裁剪UIImage失败

Question

我试图从UIImagePicker中裁剪一个图像到一个特定的矩形，但我收到的是深色而不是图像（这似乎是图像的颜色主题）。

首先是我的imagePicker函数。

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
         let originalImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        imagePicker.dismiss(animated: true, completion: nil)
        if originalImage == nil { print("Error Not Found An Image")}
            imageView.image = originalImage
            let croppedImage = cropImage(image: originalImage, rect: CGRect(x: 0.13, y: 0.12, width: 0.74, height: 0.75))
            imageView.image = croppedImage
}

还有我的裁剪函数

    func cropImage (image: UIImage, rect: CGRect) -> UIImage {

        let resImage = CIImage(image: image, options: [:])
        let croppedImage = resImage?.cropped(to: rect)
        let img = UIImage(ciImage: croppedImage!, scale: 1, orientation: image.imageOrientation)

        return img
    }

Answer 1

问题出在矩形的值上。在我的例子中，它们实在是太小了。

谢谢badhanganesh的提示。