.setFillColor(color.cgColor)
context.cgContext.fill(bounds)
context.cgContext.draw(imgRefCopy, in: bounds)
}
}
return returnImage
}
}
This extension returns a UIImage with white replaced with the passed UIColor, and the black "background" changed to transparent.
Use it in this manner:
// change filled white star to gray with transparent background
let modFilledImage = filledImage.maskWithColor(color: UIColor(red: 200, green: 200, blue: 200))
// change outlined white star to red with transparent background
let modOutlineImage = outlineImage.maskWithColor(color: UIColor.red)
// combine the images on a black background
Here is a full example, using your two original images (most of the code is setting up image views to show the results):
extension UIImage {
func maskWithColor(color: UIColor) -> UIImage? {
let maskingColors: [CGFloat] = [1, 255, 1, 255, 1, 255]
let bounds = CGRect(origin: .zero, size: size)
let maskImage = cgImage!
var returnImage: UIImage?
// make sure image has no alpha channel
let rFormat = UIGraphicsImageRendererFormat()
rFormat.opaque = true
let renderer = UIGraphicsImageRenderer(size: size, format: rFormat)
let noAlphaImage = renderer.image {
(context) in
self.draw(at: .zero)
}
let noAlphaCGRef = noAlphaImage.cgImage
if let imgRefCopy = noAlphaCGRef?.copy(maskingColorComponents: maskingColors) {
let rFormat = UIGraphicsImageRendererFormat()
rFormat.opaque = false
let renderer = UIGraphicsImageRenderer(size: size, format: rFormat)
returnImage = renderer.image {
(context) in
context.cgContext.clip(to: bounds, mask: maskImage)
context.cgContext.setFillColor(color.cgColor)
context.cgContext.fill(bounds)
context.cgContext.draw(imgRefCopy, in: bounds)
}
}
return returnImage
}
}
class MaskWorkViewController: UIViewController {
let origFilledImgView: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.contentMode = .center
return v
}()
let origOutlineImgView: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.contentMode = .center
return v
}()
let modifiedFilledImgView: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.contentMode = .center
return v
}()
let modifiedOutlineImgView: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.contentMode = .center
return v
}()
let combinedImgView: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.contentMode = .center
return v
}()
let origStack: UIStackView = {
let v = UIStackView()
v.translatesAutoresizingMaskIntoConstraints = false
v.axis = .horizontal
v.spacing = 20
return v
}()
let modifiedStack: UIStackView = {
let v = UIStackView()
v.translatesAutoresizingMaskIntoConstraints = false
v.axis = .horizontal
v.spacing = 20
return v
}()
let mainStack: UIStackView = {
let v = UIStackView()
v.translatesAutoresizingMaskIntoConstraints = false
v.axis = .vertical
v.alignment = .center
v.spacing = 10
return v
}()
override func viewDidLoad() {
super.viewDidLoad()
guard let filledImage = UIImage(named: "StarFill"),
let outlineImage = UIImage(named: "StarEdge") else {
return
}
var modifiedFilledImage: UIImage = UIImage()
var modifiedOutlineImage: UIImage = UIImage()
var combinedImage: UIImage = UIImage()
// for both original images, replace white with color
// and make black transparent
if let modFilledImage = filledImage.maskWithColor(color: UIColor(red: 200, green: 200, blue: 200)),
let modOutlineImage = outlineImage.maskWithColor(color: UIColor.red) {
modifiedFilledImage = modFilledImage
modifiedOutlineImage = modOutlineImage
let rFormat = UIGraphicsImageRendererFormat()
rFormat.opaque = true
let renderer = UIGraphicsImageRenderer(size: modifiedFilledImage.size, format: rFormat)
// combine modified images on black background
combinedImage = renderer.image {
(context) in
context.cgContext.setFillColor(UIColor.black.cgColor)
context.cgContext.fill(CGRect(origin: .zero, size: modifiedFilledImage.size))
modifiedFilledImage.draw(at: .zero)
modifiedOutlineImage.draw(at: .zero)
}
}
// setup image views and set .image properties
setupUI(filledImage.size)
origFilledImgView.image = filledImage
origOutlineImgView.image = outlineImage
modifiedFilledImgView.image = modifiedFilledImage
modifiedOutlineImgView.image = modifiedOutlineImage
combinedImgView.image = combinedImage
}
func setupUI(_ imageSize: CGSize) -> Void {
origStack.addArrangedSubview(origFilledImgView)
origStack.addArrangedSubview(origOutlineImgView)
modifiedStack.addArrangedSubview(modifiedFilledImgView)
modifiedStack.addArrangedSubview(modifiedOutlineImgView)
