两层的名字，

    NSString* fileDirectory = [[[VoiceRecorderBaseVCgetCacheDirectory]stringByAppendingPathComponent:_fileName]stringByAppendingPathExtension:_type];

Printing description of self->tempFileName:

/var/mobile/Applications/934C1545-332F-4732-AD19-D08E126534EC/Documents/20140121151438.wav

(lldb) 

                  self.player = [self.player initWithContentsOfURL:[NSURL URLWithString:[VoiceRecorderBaseVC getPathByFileName:fileName ofType:@"wav"]] error:nil];

/var/mobile/Applications/934C1545-332F-4732-AD19-D08E126534EC/Documents//var/mobile/Applications/934C1545-332F-4732-AD19-D08E126534EC/Documents/20140121151438.wav.wav

self.player == nil,

两层的名字，

原文：http://www.cnblogs.com/guligei/p/3528459.html