I'm trying to set the frame of some CALayers but when I run this code they appear shifted to the right.
The frame coordinates and the shadows are correct.
I use this class as a UIView class from a view in storyboard.
class Shadows: UIView {
let darkShadow = CALayer()
let lightShadow = CALayer()
override init(frame: CGRect) {
super.init(frame: frame)
}
override func layoutSublayers(of layer: CALayer) {
super.layoutSublayers(of: layer)
shadows()
}
private func shadows() {
let cornerRadius: CGFloat = 30
let shadowRadius: CGFloat = 8
layer.cornerRadius = cornerRadius
layer.masksToBounds = false
darkShadow.frame = frame
darkShadow.backgroundColor = UIColor.white.cgColor
darkShadow.shadowColor = UIColor.black.cgColor
darkShadow.cornerRadius = cornerRadius
darkShadow.shadowOffset = CGSize(width: shadowRadius, height: shadowRadius)
darkShadow.shadowOpacity = 0.2
darkShadow.shadowRadius = shadowRadius
layer.insertSublayer(darkShadow, at: 0)
lightShadow.frame = frame
lightShadow.backgroundColor = UIColor.white.cgColor
lightShadow.shadowColor = UIColor.white.cgColor
lightShadow.cornerRadius = cornerRadius
lightShadow.shadowOffset = CGSize(width: -shadowRadius, height: -shadowRadius)
lightShadow.shadowOpacity = 0.7
lightShadow.shadowRadius = shadowRadius
layer.insertSublayer(lightShadow, at: 0)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
}
Here is the simple fix for your issue provide the bounds instead of the frame as the frame for the CALayer, here's how:
darkShadow.frame = bounds
To understand how this works you need to know the basics of UIKit layout and the difference between frame and bounds (You might wanna google this). In simple words, frame is the coordinates of the view with respect to super and bounds is with respect to itself.
Note: (I'm adding this here just as a guideline) It's a common beginner mistake. There are plenty of online resources that explain the difference between frame and bounds. Although you might find it a bit overwhelming in the beginning you will get to know the difference eventually. Here are the ones I found useful and could be helpful for you as well :- Youtube Video of Saun Alen and Article from hacking with swift.
Related
In my scene I have 2 views: first holds CALayer instances (bars), another hold CAGradientLayer and placed over first one. Picture below describes current state.
But I need this gradient to be applied only to bars (CALayer) of the first view.
I haven't found any relevant information to my problem. Any help appreciated.
You have to apply a mask to the gradient. There are various ways you could approach this problem.
You could create a CAShapeLayer, set the shape layer's path to the shape of the bars, and set the gradient layer's mask to that shape layer.
Or you could get rid of the bar layer and instead use two gradient layers, one for the orange bars and the other for the gray bars. Put both gradient layers in a subview, side-by-side, and set the superview's layer mask to the shape layer. Here's how to do that.
You'll need two gradient layers and a shape layer:
#IBDesignable
class BarGraphView : UIView {
private let orangeGradientLayer = CAGradientLayer()
private let grayGradientLayer = CAGradientLayer()
private let maskLayer = CAShapeLayer()
You'll also need the bar width:
private let barWidth = CGFloat(9)
At initialization time, set up the gradients and add all the sublayers:
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
backgroundColor = .black
initGradientLayer(orangeGradientLayer, with: .orange)
initGradientLayer(grayGradientLayer, with: .gray)
maskLayer.strokeColor = nil
maskLayer.fillColor = UIColor.white.cgColor
layer.mask = maskLayer
}
private func initGradientLayer(_ gradientLayer: CAGradientLayer, with color: UIColor) {
gradientLayer.colors = [ color, color, color.withAlphaComponent(0.6), color ].map({ $0.cgColor })
gradientLayer.locations = [ 0.0, 0.5, 0.5, 1.0 ]
layer.addSublayer(gradientLayer)
}
At layout time, set the frames of the gradient layers and set the mask layer's path. This requires a little work because you don't want a bar to be half orange and half gray.