var lbl = UILabel()
lbl.textAlignment = .center
lbl.text = "Original Images"
mainStack.addArrangedSubview(lbl)
mainStack.addArrangedSubview(origStack)
lbl = UILabel()
lbl.textAlignment = .center
lbl.numberOfLines = 0
lbl.text = "Modified Images\n(UIImageViews have Green Background)"
mainStack.addArrangedSubview(lbl)
mainStack.addArrangedSubview(modifiedStack)
lbl = UILabel()
lbl.textAlignment = .center
lbl.text = "Combined on Black Background"
mainStack.addArrangedSubview(lbl)
mainStack.addArrangedSubview(combinedImgView)
view.addSubview(mainStack)
NSLayoutConstraint.activate([
mainStack.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 20.0),
mainStack.centerXAnchor.constraint(equalTo: view.centerXAnchor, constant: 0.0),
])
[origFilledImgView, origOutlineImgView, modifiedFilledImgView, modifiedOutlineImgView, combinedImgView].forEach {
$0.backgroundColor = .green
NSLayoutConstraint.activate([
$0.widthAnchor.constraint(equalToConstant: imageSize.width),
$0.heightAnchor.constraint(equalToConstant: imageSize.height),
])
}
}
}
And the result, showing the original, modified and final combined image... Image views have green backgrounds to show the transparent areas:
The idea is to bitwise-or the two masks together which "merges" the two masks. Since this new combined grayscale image is still a single (1-channel) image, we need to convert it to a 3-channel so we can apply color to the image. Finally, we color the outline mask with red to get our result
I implemented it in Python OpenCV but you can adapt the same idea with Swift
import cv2
# Read in images as grayscale
full = cv2.imread('1.png', 0)
outline = cv2.imread('2.png', 0)
# Bitwise-or masks
combine = cv2.bitwise_or(full, outline)
# Combine to 3 color channel and color outline red
combine = cv2.merge([combine, combine, combine])
combine[outline > 120] = (57,0,204)
cv2.imshow('combine', combine)
cv2.waitKey()
Benchmarks using IPython
In [3]: %timeit combine()
782 µs ± 10.4 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
Using the Vectorized feature of Numpy, it seems to be pretty fast
try this:
public func maskWithColor2( color:UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size, false, UIScreen.main.scale)
let context = UIGraphicsGetCurrentContext()!
color.setFill()
context.translateBy(x: 0, y: self.size.height)
context.scaleBy(x: 1.0, y: -1.0)
let rect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
context.draw(self.cgImage!, in: rect)
context.setBlendMode(CGBlendMode.sourceIn)
context.addRect(rect)
context.drawPath(using: CGPathDrawingMode.fill)
let coloredImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return coloredImage!
}
I have some strange behaviour of CAEmitterCell color property or I don't understand it right.
I have a cell
let cell = CAEmitterCell()
With content of simple .png file which is drawn black
cell.contents = UIImage(named: "particle")?.cgImage
And I try to change it to green
cell.color = UIColor.green.cgColor
But it is still rendered black.
I tried to change "Render as" property of this image to "Template imagr" in media asset but it has no effect.
Can anyone help me to understand what I'm doing wrong?
Ok, the case was the color of initial image: the darker the image - the less color variation you have. So better use white images for your particle emitters %)
This is simple example how you can change color of the CAEmitterCell.
class ViewController: UIViewController {
override func viewDidAppear(_ animated: Bool) {
createParticles()
}
func createParticles() {
let particleEmitter = CAEmitterLayer()
particleEmitter.emitterPosition = CGPoint(x: view.center.x, y: -96)
particleEmitter.emitterShape = kCAEmitterLayerLine
particleEmitter.emitterSize = CGSize(width: view.frame.size.width, height: 1)
let red = makeEmitterCell(color: UIColor.red)
let green = makeEmitterCell(color: UIColor.green)
let blue = makeEmitterCell(color: UIColor.blue)
particleEmitter.emitterCells = [red, green, blue]
view.layer.addSublayer(particleEmitter)
}
func makeEmitterCell(color: UIColor) -> CAEmitterCell {
let cell = CAEmitterCell()
cell.birthRate = 3
cell.lifetime = 7.0
cell.lifetimeRange = 0
cell.color = color.cgColor
cell.velocity = 200
cell.velocityRange = 50
cell.emissionLongitude = CGFloat.pi
cell.emissionRange = CGFloat.pi / 4
cell.spin = 2
cell.spinRange = 3
cell.scaleRange = 0.5
cell.scaleSpeed = -0.05
cell.contents = UIImage(named: "images")?.cgImage
return cell
}
}
And example of the animation.
