How to write / get latitude longitude with image in uiimagepickercontroller?

Question

I am currently saving and drawing the following method in the album of saved photos.

UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil); 

Now I want to associate the current latitude and longitude with this image.

How can i do this?

Can I do this with my media texter (metadata).

I work in ios sdk 3.0.

Please tell me how to get / set the geodata with the image in the UIImageViewPickerController

Answer 1

AFAIK is not supported on iOS 4.0 and below.

As with iOS 4.1, you can use -[ALAssetsLibrary writeImageToSavedPhotosAlbum:metadata:completionBlock:] to save images with metadata (untested, but I assume this should work). However, I do not know how to format the metadata dictionary.

You should try reading some existing geodata images from the resource library to check how the dictionary should be formatted.

Answer 2

I am afraid that you will not be able to do this with UIImageWriteToSavedPhotosAlbum.

However, you can use a different method to save to the iphone file system (but not in the "saved photo album"). Then you save your metadata in another text file, following the image path:

For PNG:

 [UIImagePNGRepresentation(image) writeToFile: uniquePath atomically: YES]; 

For jpg:

 [UIImageJPEGRepresentation(image, 1.0) writeToFile:jpgPath atomically:YES]; 

Answer 3

If you get an image from the camera, you must get it from the CLLocationManager. If you select an image from the library, you can read the location coordinates using ALAssertsLibrary:

iPhone Get UIImagePickerController Lat / Lng

Once you have a place, you can use the exif library to save the data with the image.

Answer 4

you cannot get the latitude and longitude from the image that comes from uiimagepickercontroller. It seems that the tags are exif files with gambling feeds (I think for privacy reasons).