ios - 通过 UIimageview 和 uiimagepicker 显示圆形图片

Question

Swift 的新手，无法设法找到最确定的方法来更改我的代码，使其能够根据从用户库中选择的图像裁剪图像，并在 ImageView 中显示为完整的圆形图像。

此外，我如何像 https://github.com/ruslanskorb/RSKImageCropper 这样呈现和图像裁剪器？在一个快速的项目中？

这是我一直在尝试的代码:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    let imagePicked = info[UIImagePickerControllerOriginalImage] as! UIImage
    let borderWidth: CGFloat = 1.5
    let cornerRadius:CGFloat = imageView.frame.height/2
imageView.layer.masksToBounds = false
imageView.layer.borderColor = UIColor.blackColor().CGColor
imageView.clipsToBounds = true


    // Create a multiplier to scale up the corner radius and border

    // width you decided on relative to the imageViewer frame such



    // that the corner radius and border width can be converted to

    // the UIImage's scale.


    let multiplier:CGFloat = imagePicked.size.height/imageView.frame.size.height > imagePicked.size.width/imageView.frame.size.width ?


        imagePicked.size.height/imageView.frame.size.height :
        imagePicked.size.width/imageView.frame.size.width

    let borderWidthMultiplied:CGFloat = borderWidth * multiplier

    let cornerRadiusMultiplied:CGFloat = cornerRadius * multiplier


    UIGraphicsBeginImageContextWithOptions(imagePicked.size, false, 0)

    let path = UIBezierPath(roundedRect: CGRectInset(CGRectMake(50, 50, imagePicked.size.width, imagePicked.size.height),

        borderWidthMultiplied / 2, borderWidthMultiplied / 2), cornerRadius: cornerRadiusMultiplied)

    let context = UIGraphicsGetCurrentContext()
    CGContextSaveGState(context)

    // Clip the drawing area to the path
    path.addClip()



    // Draw the image into the context
    imagePicked.drawInRect(CGRectMake(50, 50, imagePicked.size.width, imagePicked.size.height))
    CGContextRestoreGState(context)



    // Configure the stroke
    UIColor.blackColor().setStroke()
    path.lineWidth = borderWidthMultiplied



    // Stroke the border
    path.stroke()
    imageView.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    picker.dismissViewControllerAnimated(true, completion: nil)


}
func imagePickerControllerDidCancel(picker: UIImagePickerController)
{
    print("picker cancel.")
}

Answer 1

要使图像成为圆形，您的 imageView 应该是方形的....首先从 UIimagepicker 获取图像并将此图像设置为 UIimageview，它应该是方形的(等宽和等高)和 UIimageview *imageView = CGRectMake(x-axis,y-axis,side,side);

imageView.layer.cornerRadius = side/2;
imageView.clipToBounds = YES;

设置UIimageview的圆角半径为正方形边高的一半 其次，您必须将 clipsToBounds 属性设置为 YES 才能使图层正常工作。