override func layoutSubviews() {
super.layoutSubviews()
let barCount = ceil(bounds.size.width / barWidth)
let orangeBarCount = floor(barCount / 2)
let grayBarCount = barCount - orangeBarCount
var grayFrame = bounds
grayFrame.size.width = grayBarCount * barWidth
grayFrame.origin.x = frame.maxX - grayFrame.size.width
grayGradientLayer.frame = grayFrame
var orangeFrame = bounds
orangeFrame.size.width -= grayFrame.size.width
orangeGradientLayer.frame = orangeFrame
maskLayer.frame = bounds
maskLayer.path = barPath()
}
private func barPath() -> CGPath {
var columnBounds = self.bounds
columnBounds.origin.x = columnBounds.maxX
columnBounds.size.width = barWidth
let path = CGMutablePath()
for datum in barData.reversed() {
columnBounds.origin.x -= barWidth
let barHeight = CGFloat(datum) * columnBounds.size.height
let barRect = columnBounds.insetBy(dx: 1, dy: (columnBounds.size.height - barHeight) / 2)
path.addRoundedRect(in: barRect, cornerWidth: 2, cornerHeight: 2)
}
return path
}
let barData: [Double] = {
let count = 100
return (0 ..< count).map({ 0.5 + (1 + sin(8.0 * .pi * Double($0) / Double(count))) / 4 })
}()
}
Result:
The BarGraphView is transparent wherever there are no bars. If you want it on a dark background, put a dark view behind it, or make it a subview of a dark view:
I am trying to create an ImageView that has rounded corners and a shadow to give it some depth. I was able to create a shadow for the UIImageView, but whenever I added the code to also make it have rounded corners, it only had rounded corners with no shadow. I have an IBOutlet named myImage, and it is inside of the viewDidLoad function. Does anybody have any ideas on how to make it work? What am I doing wrong?
override func viewDidLoad() {
super.ViewDidLoad()
myImage.layer.shadowColor = UIColor.black.cgColor
myImage.layer.shadowOpacity = 1
myImage.layer.shadowOffset = CGSize.zero
myImage.layer.shadowRadius = 10
myImage.layer.shadowPath = UIBezierPath(rect: myImage.bounds).cgPath
myImage.layer.shouldRasterize = false
myImage.layer.cornerRadius = 10
myImage.clipsToBounds = true
}
If you set clipsToBounds to true, this will round the corners but prevent the shadow from appearing. In order to resolve this, you can create two views. The container view should have the shadow, and its subview should have the rounded corners.
The container view has clipsToBounds set to false, and has the shadow properties applied. If you want the shadow to be rounded as well, use the UIBezierPath constructor that takes in a roundedRect and cornerRadius.
let outerView = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
outerView.clipsToBounds = false
outerView.layer.shadowColor = UIColor.black.cgColor
outerView.layer.shadowOpacity = 1
outerView.layer.shadowOffset = CGSize.zero
outerView.layer.shadowRadius = 10
outerView.layer.shadowPath = UIBezierPath(roundedRect: outerView.bounds, cornerRadius: 10).cgPath
Next, set the image view (or any other type of UIView) to be the same size of the container view, set clipsToBounds to true, and give it a cornerRadius.
let myImage = UIImageView(frame: outerView.bounds)
myImage.clipsToBounds = true
myImage.layer.cornerRadius = 10
Finally, remember to make the image view a subview of the container view.
outerView.addSubview(myImage)
The result should look something like this:
Swift 5:
You can use the below extension:
extension UIImageView {
func applyshadowWithCorner(containerView : UIView, cornerRadious : CGFloat){
containerView.clipsToBounds = false
containerView.layer.shadowColor = UIColor.black.cgColor
containerView.layer.shadowOpacity = 1
containerView.layer.shadowOffset = CGSize.zero
containerView.layer.shadowRadius = 10
containerView.layer.cornerRadius = cornerRadious
containerView.layer.shadowPath = UIBezierPath(roundedRect: containerView.bounds, cornerRadius: cornerRadious).cgPath
self.clipsToBounds = true
self.layer.cornerRadius = cornerRadious
}
}
How to use:
Drag a UIView on the storyboard
Drag an ImageView inside that UIView
Storyboard should look like this:
Create IBOutlet for both Views, call extension on your ImageView, and pass above created UIView as an argument.
