How to set circle button with background image on right navigation bar item - ios

Question

I have tried to put circle button on right navigation bar of iOS but unfortunately When I use button background it doesn't round the image it shows square shape background image but When I remove image and put background colour it round the button with background colour.
Code that I tried:
let button = UIButton()
button.frame = CGRectMake(0, 0, 40, 40)
button.layer.cornerRadius = 0.5 * button.bounds.size.width
button.setImage(self.myPic, forState: .Normal)
let barButton = UIBarButtonItem()
barButton.customView = button
self.navigationItem.rightBarButtonItem = barButton

Answer 1

Try to use this code..
for rounded button with image -
let button = UIButton()
button.frame = CGRectMake(0, 0, 40, 40)
let color = UIColor(patternImage: UIImage(named: "btnImage")!)
button.backgroundColor = color
button.layer.cornerRadius = 0.5 * button.bounds.size.width
let barButton = UIBarButtonItem()
barButton.customView = button
self.navigationItem.rightBarButtonItem = barButton
With Actual image---
let button = UIButton()
button.frame = CGRectMake(0, 0, 40, 40)
let image = UIImage(named: "btnImage")!
UIGraphicsBeginImageContextWithOptions(button.frame.size, false, image.scale)
let rect = CGRectMake(0, 0, button.frame.size.width, button.frame.size.height)
UIBezierPath(roundedRect: rect, cornerRadius: rect.width/2).addClip()
image.drawInRect(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
let color = UIColor(patternImage: newImage)
button.backgroundColor = color
button.layer.cornerRadius = 0.5 * button.bounds.size.width
let barButton = UIBarButtonItem()
barButton.customView = button
self.navigationItem.rightBarButtonItem = barButton

Answer 2

I made a solution for Swift 4, you need to resize the image and the frame too
let avatarSize: CGFloat = 30
let button = UIButton()
button.frame = CGRect(x: 0, y: 0, width: avatarSize, height: avatarSize)
button.setImage(UIImage(named: "avatar")?.resizeImage(avatarSize, opaque: false), for: .normal)
if let buttonImageView = button.imageView {
button.imageView?.layer.cornerRadius = buttonImageView.frame.size.width / 2
button.imageView?.clipsToBounds = true
button.imageView?.contentMode = .scaleAspectFit
}
Extension you need:
extension UIImage {
func resizeImage(_ dimension: CGFloat, opaque: Bool, contentMode:
UIViewContentMode = .scaleAspectFit) -> UIImage {
var width: CGFloat
var height: CGFloat
var newImage: UIImage
let size = self.size
let aspectRatio = size.width/size.height
switch contentMode {
case .scaleAspectFit:
if aspectRatio > 1 { // Landscape image
width = dimension
height = dimension / aspectRatio
} else { // Portrait image
height = dimension
width = dimension * aspectRatio
}
default:
fatalError("UIIMage.resizeToFit(): FATAL: Unimplemented ContentMode")
}
if #available(iOS 10.0, *) {
let renderFormat = UIGraphicsImageRendererFormat.default()
renderFormat.opaque = opaque
let renderer = UIGraphicsImageRenderer(size: CGSize(width: width, height: height), format: renderFormat)
newImage = renderer.image {
(context) in
self.draw(in: CGRect(x: 0, y: 0, width: width, height: height))
}
} else {
UIGraphicsBeginImageContextWithOptions(CGSize(width: width, height: height), opaque, 0)
self.draw(in: CGRect(x: 0, y: 0, width: width, height: height))
newImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
}
return newImage
}
}

Answer 3

swift 2
set bar button in circle
func setProfileImageOnBarButton() {
let button = UIButton()
button.setImage(profileImage, forState: UIControlState.Normal)
button.addTarget(self, action:#selector(self.openUserProfile), forControlEvents: UIControlEvents.TouchUpInside)
button.frame = CGRectMake(0, 0, 36, 36)
button.layer.cornerRadius = CGRectGetWidth(button.frame) / 2
button.layer.masksToBounds = true
let barButton = UIBarButtonItem(customView: button)
self.navigationItem.rightBarButtonItem = barButton
}

Answer 4

Swift 5 - You can simply do that, and make sure you make clipstobounds to true
teacherImage.setImage(UIImage(named: "icon_profile"), for: .normal)
teacherImage.frame = CGRect(x: 0, y: 0, width: 40, height: 40)
teacherImage.addTarget(self, action: #selector(addPressed), for: .touchUpInside)
teacherImage.layer.cornerRadius = 0.5 * teacherImage.bounds.size.width
teacherImage.clipsToBounds = true
let rightNavBarButton = UIBarButtonItem(customView: teacherImage)
let currWidth = rightNavBarButton.customView?.widthAnchor.constraint(equalToConstant: 40)
currWidth?.isActive = true
let currHeight = rightNavBarButton.customView?.heightAnchor.constraint(equalToConstant: 40)
currHeight?.isActive = true
self.navigationItem.rightBarButtonItem = rightNavBarButton

Answer 5

It works for Objective-C. Have a try!
UIButton *avatarButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
// redraw the image to fit new size
UIGraphicsBeginImageContextWithOptions(avatarButton.frame.size, NO, 0);
[[UIImage imageNamed:#"pikachu"] drawInRect:CGRectMake(0, 0, avatarButton.frame.size.width, avatarButton.frame.size.height)];
UIImage *resultImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIColor *color = [UIColor colorWithPatternImage: resultImage];
avatarButton.backgroundColor = color;
avatarButton.layer.cornerRadius = 0.5 * avatarButton.bounds.size.width;
UIBarButtonItem *barButton = UIBarButtonItem.new;
barButton.customView = avatarButton;
self.navigationItem.rightBarButtonItem = barButton;