Example Demo
是的，您可以在UIImagePickerController中添加RSKImageCropper
定义imagePicker

var imagePicker : UIImagePickerController!

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单位：ViewDidLoad

imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary;
    self.presentViewController(imagePicker, animated: true, completion: nil)

型
委托方式：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject])
{

    var image : UIImage = (info[UIImagePickerControllerOriginalImage] as? UIImage)!

    picker.dismissViewControllerAnimated(false, completion: { () -> Void in

        var imageCropVC : RSKImageCropViewController!

        imageCropVC = RSKImageCropViewController(image: image, cropMode: RSKImageCropMode.Circle)

        imageCropVC.delegate =self

        self.navigationController?.pushViewController(imageCropVC, animated: true)

    })

}

型
参见：

的数据

Kirit Modi的回答正是我所需要的，尽管我需要做一件事来实现这一目标。对于那些没有下载测试项目的人，请确保实现了委托方法：
Swift 3：

extension YourViewControllerClass: RSKImageCropViewControllerDelegate {

    func imageCropViewControllerDidCancelCrop(_ controller: RSKImageCropViewController) {
        _ = self.navigationController?.popViewController(animated: true)
    }

    func imageCropViewController(_ controller: RSKImageCropViewController, didCropImage croppedImage: UIImage, usingCropRect cropRect: CGRect) {
        self.avatarImageView.image = croppedImage
        _ = self.navigationController?.popViewController(animated: true)
    }

}

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Swift 2：

extension YourViewControllerClass: RSKImageCropViewControllerDelegate {

    func imageCropViewControllerDidCancelCrop(controller: RSKImageCropViewController) {
        self.navigationController?.popViewControllerAnimated(true)
    }

    func imageCropViewController(controller: RSKImageCropViewController, didCropImage croppedImage: UIImage, usingCropRect cropRect: CGRect) {
        self.avatarImageView.image = croppedImage
        self.navigationController?.popViewControllerAnimated(true)
    }

}

型

对于Swift 2.2：
将委托方法添加到类中：

class ViewController: UIViewController, UIImagePickerControllerDelegate, RSKImageCropViewControllerDelegate, UINavigationControllerDelegate

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定义imagePicker

var imagePicker : UIImagePickerController!

型
在viewDidLoad（）中

imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(imagePicker, animated: true, completion: nil)

型
和委托方法：

func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {

    let image : UIImage = image
    picker.dismissViewControllerAnimated(false, completion: { () -> Void in
        var imageCropVC : RSKImageCropViewController!
        imageCropVC = RSKImageCropViewController(image: image, cropMode: RSKImageCropMode.Circle)
        imageCropVC.delegate = self
        self.navigationController?.pushViewController(imageCropVC, animated: true)  
    })  
}

型
当然要为目标C级做桥梁
链接到RSKImageCrop