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.
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
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
}
}
try this
self.mainImageView.layer.cornerRadius = CGRectGetWidth(self.mainImageView.frame)/4.0
self.mainImageView.clipsToBounds = true
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
}
}
}
in swift 3 'CGRectGetWidth' has been replaced by property 'CGRect.width'
view.layer.cornerRadius = view.frame.width/4.0
view.clipsToBounds = true
Swift 3, Xcode 8, iOS 10
DispatchQueue.main.async {
self.mainImageView.layer.cornerRadius = self.mainImageView.bounds.size.width / 2.0
self.mainImageView.clipsToBounds = true
}
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
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
}
}
}
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
在Swift中试试这个:
self.photoView.layer.cornerRadius = self.photoView.frame.height/2
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