How to set corner radius of imageView?
IosSwiftUiimageviewCornerradiusIos Problem Overview
In Objective-C such line
self.mainImageView.layer.cornerRadius = CGRectGetWidth(self.mainImageView.frame)/4.0f;
does its job, I tried it in Swift using analogy
self.mainImageView.layer.cornerRadius = CGRectGetWidth(self.mainImageView.frame)/4.0
and it doesn't change anything, the corners are the same as before. Moreover, Xcode does not show any syntax errors. Does Swift support any other way to reach this goal? I checked some other threads here and usually it's getting done in Swift in the way showed above.
Ios Solutions
Solution 1 - Ios
Layer draws out of clip region, you need to set it to mask to bounds:
self.mainImageView.layer.masksToBounds = true
From the docs:
> By default, the corner radius does not apply to the image in the > layer’s contents property; it applies only to the background color and > border of the layer. However, setting the masksToBounds property to > true causes the content to be clipped to the rounded corners
Solution 2 - Ios
There is one tiny difference in Swift 3.0 and Xcode8
Whenever you want to apply corner radius to UIView, make sure you call
yourUIView.layoutIfNeeded()
before calling cornerRadius
.
Otherwise, it will return the default value for UIView's height and width (1000.0) which will probably make your View disappear.
Always make sure that all effects that changes the size of UIView (Interface builder constraints etc) are applied before setting any layer properties.
Example of UIView class implementation
class BadgeView: UIView {
override func awakeFromNib() {
self.layoutIfNeeded()
layer.cornerRadius = self.frame.height / 2.0
layer.masksToBounds = true
}
}
Solution 3 - Ios
You can define border radius of any view providing an "User defined Runtime Attributes", providing key path "layer.cornerRadius" of type string and then the value of radius you need ;) See attached images below:
Solution 4 - Ios
try this
self.mainImageView.layer.cornerRadius = CGRectGetWidth(self.mainImageView.frame)/4.0
self.mainImageView.clipsToBounds = true
Solution 5 - Ios
Marked with @IBInspectable
in swift (or IBInspectable in Objective-C), they are easily editable in Interface Builder’s attributes inspector panel.
You can directly set borderWidth,cornerRadius,borderColor in attributes inspector
extension UIView {
@IBInspectable var cornerRadius: CGFloat {
get{
return layer.cornerRadius
}
set {
layer.cornerRadius = newValue
layer.masksToBounds = newValue > 0
}
}
@IBInspectable var borderWidth: CGFloat {
get {
return layer.borderWidth
}
set {
layer.borderWidth = newValue
}
}
@IBInspectable var borderColor: UIColor? {
get {
return UIColor(cgColor: layer.borderColor!)
}
set {
layer.borderColor = borderColor?.cgColor
}
}
}
Solution 6 - Ios
in swift 3 'CGRectGetWidth' has been replaced by property 'CGRect.width'
view.layer.cornerRadius = view.frame.width/4.0
view.clipsToBounds = true
Solution 7 - Ios
Swift 3, Xcode 8, iOS 10
DispatchQueue.main.async {
self.mainImageView.layer.cornerRadius = self.mainImageView.bounds.size.width / 2.0
self.mainImageView.clipsToBounds = true
}
Solution 8 - Ios
The easiest way is to create an UIImageView subclass (I have tried it and it's working perfectly on iPhone 7 and XCode 8):
class CIRoundedImageView: UIImageView {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func awakeFromNib() {
self.layoutIfNeeded()
layer.cornerRadius = self.frame.height / 2.0
layer.masksToBounds = true
}
}
and then you can also set a border:
imageView.layer.borderWidth = 2.0
imageView.layer.borderColor = UIColor.blackColor().CGColor
Solution 9 - Ios
I created an UIView
extension which allows to round specific corners :
import UIKit
enum RoundType {
case top
case none
case bottom
case both
}
extension UIView {
func round(with type: RoundType, radius: CGFloat = 3.0) {
var corners: UIRectCorner
switch type {
case .top:
corners = [.topLeft, .topRight]
case .none:
corners = []
case .bottom:
corners = [.bottomLeft, .bottomRight]
case .both:
corners = [.allCorners]
}
DispatchQueue.main.async {
let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask
}
}
}
Solution 10 - Ios
import UIKit
class BorderImage: UIImageView {
override func awakeFromNib() {
self.layoutIfNeeded()
layer.cornerRadius = self.frame.height / 10.0
layer.masksToBounds = true
}
}
Based on @DCDC's answer