Here is the output :
Finally here is how to
Properly have an image view, with rounded corners AND shadows.
It's this simple:
First some bringup code ..
class ShadowRoundedImageView: UIView {
override init(frame: CGRect) {
super.init(frame: frame); common() }
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder); common() }
private func common() {
backgroundColor = .clear
clipsToBounds = false
self.layer.addSublayer(shadowLayer)
self.layer.addSublayer(imageLayer) // (in that order)
}
#IBInspectable var image: UIImage? = nil {
didSet {
imageLayer.contents = image?.cgImage
shadowLayer.shadowPath = (image == nil) ? nil : shapeAsPath
}
}
and then the layers ...
var imageLayer: CALayer = CALayer()
var shadowLayer: CALayer = CALayer()
var shape: UIBezierPath {
return UIBezierPath(roundedRect: bounds, cornerRadius:50)
}
var shapeAsPath: CGPath {
return shape.cgPath
}
var shapeAsMask: CAShapeLayer {
let s = CAShapeLayer()
s.path = shapeAsPath
return s
}
override func layoutSubviews() {
super.layoutSubviews()
imageLayer.frame = bounds
imageLayer.contentsGravity = .resizeAspectFill // (as preferred)
imageLayer.mask = shapeAsMask
shadowLayer.shadowPath = (image == nil) ? nil : shapeAsPath
shadowLayer.shadowOpacity = 0.80 // etc ...
}
}
Here is the
Explanation
UIImageView is useless, you use a UIView
You need two layers, one for the shadow and one for the image
To round an image layer you use a mask
To round a shadow layer you use a path
For the shadow qualities, obviously add code as you see fit
shadowLayer.shadowOffset = CGSize(width: 0, height: 20)
shadowLayer.shadowColor = UIColor.purple.cgColor
shadowLayer.shadowRadius = 5
shadowLayer.shadowOpacity = 0.80
For the actual shape (the bez path) make it any shape you wish.
(For example this tip https://stackoverflow.com/a/41553784/294884 shows how to make only one or two corners rounded.)
Summary:
• Use two layers on a UIView
Make your bezier and ...
• Use a mask on the image layer
• Use a path on the shadow layer
Here is a another solution (tested code) in swift 2.0
If you set clipsToBounds to true, this will round the corners but prevent the shadow from appearing. So, you can add same size UIView in storyboard behind imageview and we can give shadow to that view
SWIFT 2.0
outerView.layer.cornerRadius = 20.0
outerView.layer.shadowColor = UIColor.blackColor().CGColor
outerView.layer.shadowOffset = CGSizeMake(0, 2)
outerView.layer.shadowOpacity = 1
outerView.backgroundColor = UIColor.whiteColor()
You can use a simple class I have created to add image with rounded corners and shadow directly from Storyboard
You can find the class here
I have created a UIProgressView with following properties
progressView.progressTintColor = UIColor.appChallengeColorWithAlpha(1.0)
progressView.trackTintColor = UIColor.clearColor()
progressView.clipsToBounds = true
progressView.layer.cornerRadius = 5
I am using a UIView for border. It appears like his progress = 1, which is exactly the way I want.
But if progress value is less then 1. Corners are not rounded as it should be.
Am I missing something ? How can I make it rounded corner ?
UIProgressView has two part, progress part and track part. If you use Reveal, you can see it only has two subviews. The progress view hierarchy is very simple. so...
Objective-C
- (void)layoutSubviews
{
[super layoutSubviews];
[self.progressView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
obj.layer.masksToBounds = YES;
obj.layer.cornerRadius = kProgressViewHeight / 2.0;
}];
}
Swift (3, 4 and 5+)
override func layoutSubviews() {
super.layoutSubviews()
subviews.forEach { subview in
subview.layer.masksToBounds = true
subview.layer.cornerRadius = kProgressViewHeight / 2.0
}
}
I admit subclass or extend progressView is the recommended way. In case of you don't want to do that for such a simple effect, this may do the trick.
