如何快速裁剪图​​像

Question

我想从相机中裁剪图像，所以相机中有一个矩形边框，结果将是裁剪后的图像 喜欢这张图片

The Image

Answer 1

expectedResult = [i for i in my_list if i['source'] == 'family']

Answer 2

嗨，您可以使用此代码调整图片的大小。

Answer 3

将Apple's developer documentation与Pranavan Sp弃用的答案结合起来，跳过钟声，您将得到：

extension UIImage {

    func cropToRect(rect: CGRect!) -> UIImage? {

        let scaledRect = CGRect(x: rect.origin.x * self.scale, y: rect.origin.y * self.scale, width: rect.size.width * self.scale, height: rect.size.height * self.scale);


        guard let imageRef: CGImage = self.cgImage?.cropping(to:scaledRect)
        else {
            return nil
        }

        let croppedImage: UIImage = UIImage(cgImage: imageRef, scale: self.scale, orientation: self.imageOrientation)
        return croppedImage
    }
}