Xamarin.iOS Crop Image without Resize


Example

// crop the image, without resizing
public static UIImage CropImage(this UIImage sourceImage, int crop_x, int crop_y, int width, int height)
{
    var imgSize = sourceImage.Size;
    UIGraphics.BeginImageContext(new SizeF(width, height));
    var context = UIGraphics.GetCurrentContext();
    var clippedRect = new RectangleF(0, 0, width, height);
    context.ClipToRect(clippedRect);
    var drawRect = new CGRect(-crop_x, -crop_y, imgSize.Width, imgSize.Height);
    sourceImage.Draw(drawRect);
    var modifiedImage = UIGraphics.GetImageFromCurrentImageContext();
    UIGraphics.EndImageContext();
    return modifiedImage;
}