5

I would like to know if there is any way to detect if the iphone music library has changed when my app is not running.

There is a property lastModifiedDate in MPMediaLibrary class which does this but the problem i am facing is that this date changes even if the iPhone is not synced. The date generally changes if the now playing list or current playing list is changed in iPod.

Is there any other way to detect if the iPhone is synced?

Dhawal
  • 185
  • 2
  • 11
  • Plus i am not completely sure when the lastModifiedDate is changing apart from change in current pLaying list. – Dhawal Feb 02 '11 at 07:43

2 Answers2

0

You could use the lastModifiedDate and when the application is closed record the status of the playlists and then when the app is opened and the lastModifiedDate has changed: compare the current and previous playlists.

Alex Stuckey
  • 1,250
  • 1
  • 14
  • 28
  • HI Alex, Thanx for reply. The problem arises even if the now playing list or current playing list is changed in iPod and there is now way to get the current playing list of the iPod (if there is, please let me know!). By your method, i can store the previous playlist(coz the playlist is set my app while it exists) but cant get the current playlist for comparison. – Dhawal Feb 02 '11 at 07:39
0

If a device sync with iTunes, it will clear the tmp folder under all apps. Therefore you may create a blank file in tmp, and next time when your application launch and found the file is missing, the device should have been synced. To obtain the tmp folder path, use NSTemporaryDirectory()

howanghk
  • 3,070
  • 2
  • 21
  • 34
  • Thanks @Owen, will check it out today – Dhawal Feb 21 '11 at 07:54
  • HI, again. I hv tried this way but the file in temp dir is not deleted when iphone is synced. I am testing in iOS 3.1.3 – Dhawal Feb 21 '11 at 09:25
  • I found that a few years ago, at that time I accidentally used NSTemporaryDirectory() instead of NSHomeDirectory() and a save file ended up saved in /tmp/Documents/ instead of /Documents/, which cause the save file deleted every time I sync the device. That was a bug that I spent over a week on so I am quite sure on this. Maybe Apple changed this behavior later on. – howanghk Feb 21 '11 at 17:07
  • As of iOS 8 this method does not work. Any other suggestions? – Raj Aug 31 '15 at 14:00