我已经多次测试该方法,可以肯定的一件事,当照片库发生变化时,该方法被调用。但是在更改之后,该方法将被再次调用两次(不做任何事情)。有谁知道为什么
2015-08-25 14:16:04.420 PhotoLibrary[25742:3293667] enter photoLibraryDidChange methods
2015-08-25 14:16:04.445 PhotoLibrary[25742:3283461] something inserted.
2015-08-25 14:16:17.199 PhotoLibrary[25742:3293667] enter photoLibraryDidChange methods
2015-08-25 14:16:17.522 PhotoLibrary[25742:3293668] enter photoLibraryDidChange methods
2015-08-25 14:17:04.762 PhotoLibrary[25742:3295134] enter photoLibraryDidChange methods
2015-08-25 14:17:04.796 PhotoLibrary[25742:3283461] something changed.
2015-08-25 14:17:18.056 PhotoLibrary[25742:3295135] enter photoLibraryDidChange methods
2015-08-25 14:17:18.366 PhotoLibrary[25742:3295137] enter photoLibraryDidChange methods
2015-08-25 14:18:22.915 PhotoLibrary[25742:3297134] enter photoLibraryDidChange methods
2015-08-25 14:18:22.932 PhotoLibrary[25742:3283461] something changed.
2015-08-25 14:18:34.275 PhotoLibrary[25742:3297133] enter photoLibraryDidChange methods
2015-08-25 14:18:34.602 PhotoLibrary[25742:3297130] enter photoLibraryDidChange methods