crop image in circular shape - iphone

Question

I am creating an application in which i am displaying one .jpg image. I want to crop part of image in circular shape. Please help me to solve this problem.
image = [UIImage imageNamed:#"images2.jpg"];
imageView = [[UIImageView alloc] initWithImage:image];
CGSize size = [image size];
[imageView setFrame:CGRectMake(0, 0, size.width, size.height)];
[[self view] addSubview:imageView];
[imageView release];
Please tell me to crop part of image in circular shape

Answer 1

You can do it by using Quartz Core framework it really has some cool Apis to do that. Check this RoundedImageView example.

Answer 2

Methinks this is a duplicate. There's an excellent accepted answer in this question, and links to other articles: How to crop UIImage on oval shape or circle shape?
EDIT: There's a handful of easy ways of going about this. A CALayer with a cornerRadius being obvious. But more importantly, there exists the method CGImageCreateWithMask: which can be applied to a broader spectrum of up to and including circles and other shapes. Note that if your image is a JPEG, then CGImageCreateWithMask will return a black background because JPEG's have no alpha channel.

Answer 3

You can use RSKImageCropper for crop the image in circular shape. I am implemented the fallowing code to crop the image in circular shape with the help of RSKImageCropper.
1. Install the pod RSKImageCropper.
2. #import <RSKImageCropper/RSKImageCropper.h> in your viewcontroller
3. Add delegate to your interface i.e. RSKImageCropViewControllerDelegate
4. Implement the fallowing code in **didFinishPickingMediaWithInfo** delegate.
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
[picker dismissViewControllerAnimated:YES completion:
^{
RSKImageCropViewController *imageCropVC = [[RSKImageCropViewController alloc] initWithImage:originalImage];
imageCropVC.avoidEmptySpaceAroundImage = YES;
imageCropVC.delegate = self;
[self presentViewController:imageCropVC animated:NO completion:nil];
}];
}
5. Now implement the delegate of RSKImageCropper.
- (void)imageCropViewControllerDidCancelCrop:(RSKImageCropViewController *)controller
{
[controller dismissViewControllerAnimated:NO completion:nil];
}
// The original image has been cropped.
- (void)imageCropViewController:(RSKImageCropViewController *)controller
didCropImage:(UIImage *)croppedImage
usingCropRect:(CGRect)cropRect
{
self.imgVIew.image = croppedImage;
[self.navigationController popViewControllerAnimated:YES];
}
// The original image has been cropped. Additionally provides a rotation angle used to produce image.
- (void)imageCropViewController:(RSKImageCropViewController *)controller
didCropImage:(UIImage *)croppedImage
usingCropRect:(CGRect)cropRect
rotationAngle:(CGFloat)rotationAngle
{
self.imgVIew.image = croppedImage;
[controller dismissViewControllerAnimated:NO completion:nil];
}
For more info check this https://github.com/ruslanskorb/RSKImageCropper