Keep the situation that Apple will change the view hierarchy, and something may go wrong in mind.
Just do this in init
layer.cornerRadius = *desired_corner_radius*
clipsToBounds = true
It's very late to answer but actually I had the same problem.
Here my simplest solution (no code needed !) :
Add a container to embed your progress view
Round corner for your container (10 = height of container / 2)
The result :)
After searching and trying I decided to create my own custom progress view. Here is the code for anyone who may find them selevs in same problem.
import Foundation
import UIKit
class CustomHorizontalProgressView: UIView {
var progress: CGFloat = 0.0 {
didSet {
setProgress()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
func setup() {
self.backgroundColor = UIColor.clearColor()
}
override func drawRect(rect: CGRect) {
super.drawRect(rect)
setProgress()
}
func setProgress() {
var progress = self.progress
progress = progress > 1.0 ? progress / 100 : progress
self.layer.cornerRadius = CGRectGetHeight(self.frame) / 2.0
self.layer.borderColor = UIColor.grayColor().CGColor
self.layer.borderWidth = 1.0
let margin: CGFloat = 6.0
var width = (CGRectGetWidth(self.frame) - margin) * progress
let height = CGRectGetHeight(self.frame) - margin
if (width < height) {
width = height
}
let pathRef = UIBezierPath(roundedRect: CGRect(x: margin / 2.0, y: margin / 2.0, width: width, height: height), cornerRadius: height / 2.0)
UIColor.redColor().setFill()
pathRef.fill()
UIColor.clearColor().setStroke()
pathRef.stroke()
pathRef.closePath()
self.setNeedsDisplay()
}
}
Just put above code in a swift file and drag drop a UIView in IB and give it class CustomHorizontalProgressView. and That is it.
Another answer to throw in the mix, super hacky but very quick to use.
You can just grab the sublayer and set its radius. No need to write your own UIProgressView or mess with clip paths.
progressView.layer.cornerRadius = 5
progressView.layer.sublayers[1].cornerRadius = 5
progressView.subviews[1]. clipsToBounds = true
progressView.layer.masksToBounds = true
So you round the corner of your overall UIProgressView (no need for ClipsToBounds)
Then the fill bar is the 2nd sublayer, so you can grab that and round its Corners, but you also need to set the subview for that layer to clipsToBounds.
Then set the overall layer to mask to its bounds and it all looks good.
Obviously, this is massively reliant on the setup of UIProgressView not changing and the 2nd subview/layer being the fill view.
But. If you're happy with that assumption, super easy code wise to use.
Basically progress view's (Default Style) subviews consist of 2 image view.
One for the "progress", and one for the "track".
You can loop the subviews of progress view, and set the each of image view's corner radius.
for let view: UIView in self.progressView.subviews {
if view is UIImageView {
view.clipsToBounds = true
view.layer.cornerRadius = 15
}
}
Yes ,one thing is missed...corner radius is set to progressview and it is reflecting as expected..
But if you want your track image to be rounded you have to customise your progressview.
You have to use image with rounded corner.
[progressView setTrackImage:[UIImage imageNamed:#"roundedTrack.png"]];
//roundedTrack.png must be of rounded corner
This above code will help you to change image of trackView for your progressview.
You may face the inappropriate stretching of image. You have to make your image resizable.
