Swift 图片元数据创建日期

Question

我正在尝试从 iOS 图片上传中使用 Swift 并获取图片 metaDate 示例创建日期，但我没有得到完整的信息：

{
ColorModel = RGB;
Depth = 8;
Orientation = 1;
PixelHeight = 2080;
PixelWidth = 1170;
ProfileName = "sRGB IEC61966-2.1";
"{Exif}" =     {
    ColorSpace = 1;
    PixelXDimension = 1170;
    PixelYDimension = 2080;
};
"{JFIF}" =     {
    DensityUnit = 0;
    JFIFVersion =         (
        1,
        0,
        1
    );
    XDensity = 72;
    YDensity = 72;
};
"{TIFF}" =     {
    Orientation = 1;
};

}

我的快速代码：

        let imageData: Data = image.jpegData(compressionQuality: 1)!
        let source = CGImageSourceCreateWithData(imageData as CFData, nil)!
        let metadata = CGImageSourceCopyPropertiesAtIndex(source, 0, nil)!
       
        print(metadata)

而且我的图片有创建日期，因为我检查了另一个应用程序并看到了完整的元数据

Answer 1

以下是我在试验图像元数据时在游乐场创建的一个函数，它使用来自 URL 的文件，但如果您改用 CGImageSourceCreateWithData，它应该对您有用

func createDate(for url: URL) -> String? {
    guard let imageSource = CGImageSourceCreateWithURL(url as CFURL, nil),
          let properties = CGImageSourceCopyMetadataAtIndex(imageSource, 0, nil) else {
        return nil
    }
    let datePath = "xmp:CreateDate" as CFString
    return CGImageMetadataCopyStringValueWithPath(properties, nil, datePath) as String?
}