Question

我是IOS的新手，所以我不知道我错过了什么，但我已经通过this网站从图片中获取位置详细信息，但没有运气。如果有人能提供帮助，那就太棒了。以下代码位于 UIImagepicker的 didFinishPickingMediaWithInfo 函数内

NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                             [NSNumber numberWithBool:NO], (NSString *)kCGImageSourceShouldCache,
                             nil];
     NSLog(@"Image properties %@",imageProperties);
    NSData *data=UIImageJPEGRepresentation(img, 0);
    CGImageSourceRef source=CGImageSourceCreateWithData((CFDataRef)data, NULL);
    CFDictionaryRef imageProperties = CGImageSourceCopyPropertiesAtIndex(source, 0, (CFDictionaryRef)options);


    CFDictionaryRef gps = CFDictionaryGetValue(imageProperties, kCGImagePropertyGPSDictionary);
    NSLog(@"GPS %@",gps);
    if (gps) {
        NSString *latitudeString = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLatitude);
        NSString *latitudeRef = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLatitudeRef);
        NSString *longitudeString = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLongitude);
        NSString *longitudeRef = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLongitudeRef);
        NSLog(@"GPS Coordinates: %@ %@ / %@ %@", longitudeString, longitudeRef, latitudeString, latitudeRef);
    }

输出：

Image properties
{
ColorModel = RGB;
Depth = 8;
Orientation = 6;
PixelHeight = 720;
PixelWidth = 960;
"{Exif}" =     {
    ColorSpace = 1;
    PixelXDimension = 960;
    PixelYDimension = 720;
};
"{JFIF}" =     {
    DensityUnit = 0;
    JFIFVersion =         (
        1,
        0,
        1
    );
    XDensity = 72;
    YDensity = 72;
};
"{TIFF}" =     {
    Orientation = 6;
};
}
GPS (null)

Pic of Image GetInfo

因此Image确实附加了位置，但在获取时，它显示地理位置为null。

谢谢。

从图像访问地理定位细节 - ios 8.3

0 个答案: