I'm trying to create a border around a mask using a UIimage. When I create the mask in code it looks fine:
#IBOutlet weak var imageToBeMasked: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
let mask = UIImageView(image: Image)
imageToBeMasked.mask = mask
}
But when I try and create a stroke around it appears to not use the mask at all:
#IBOutlet weak var imageToBeMasked: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
let mask = UIImageView(image: Image)
// the layer used to mask the image view
let maskLayer = CAShapeLayer()
maskLayer.path = UIBezierPath(rect: mask.bounds).cgPath
imageToBeMasked.layer.mask = maskLayer
// the layer used to draw the border
let strokeLayer = CAShapeLayer()
strokeLayer.frame = imageToBeMasked.bounds
strokeLayer.fillColor = UIColor.clear.cgColor
strokeLayer.path = UIBezierPath(rect: mask.bounds).cgPath
strokeLayer.strokeColor = UIColor.black.cgColor
strokeLayer.lineWidth = 4
imageToBeMasked.layer.addSublayer(strokeLayer)
}
Any clue on how to solve this issue?
The CALayer is not affected by the mask itself. The quickest way would be creating a new image which is slightly bigger than the original, place it behind the original image and tint it with a color.
let templateImage = originalImage.withRenderingMode(.alwaysTemplate)
strokeImageView.image = templateImage
strokeImageView.tintColor = .black
Related
The width(40) and height(40) of the UIView are equal.
I have tried these but they didn't work for me:
countView?.clipsToBounds = true
self.countView?.layer.cornerRadius = min((countView?.frame.size.width)!, (countView?.frame.size.height)!)/2
and also
self.countView.layer.cornerRadius = (countView.frame.size.width)/2
Thanks
In addition to #Stephan answer.
With less code:
self.countView.layer.cornerRadius = self.countView.bounds.height / 2
Result:
You can use a mask layer like this:
override func viewDidLoad() {
super.viewDidLoad()
let maskLayer = CAShapeLayer()
maskLayer.path = UIBezierPath(ovalIn: self.countView.bounds).cgPath;
self.countView.layer.mask = maskLayer
}
Example Output
Here the output of a UIView with width/height = 128/128:
I'm calling a function that sets up a UIImageView:
func setupImageView(_ imageView: UIImageView) {}
I want to give that UIImageView an image, round its corners, and give it two different borders.
Here is what I am currently doing:
imageView.image = imageConstants.imageThatIsWanted
imageView.clipsToBounds = true
imageView.layer.cornerRadius = imageView.frame.height / 2
imageView.layer.borderWidth = 3.0
imageView.layer.borderColor = UIColor.white.cgColor
What is the best way to apply a second borderColor of color blue around the white border?
I tried creating a sublayer as a CALayer and giving it a blue border, but this goes behind the image, and also inside of the white border. I also tried drawing a UIBezierPath, but that stays inside of the white border as well.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var secondView: UIView!
#IBOutlet weak var imgView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imgView.layer.cornerRadius = imgView.frame.size.height/2
secondView.layer.cornerRadius = secondView.frame.size.height/2
imgView.layer.borderWidth = 5.0
imgView.layer.borderColor = UIColor.red.cgColor
imgView.clipsToBounds = true
secondView.clipsToBounds = true
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
You can add UIlabel or UIImageview at back of your image view having size little bit larger than your image view and applying corner radius, if you want to reduce line of your code (Please check below code)
imgview.layer.masksToBounds = true
imgview.layer.cornerRadius = imgview.frame.size.width/2
imgview.layer.borderWidth = 5
imgview.layer.borderColor = UIColor.white.cgColor
Add new image view programatically at back side of image view already taken
let img = UIImageView(frame: CGRect(x: imgview.frame.origin.x - 2, y: imgview.frame.origin.y - 2, width: imgview.frame.size.width + 4, height: imgview.frame.size.height + 4))
img.layer.masksToBounds = true
img.layer.cornerRadius = img.frame.size.width/2
//img.backgroundColor = UIColor.blue // You can also use background color instead of border
img.layer.borderWidth = 5
img.layer.borderColor = UIColor.blue.cgColor
self.view.addSubview(img)
self.view.sendSubview(toBack: img)
I know its not proper solution but we can use this to reduce lines of code
Hope it will helps you
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 a blue view with a white dashed border. As you can see from the image below, once the app is rotated the view changes its dimensions and the border doesn't adjust to the view's new width and height.
I need to find a way to
Know when the view controller changes its size - perhaps using viewWillTransitionToSize.
Delete the previously drawn border, if any.
Add a new border to the view - in the view's drawRect method.
How can I delete the border previously drawn on the view?
#IBOutlet weak var myView: UIView!
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
coordinator.animateAlongsideTransition(nil, completion: {
_ in
self.myView.setNeedsDisplay()
})
}
class RenderView: UIView {
override func drawRect(rect: CGRect) {
self.addDashedBorder()
}
}
extension UIView {
func addDashedBorder() {
let color = UIColor.whiteColor().CGColor
let shapeLayer:CAShapeLayer = CAShapeLayer()
let frameSize = self.frame.size
let shapeRect = CGRect(x: 0, y: 0, width: frameSize.width, height: frameSize.height)
shapeLayer.bounds = shapeRect
shapeLayer.position = CGPoint(x: frameSize.width/2, y: frameSize.height/2)
shapeLayer.fillColor = UIColor.clearColor().CGColor
shapeLayer.strokeColor = color
shapeLayer.lineWidth = 6
shapeLayer.lineJoin = kCALineJoinRound
shapeLayer.lineDashPattern = [6,3]
shapeLayer.path = UIBezierPath(roundedRect: shapeRect, cornerRadius: 5).CGPath
self.layer.addSublayer(shapeLayer)
}
}
Download sample project here.
This is not the right way to do things. Each time your RenderView is redrawn, its drawRect method will be called, and addDashedBorder will add a new layer to your view.
drawRect is for drawing inside of your view using CoreGraphics or UIKit, not CoreAnimation. Inside that method, you should just draw, nothing else. If you want to use it a layer, layoutSubviews is a better place to add it, and to update it to match the view.
Here are two ways to solve your problem. Both update the border correctly, and animate the border smoothly when the device is rotated.
Alternative 1: Just draw the border in drawRect, rather than using a separate shape layer. Also, set your view's contentMode so it automatically redraws when its size changes.
class ViewController: UIViewController {
#IBOutlet weak var myView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
self.myView.contentMode = .Redraw
}
}
class RenderView: UIView {
override func drawRect(rect: CGRect) {
let path = UIBezierPath(roundedRect: self.bounds, cornerRadius: 5)
path.lineWidth = 6
let pattern: [CGFloat] = [6.0, 3.0]
path.setLineDash(pattern, count: 2, phase: 0)
UIColor.whiteColor().setStroke()
path.stroke()
}
}
Alternative 2: Continue to use CAShapeLayer, but only create a single one, by using a lazy stored property. Update the layer in an override of layoutSubviews, and if necessary, animate it alongside any changes in the view's bounds.
class ViewController: UIViewController {
#IBOutlet weak var myView: UIView!
}
class RenderView: UIView {
// Create the borderLayer, and add it to our view's layer, on demand, only once.
lazy var borderLayer: CAShapeLayer = {
let shapeLayer = CAShapeLayer()
shapeLayer.fillColor = nil
shapeLayer.strokeColor = UIColor.whiteColor().CGColor
shapeLayer.lineWidth = 6
shapeLayer.lineDashPattern = [6,3]
self.layer.addSublayer(shapeLayer)
return shapeLayer
}()
override func layoutSubviews() {
super.layoutSubviews()
// We will update the borderLayer's path to match the view's current bounds.
let newPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: 5).CGPath
// We may be animating from the old bounds to the new bounds.
// If so, we want the borderLayer to animate alongside that.
// (UIView does not do this automatically, since it does not know
// anything about our borderLayer; it's at the the CoreAnimation level,
// below UIKit.)
//
// We want an animation that uses the same properties as the existing
// animation, but applies to a different value: the borderLayer's path.
// We'll find the existing animation on the view's bounds.size,
// and if it exists, add our own animation based on it that will
// apply the path change.
if let viewBoundsAnimation = self.layer.animationForKey("bounds.size") {
let pathAnimation = CABasicAnimation()
pathAnimation.beginTime = viewBoundsAnimation.beginTime
pathAnimation.duration = viewBoundsAnimation.duration
pathAnimation.speed = viewBoundsAnimation.speed
pathAnimation.timeOffset = viewBoundsAnimation.timeOffset
pathAnimation.timingFunction = viewBoundsAnimation.timingFunction
pathAnimation.keyPath = "path"
pathAnimation.fromValue = borderLayer.path
pathAnimation.toValue = newPath
borderLayer.addAnimation(pathAnimation, forKey: "path")
}
// Finally, whether we are animating or not, make the border layer show the new path.
// If we are animating, this will appear when the animation is finished.
// If we are not animating, this will appear immediately.
self.borderLayer.path = newPath
}
}
Note that neither of these alternatives require overriding viewWillTransitionToSize or traitCollectionDidChange. Those are higher-level UIViewController concepts, that may get called during device rotation, but won't happen if some other code changes your view's size. It's better to use the simple UIView-level drawRect or layoutSubviews methods, because they will always work.
Call set needs display when the view transitions.You can detect it by using this function.It works perfectly to detect orientation change
override func traitCollectionDidChange(previousTraitCollection: UITraitCollection?) {
self.myView.setNeedsDisplay()
}
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