小编Din*_* Kc的帖子

我有一幅带有大量exif信息的图像。但是，当尝试快速读取exif信息时，它显示的exif信息数量有限。

我尝试了以下代码：

let data = UIImageJPEGRepresentation(image, 1.0)
let source = CGImageSourceCreateWithData(data! as CFData, nil)
let metadata = (CGImageSourceCopyPropertiesAtIndex(source!, 0, nil))
debugPrint(metadata ?? "nil")

并显示以下结果：

    {
    ColorModel = RGB;
    Depth = 8;
    Orientation = 6;
    PixelHeight = 2448;
    PixelWidth = 3264;
    ProfileName = "sRGB IEC61966-2.1";
    "{Exif}" =     {
        ColorSpace = 1;
        PixelXDimension = 3264;
        PixelYDimension = 2448;
    };
    "{JFIF}" =     {
        DensityUnit = 0;
        JFIFVersion =         (
            1,
            0,
            1
        );
        XDensity = 72;
        YDensity = 72;
    };
    "{TIFF}" …