if ([fileManager isWritableFileAtPath:@"FilePath"]) {
      NSLog(@"isWritable");
   }
   if ([fileManager isReadableFileAtPath:@"FilePath"]) {
      NSLog(@"isReadable");
   }
   if ( [fileManager isExecutableFileAtPath:@"FilePath"]){
      NSLog(@"is Executable");
   }
//objectc/8540