How to set corner radius of imageView

Question

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

User · Answer

in swift 3  CGRectGetWidth  has been replaced by property  CGRect width       view layer cornerRadius   view frame width 4 0     view clipsToBounds   true

User · Answer

try this  self mainImageView layer cornerRadius   CGRectGetWidth self mainImageView frame  4 0 self mainImageView clipsToBounds   true

User · Answer

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

User · Answer

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

User · Answer

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  gt  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

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

Swift 3  Xcode 8  iOS 10  DispatchQueue main async     self mainImageView layer cornerRadius   self mainImageView bounds size width   2 0   self mainImageView clipsToBounds   true

[ios] How to set corner radius of imageView?

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