ios - How to crop UIImage on oval shape or circle shape?

Question

Please give ideas for how to crop UIImage on oval shape or circle shape. Please share your ideas.

question from:https://stackoverflow.com/questions/6530573/how-to-crop-uiimage-on-oval-shape-or-circle-shape

Answer 1

#import <QuartzCore/QuartzCore.h>

CALayer *imageLayer = YourImageview.layer;
        [imageLayer setCornerRadius:5];
        [imageLayer setBorderWidth:1];
        [imageLayer setMasksToBounds:YES];

by increasing radius it will become more round-able.

As long as the image is a square, you can get a perfect circle by taking half the width as the corner radius:

[imageView.layer setCornerRadius:imageView.frame.size.width/2]; 

You also need to add

[imageView.layer setMasksToBounds:YES];

Swift 4.2

import QuartzCore

var imageLayer: CALayer? = YourImageview.layer
imageLayer?.cornerRadius = 5
imageLayer?.borderWidth = 1
imageLayer?.masksToBounds = true