I want to create a circle with an inner circle that looks like the image below. I'm having trouble with the inner circle and I don't know how to create it so it's easy to adjust percentage (like the image is showing).
So far I have this CircleGraph class which can draw the ouster circle and an inner circle which can only draw 50 %.
import Foundation
import UIKit
class CircleGraph: UIView
{
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect)
{
super.drawRect(rect)
// Outer circle
Colors().getMainColor().setFill()
let outerPath = UIBezierPath(ovalInRect: rect)
outerPath.fill()
// inner circle so far
let percentage = 0.5
UIColor.whiteColor().setFill()
let circlePath = UIBezierPath(arcCenter: CGPoint(x: rect.height/2,y: rect.height/2), radius: CGFloat(rect.height/2), startAngle: CGFloat(-M_PI_2), endAngle:CGFloat(M_PI * 2 * percentage - M_PI_2), clockwise: true)
circlePath.fill()
}
}
Can anyone assist me?
What I want is something simliar to the image below:
I would go for the easy solution and create a UIView with a UIView and UILabel as subviews. If you use something like:
// To make it round
let width = self.frame.width
self.view.layer.cornerRadius = width * 0.5
self.view.layer.masksToBounds = true
for each of the sublayers. If you have set the background colour of the UIView's background layer to something like Red and the UIView layer above to have a whiteish background colour with alpha 0.5 than you already achieve this effect.
If you do not know how to proceed with this tip ill try to provide a code sample.
-- EDIT --
Here is the code sample:
import UIKit
class CircleView: UIView {
var percentage : Int?
var transparency : CGFloat?
var bottomLayerColor : UIColor?
var middleLayerColor : UIColor?
init(frame : CGRect, percentage : Int, transparency : CGFloat, bottomLayerColor : UIColor, middleLayerColor : UIColor) {
super.init(frame : frame)
self.percentage = percentage
self.transparency = transparency
self.bottomLayerColor = bottomLayerColor
self.middleLayerColor = middleLayerColor
viewDidLoad()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
viewDidLoad()
}
func viewDidLoad() {
let width = self.frame.width
let height = self.frame.height
let textFrame = CGRectMake(0, 0, width, height)
guard let percentage = self.percentage
else {
print("Error")
return
}
let newHeight = (CGFloat(percentage)/100.0)*height
let middleFrame = CGRectMake(0,height - newHeight, width, newHeight)
// Set Background Color
if let bottomLayerColor = self.bottomLayerColor {
self.backgroundColor = bottomLayerColor
}
// Make Bottom Layer Round
self.layer.cornerRadius = width * 0.5
self.layer.masksToBounds = true
// Create Middle Layer
let middleLayer = UIView(frame: middleFrame)
if let middleLayerColor = self.middleLayerColor {
middleLayer.backgroundColor = middleLayerColor
}
if let transparency = self.transparency {
middleLayer.alpha = transparency
}
// The Label
let percentageLayer = UILabel(frame: textFrame)
percentageLayer.textAlignment = NSTextAlignment.Center
percentageLayer.textColor = UIColor.whiteColor()
if let percentage = self.percentage {
percentageLayer.text = "\(percentage)%"
}
// Add Subviews
self.addSubview(middleLayer)
self.addSubview(percentageLayer)
}
}
To use in a View Controller:
let redColor = UIColor.redColor()
let blueColor = UIColor.blueColor()
let frame = CGRectMake(50, 50, 100, 100)
// 50% Example
let circleView = CircleView(frame: frame, percentage: 50, transparency: 0.5, bottomLayerColor: redColor, middleLayerColor: blueColor)
self.view.addSubview(circleView)
// 33% Example
let newFrame = CGRectMake(50, 150, 120, 120)
let newCircleView = CircleView(frame: newFrame, percentage: 33, transparency: 0.7, bottomLayerColor: UIColor.redColor(), middleLayerColor: UIColor.whiteColor())
self.view.addSubview(newCircleView)
This will yield something like this: