如何快速设置圆形图像

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If you mean you want to make a UIImageView circular in Swift you can just use this code:

imageView.layer.cornerRadius = imageView.frame.height / 2
imageView.clipsToBounds = true

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最佳答案

import UIKit


class ViewController: UIViewController {
@IBOutlet weak var image: UIImageView!


override func viewDidLoad() {
super.viewDidLoad()
    

image.layer.borderWidth = 1
image.layer.masksToBounds = false
image.layer.borderColor = UIColor.black.cgColor
image.layer.cornerRadius = image.frame.height/2
image.clipsToBounds = true
}

If you want it on an extension

import UIKit


extension UIImageView {
    

func makeRounded() {
        

layer.borderWidth = 1
layer.masksToBounds = false
layer.borderColor = UIColor.black.cgColor
layer.cornerRadius = self.frame.height / 2
clipsToBounds = true
}
}

That is all you need....

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Don't know if this helps anyone but I was struggling with this problem for awhile, none of the answers online helped me. For me the problem was I had different heights and widths set on the image in storyboard. I tried every solution on stack and it turns out it was something as simple as that. Once I set them both to 200 my circle profile image was perfect. This was code then in my VC.

profileImage2.layer.cornerRadius = profileImage2.frame.size.width/2
profileImage2.clipsToBounds = true

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First you need to set equal width and height for getting Circular ImageView.Below I set width and height as 100,100.If you want to set equal width and height according to your required size,set here.

 var imageCircle = UIImageView(frame: CGRectMake(0, 0, 100, 100))

Then you need to set height/2 for corner radius

 imageCircle.layer.cornerRadius = imageCircle.frame.size.height/2
imageCircle.layer.borderWidth = 1
imageCircle.layer.borderColor = UIColor.blueColor().CGColor
imageCircle.clipsToBounds = true
self.view.addSubview(imageCircle)

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You can simple create extension:

import UIKit


extension UIImageView {


func setRounded() {
let radius = CGRectGetWidth(self.frame) / 2
self.layer.cornerRadius = radius
self.layer.masksToBounds = true
}
}

and use it as below:

imageView.setRounded()

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If your image is rounded, it would have a height and width of the exact same size (i.e 120). You simply take half of that number and use that in your code (image.layer.cornerRadius = 60).

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All the answers above couldn't solve the problem in my case. My ImageView was placed in a customized UITableViewCell. Therefore I had also call the layoutIfNeeded() method from here. Example:

 class NameTableViewCell:UITableViewCell,UITextFieldDelegate { ...


override func awakeFromNib() {


self.layoutIfNeeded()
profileImageView.layoutIfNeeded()


profileImageView.isUserInteractionEnabled = true
let square = profileImageView.frame.size.width < profileImageView.frame.height ? CGSize(width: profileImageView.frame.size.width, height: profileImageView.frame.size.width) : CGSize(width: profileImageView.frame.size.height, height:  profileImageView.frame.size.height)
profileImageView.addGestureRecognizer(tapGesture)
profileImageView.layer.cornerRadius = square.width/2
profileImageView.clipsToBounds = true;
}

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Based in the answer of @DanielQ

Swift 4 and Swift 3

import UIKit


extension UIImageView {


func setRounded() {
self.layer.cornerRadius = (self.frame.width / 2) //instead of let radius = CGRectGetWidth(self.frame) / 2
self.layer.masksToBounds = true
}
}

You can use it in any ViewController with:

imageView.setRounded()

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For Swift3/Swift4 Developers:

let radius = yourImageView.frame.width / 2
yourImageView.layer.cornerRadius = radius
yourImageView.layer.masksToBounds = true

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For Swift 4:

import UIKit


extension UIImageView {


func makeRounded() {
let radius = self.frame.width/2.0
self.layer.cornerRadius = radius
self.layer.masksToBounds = true
}
}

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This way is the least expensive way and always keeps your image view rounded:

class RoundedImageView: UIImageView {


override init(frame: CGRect) {
super.init(frame: frame)


clipsToBounds = true
}


required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)


clipsToBounds = true
}


override func layoutSubviews() {
super.layoutSubviews()


assert(bounds.height == bounds.width, "The aspect ratio isn't 1/1. You can never round this image view!")


layer.cornerRadius = bounds.height / 2
}
}

The other answers are telling you to make views rounded based on frame calculations set in a UIViewControllers viewDidLoad() method. This isn't correct, since it isn't sure what the final frame will be.

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// code to make the image round




import UIKit


extension UIImageView {
public func maskCircle(anyImage: UIImage) {




self.contentMode = UIViewContentMode.ScaleAspectFill
self.layer.cornerRadius = self.frame.height / 2
self.layer.masksToBounds = false
self.clipsToBounds = true








// make square(* must to make circle),
// resize(reduce the kilobyte) and
// fix rotation.
//        self.image = prepareImage(anyImage)
}
}

// to call the function from the view controller

self.imgCircleSmallImage.maskCircle(imgCircleSmallImage.image!)

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struct CircleImage: View {
var image: Image


var body: some View {
image
.clipShape(Circle())
}
}

This is correct for SwiftUI

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imageView.layer.cornerRadius = imageView.frame.height/2
imageView.clipToBounds = true

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For Rounded Image, Only following code would be enough in Extension:

self.layoutIfNeeded() // in case of autolayout(mentioned by Tom Spee in the comment).

And also make sure the property of UIImageView contentMode should be set correctly to get the result. In my case it is:

imageView.contentMode = .scaleAspectFit




extension UIImageView {
func setRounded() {
self.layoutIfNeeded()
self.layer.cornerRadius = self.frame.height / 2
self.clipsToBounds = true
}
}

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extension UIImageView{
   

// Round Image
func roundCorner() {
self.layer.masksToBounds = true
self.layer.borderWidth = 1.0
self.layer.borderColor = UIColor.clear.cgColor
self.layer.cornerRadius = self.frame.size.width/2
}
}