May be the link below will be useful if issue arise
https://www.natashatherobot.com/ios-stretchable-button-uiedgeinsetsmake/
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let v = ProgessView(frame: CGRect(x: 20, y: 200, width: 100, height: 10))
view.addSubview(v)
//v.progressLayer.strokeEnd = 0.8
}
}
class ProgessView: UIView {
lazy var progressLayer: CAShapeLayer = {
let line = CAShapeLayer()
let path = UIBezierPath()
path.move(to: CGPoint(x: 5, y: 5))
path.addLine(to: CGPoint(x: self.bounds.width - 5, y: 5))
line.path = path.cgPath
line.lineWidth = 6
line.strokeColor = UIColor(colorLiteralRed: 127/255, green: 75/255, blue: 247/255, alpha: 1).cgColor
line.strokeStart = 0
line.strokeEnd = 0.5
line.lineCap = kCALineCapRound
line.frame = self.bounds
return line
}()
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = UIColor.white
layer.cornerRadius = 5
layer.borderWidth = 1
layer.borderColor = UIColor(colorLiteralRed: 197/255, green: 197/255, blue: 197/255, alpha: 1).cgColor
layer.addSublayer(progressLayer)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Test my codes. You can design the height and the width as your want. You can use strokeEnd to change the progress of the progressView. You can add an animation to it. But actually, it is already animatable, you can change the value of the strokeEnd to see its primary effect. If you want to design your own animation. Try CATransaction like below.
func updateProgress(_ progress: CGFloat) {
CATransaction.begin()
CATransaction.setAnimationDuration(3)
progressLayer.strokeEnd = progress
CATransaction.commit()
}
I had this exact same problem, which is what led me to your question after googling like crazy. The problem is two-fold. First, how to make the inside of the progress bar round at the end (which 季亨达's answer shows how to do), and secondly, how to make the round end of the CAShapeLayer you added match up with the square end of the original progress bar underneath (the answer to this other StackOverflow question helped with that How to get the exact point of objects in swift?) If you replace this line of code in 季亨达's answer:
path.addLine(to: CGPoint(x: self.bounds.width - 5, y: 5))
with this:
path.addLine(to: CGPoint(x: (Int(self.progress * Float(self.bounds.width))), y: 5))
you will hopefully get the result you're looking for.
With swift 4.0 I'm doing in this way:
let progressViewHeight: CGFloat = 4.0
// Set progress view height
let transformScale = CGAffineTransform(scaleX: 1.0, y: progressViewHeight)
self.progressView.transform = transformScale
// Set progress round corners
self.progressView.layer.cornerRadius = progressViewHeight
self.progressView.clipsToBounds = true
//Updated for swift 4
import Foundation
import UIKit
class CustomHorizontalProgressView: UIView {
var progress: CGFloat = 0.0 {
didSet {
setProgress()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
func setup() {
self.backgroundColor = UIColor.clear
}
override func draw(_ rect: CGRect) {
super.draw(rect)
setProgress()
}
func setProgress() {
var progress = self.progress
progress = progress > 1.0 ? progress / 100 : progress
self.layer.cornerRadius = self.frame.height / 2.0
self.layer.borderColor = UIColor.gray.cgColor
self.layer.borderWidth = 1.0
let margin: CGFloat = 6.0
var width = (self.frame.width - margin) * progress
let height = self.frame.height - margin
if (width < height) {
width = height
}
let pathRef = UIBezierPath(roundedRect: CGRect(x: margin / 2.0, y: margin / 2.0, width: width, height: height), cornerRadius: height / 2.0)
UIColor.red.setFill()
pathRef.fill()
UIColor.clear.setStroke()
pathRef.stroke()
pathRef.close()
self.setNeedsDisplay()
}
}
Swift 4.2 version from Umair Afzal's solution
class CustomHorizontalProgressView: UIView {
var strokeColor: UIColor?
var progress: CGFloat = 0.0 {
didSet {
setNeedsDisplay()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
func setup() {
self.backgroundColor = UIColor.clear
}
override func draw(_ rect: CGRect) {
super.draw(rect)
setProgress()
}
func setProgress() {
var progress = self.progress
progress = progress > 1.0 ? progress / 100 : progress
self.layer.cornerRadius = frame.size.height / 2.0
self.layer.borderColor = UIColor.gray.cgColor
self.layer.borderWidth = 1.0
let margin: CGFloat = 6.0
var width = (frame.size.width - margin) * progress
let height = frame.size.height - margin
if (width < height) {
width = height
}
let pathRef = UIBezierPath(roundedRect: CGRect(x: margin / 2.0, y: margin / 2.0, width: width, height: height), cornerRadius: height / 2.0)
strokeColor?.setFill()
pathRef.fill()
UIColor.clear.setStroke()
pathRef.stroke()
pathRef.close()
}
}
And to use it
var progressView: CustomHorizontalProgressView = {
let view = CustomHorizontalProgressView()
view.strokeColor = UIColor.orange
view.progress = 0.5
return view
}()
Set line cap :
.lineCap = kCALineCapRound;
I am masking an image within a stack view and for some odd reason, my mask is not aligning/resizing correctly with the image.
