Your comments


Can you confirm that your app does not alter the quality and size of the photos during transfer? As a test, I checked the CRC of both the source and the transferred photo, and they differed. Do you know what of the photo is changed during the transfer (Is it just meta-data? If so, what?)?
I understand. This makes sense. Do you know for a fact that the iPad "Photo" tab uses EXIF data on the "photo creation date" to do the sorting, whereas the "Camera Roll" tab uses perhaps the image filename to do the sorting? Is this documented somewhere on Apple's website?

BTW, the 4.0 update is great. I like the authentication, the new interface, and the animation of the thumbnails being transferred. The latter is particularly useful in keeping track of progress during a long transfer. Very pleased with this update.
I see. Am I correct that this problem is NOT related specifically to iPhone to iPad transfer? I ask because the SAME photos when transferred from iPad to iPhone were sorted correctly on the iPhone. If this is related to the EXIF data, then how come the transfer is incorrectly sorted one way but correctly sorted another way. Which is the source and Which is the destination seems to be an issue in whether or not this bug occurs.
Hi Enrique,

You made a very interesting observation. When I have the photos shown with the "default" setting (the "Photo" tab), the sorting order is incorrect as I have previously stated. However, if I relist the photos under the "Camera Roll" via the "Album" tab, the sorting order is now correct.

Can you explain why? This seems to be an important clue.
Updated. With 4.0, still the same.

Again, I want to emphasize that this behavior is only from iPhone to iPad (not iPhone to iPhone) and only with photos that had themselves been transferred previously using the app. Photos created natively with the device (iPhone) are transferred correctly to the iPad with the correct sort order. I wonder if those photos that are giving problems have somehow been corrupted by the app and messed up the date.
Hello, Enrique,

I understand that the expected behavior is that the saved photos from the transfer will be placed as the LAST photos on the camera roll, AFTER the photos already on the device. This is what I wanted as well. What I am reporting here (possibly a bug) is that if the transfer is done from an iPhone to an iPad, for photos that were previously transferred to the iPhone from another device, the photos sent to the iPad are placed BEFORE (not after) the photos already on the device. In this scenario, the transferred photos appeared in the camera roll as if they were the FIRST photos on the camera. This is not the expected behavior, thus I want to ask if this is a bug.
Wow. Two days and no reply from the developer. :(
No, CRC is filename independent. Can Enrique give some theories as to why this is so. This is very important to me as I entirely determine what I can and cannot use your app to trasnfer Photos from my Camera Rolls.
Hi, Enrique,

If every byte of a file is recreated exactly, how can the CRC be different? Are the meta data somehow subtly altered? as far as I know, CRC should not be altered because the file has been transferred over by different means.