ios - GPS 坐标没有出现在 UIImagePickerControllerMediaMetadata 中

Question

我试图从相机点击的图像的元数据中获取位置。

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSDictionary *metadata = [info objectForKey: UIImagePickerControllerMediaMetadata];
    NSLog(@"%@",metadata);


}

我得到的日志是

{
DPIHeight = 72;
DPIWidth = 72;
Orientation = 6;
"{Exif}" =     {
    ApertureValue = "2.526068811667588";
    BrightnessValue = "1.530886431890497";
    ColorSpace = 1;
    DateTimeDigitized = "2013:01:11 14:58:42";
    DateTimeOriginal = "2013:01:11 14:58:42";
    ExposureMode = 0;
    ExposureProgram = 2;
    ExposureTime = "0.0303030303030303";
    FNumber = "2.4";
    Flash = 32;
    FocalLenIn35mmFilm = 35;
    FocalLength = "1.85";
    ISOSpeedRatings =         (
        320
    );
    MeteringMode = 5;
    PixelXDimension = 640;
    PixelYDimension = 480;
    SceneType = 1;
    SensingMethod = 2;
    ShutterSpeedValue = "5.058893689053568";
    WhiteBalance = 0;
};
"{TIFF}" =     {
    DateTime = "2013:01:11 14:58:42";
    Make = Apple;
    Model = "iPad 2";
    Software = "6.0";
    XResolution = 72;
    YResolution = 72;
};
}

但是没有gps坐标。注意-我的班级没有核心位置管理器。我不确定是否需要。我是否必须使用核心位置服务以编程方式将 GPS 坐标添加到我的图像中？