Here is a demonstration of what's occurring as I'm dynamically adding instances of this image in a stack view while each subview is resized within its boundaries and spacing.
As you can see, the mask retains the original size of the image and not the resized version. I've tried many different width & height variations including the bounds.width, layer.frame.width, frame.width, frame.origin.x, etc, and had no luck.
Current code in Swift 2:
let testPicture:UIImageView = UIImageView(image: UIImage(named: "myPicture"))
testPicture.contentMode = .ScaleAspectFit
testPicture.layer.borderWidth = 1
testPicture.clipsToBounds = true
testPicture.layer.masksToBounds = true
view.layer.addSublayer(shapeLayer)
var width = testPicture.layer.frame.width
var height = testPicture.layer.frame.height
let center = CGPointMake(width/2, height/2)
let radius = CGFloat(CGFloat(width) / 2)
// Mask
let yourCarefullyDrawnPath = UIBezierPath()
yourCarefullyDrawnPath.moveToPoint(center)
yourCarefullyDrawnPath.addArcWithCenter(center,
radius: radius,
startAngle: 0,
endAngle: CGFloat( (0.80*360.0) * M_PI / 180.0),
clockwise: true)
yourCarefullyDrawnPath.closePath()
let maskPie = CAShapeLayer()
maskPie.frame = testPicture.layer.bounds
testPicture.clipsToBounds = true
testPicture.layer.masksToBounds = true
maskPie.path = yourCarefullyDrawnPath.CGPath
testPicture.layer.mask = maskPie
// Add Into Stackview
self.myStackView.addArrangedSubview(testPicture)
self.myStackView.layoutIfNeeded()
I suspect that I'm fetching the wrong width and height in order to generate the center and radius variables although after trying all the different widths and heights I can find, I still cannot achieve the correct sizes. :-(
You'll want to get the frame the image occupies within the image view.
Unfortunately, UIImageView provides no native support for doing this, however you can calculate this fairly simply. I have already created a function that will take a given outer rect, and a given inner rect and return the inner rect after it's been aspect fitted to sit within the outer rect.
A Swift version of the function would look something like this:
func aspectFitRect(outerRect outerRect:CGRect, innerRect:CGRect) -> CGRect {
let innerRectRatio = innerRect.size.width/innerRect.size.height; // inner rect ratio
let outerRectRatio = outerRect.size.width/outerRect.size.height; // outer rect ratio
// calculate scaling ratio based on the width:height ratio of the rects.
let ratio = (innerRectRatio > outerRectRatio) ? outerRect.size.width/innerRect.size.width:outerRect.size.height/innerRect.size.height;
// The x-offset of the inner rect as it gets centered
let xOffset = (outerRect.size.width-(innerRect.size.width*ratio))*0.5;
// The y-offset of the inner rect as it gets centered
let yOffset = (outerRect.size.height-(innerRect.size.height*ratio))*0.5;
// aspect fitted origin and size
let innerRectOrigin = CGPoint(x: xOffset+outerRect.origin.x, y: yOffset+outerRect.origin.y);
let innerRectSize = CGSize(width: innerRect.size.width*ratio, height: innerRect.size.height*ratio);
return CGRect(origin: innerRectOrigin, size: innerRectSize);
}
The other thing you need to do is subclass UIImageView and override the layoutSubviews method. This is because as you're adding your image views to a UIStackView - you're no longer in control of the frames of your image views. Therefore by overriding layoutSubviews, you'll be able to update your mask whenever the stack view alters the frame of the view.
Something like this should achieve the desired result:
class MaskedImageView: UIImageView {
let maskLayer = CAShapeLayer()
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
override init(image: UIImage?) {
super.init(image: image)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
// configure your common image view properties here
contentMode = .ScaleAspectFit
clipsToBounds = true
// mask your image layer
layer.mask = maskLayer
}
override func layoutSubviews() {
guard let img = image else { // if there's no image - skip updating the mask.
return
}
// the frame that the image itself will occupy in the image view as it gets aspect fitted
let imageRect = aspectFitRect(outerRect: bounds, innerRect: CGRect(origin: CGPointZero, size: img.size))
// update mask frame
maskLayer.frame = imageRect
// half the image's on-screen width or height, whichever is smallest
let radius = min(imageRect.size.width, imageRect.size.height)*0.5
// the center of the image rect
let center = CGPoint(x: imageRect.size.width*0.5, y: imageRect.size.height*0.5)
// your custom masking path
let path = UIBezierPath()
path.moveToPoint(center)
path.addArcWithCenter(center, radius: radius, startAngle: 0, endAngle: CGFloat(M_PI*2.0*0.8), clockwise: true)
path.closePath()
// update mask layer path
maskLayer.path = path.CGPath
}
}
You can then create your image views from your view controller and add them to your stack view as normal.
let stackView = UIStackView()
override func viewDidLoad() {
super.viewDidLoad()
stackView.frame = view.bounds
stackView.distribution = .FillProportionally
stackView.spacing = 10
view.addSubview(stackView)
for _ in 0..<5 {
let imageView = MaskedImageView(image:UIImage(named:"foo.jpg"))
stackView.addArrangedSubview(imageView)
stackView.layoutIfNeeded()
}
}
Gives me the following result:
Unrelated Ramblings...
Just noticed in your code that you're doing this:
testPicture.clipsToBounds = true
testPicture.layer.masksToBounds = true
These both do the same thing.
A UIView is no more than a wrapper for an underlying CALayer. However for convenience, some CALayer properties also have a UIView equivalent. All the UIView equivalent does is forward to message down to the CALayer when it is set, and retrieve a value from the CALayer when it is 'get'ed.
clipsToBounds and masksToBounds are one of these pairs (although annoyingly they don't share the same name).
Try doing the following:
view.layer.masksToBounds = true
print(view.clipsToBounds) // output: true
view.layer.masksToBounds = false
print(view.clipsToBounds) // output: false
view.clipsToBounds = true
print(view.layer.masksToBounds) // output: true
view.clipsToBounds = false
print(view.layer.masksToBounds) // output: false
Seeing as you're working with a UIView, clipToBounds is generally the preferred property to update.
I am trying to create an ImageView that has rounded corners and a shadow to give it some depth. I was able to create a shadow for the UIImageView, but whenever I added the code to also make it have rounded corners, it only had rounded corners with no shadow. I have an IBOutlet named myImage, and it is inside of the viewDidLoad function. Does anybody have any ideas on how to make it work? What am I doing wrong?
override func viewDidLoad() {
super.ViewDidLoad()
myImage.layer.shadowColor = UIColor.black.cgColor
myImage.layer.shadowOpacity = 1
myImage.layer.shadowOffset = CGSize.zero
myImage.layer.shadowRadius = 10
myImage.layer.shadowPath = UIBezierPath(rect: myImage.bounds).cgPath
myImage.layer.shouldRasterize = false
myImage.layer.cornerRadius = 10
myImage.clipsToBounds = true
}
If you set clipsToBounds to true, this will round the corners but prevent the shadow from appearing. In order to resolve this, you can create two views. The container view should have the shadow, and its subview should have the rounded corners.
The container view has clipsToBounds set to false, and has the shadow properties applied. If you want the shadow to be rounded as well, use the UIBezierPath constructor that takes in a roundedRect and cornerRadius.
let outerView = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
outerView.clipsToBounds = false
outerView.layer.shadowColor = UIColor.black.cgColor
outerView.layer.shadowOpacity = 1
outerView.layer.shadowOffset = CGSize.zero
outerView.layer.shadowRadius = 10
outerView.layer.shadowPath = UIBezierPath(roundedRect: outerView.bounds, cornerRadius: 10).cgPath
Next, set the image view (or any other type of UIView) to be the same size of the container view, set clipsToBounds to true, and give it a cornerRadius.
let myImage = UIImageView(frame: outerView.bounds)
myImage.clipsToBounds = true
myImage.layer.cornerRadius = 10
Finally, remember to make the image view a subview of the container view.
outerView.addSubview(myImage)
The result should look something like this:
Swift 5:
You can use the below extension:
extension UIImageView {
func applyshadowWithCorner(containerView : UIView, cornerRadious : CGFloat){
containerView.clipsToBounds = false
containerView.layer.shadowColor = UIColor.black.cgColor
containerView.layer.shadowOpacity = 1
containerView.layer.shadowOffset = CGSize.zero
containerView.layer.shadowRadius = 10
containerView.layer.cornerRadius = cornerRadious
containerView.layer.shadowPath = UIBezierPath(roundedRect: containerView.bounds, cornerRadius: cornerRadious).cgPath
self.clipsToBounds = true
self.layer.cornerRadius = cornerRadious
}
}
How to use:
Drag a UIView on the storyboard
Drag an ImageView inside that UIView
Storyboard should look like this:
Create IBOutlet for both Views, call extension on your ImageView, and pass above created UIView as an argument.
Here is the output :
Finally here is how to
Properly have an image view, with rounded corners AND shadows.
It's this simple:
First some bringup code ..
class ShadowRoundedImageView: UIView {
override init(frame: CGRect) {
super.init(frame: frame); common() }
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder); common() }
private func common() {
backgroundColor = .clear
clipsToBounds = false
self.layer.addSublayer(shadowLayer)
self.layer.addSublayer(imageLayer) // (in that order)
}
#IBInspectable var image: UIImage? = nil {
didSet {
imageLayer.contents = image?.cgImage
shadowLayer.shadowPath = (image == nil) ? nil : shapeAsPath
}
}
and then the layers ...
var imageLayer: CALayer = CALayer()
var shadowLayer: CALayer = CALayer()
var shape: UIBezierPath {
return UIBezierPath(roundedRect: bounds, cornerRadius:50)
}
var shapeAsPath: CGPath {
return shape.cgPath
}
var shapeAsMask: CAShapeLayer {
let s = CAShapeLayer()
s.path = shapeAsPath
return s
}
override func layoutSubviews() {
super.layoutSubviews()
imageLayer.frame = bounds
imageLayer.contentsGravity = .resizeAspectFill // (as preferred)
imageLayer.mask = shapeAsMask
shadowLayer.shadowPath = (image == nil) ? nil : shapeAsPath
shadowLayer.shadowOpacity = 0.80 // etc ...
}
}
Here is the
Explanation
UIImageView is useless, you use a UIView
You need two layers, one for the shadow and one for the image
To round an image layer you use a mask
To round a shadow layer you use a path
For the shadow qualities, obviously add code as you see fit
shadowLayer.shadowOffset = CGSize(width: 0, height: 20)
shadowLayer.shadowColor = UIColor.purple.cgColor
shadowLayer.shadowRadius = 5
shadowLayer.shadowOpacity = 0.80
For the actual shape (the bez path) make it any shape you wish.
(For example this tip https://stackoverflow.com/a/41553784/294884 shows how to make only one or two corners rounded.)
Summary:
• Use two layers on a UIView
Make your bezier and ...
• Use a mask on the image layer
• Use a path on the shadow layer
Here is a another solution (tested code) in swift 2.0
If you set clipsToBounds to true, this will round the corners but prevent the shadow from appearing. So, you can add same size UIView in storyboard behind imageview and we can give shadow to that view
SWIFT 2.0
outerView.layer.cornerRadius = 20.0
outerView.layer.shadowColor = UIColor.blackColor().CGColor
outerView.layer.shadowOffset = CGSizeMake(0, 2)
outerView.layer.shadowOpacity = 1
outerView.backgroundColor = UIColor.whiteColor()
You can use a simple class I have created to add image with rounded corners and shadow directly from Storyboard
You can find the class here