Cocoa contentsOfDirectoryAtPath:方法因某些用户的错误而失败-Mac OS X

下面是代码片段:

// Get into the data folder of it
keychainPath = [keychainPath stringByAppendingPathComponent:@"data/default"];

DLog(@"Keychain data path: %@", keychainPath);

// Define Filemanager
NSFileManager *fm = [NSFileManager defaultManager];

// Catch any errors
NSError *dataError = nil;

// get all the files in the directory
NSArray *dataFiles = [fm contentsOfDirectoryAtPath:keychainPath error:&dataError];

if(!dataFiles)
 NSLog(@"Error: %@",dataError);

现在,这对大多数人来说都很好,但也有少数人报告了问题,其中“dataError”对象给出:

  Error: Error
Domain=NSCocoaErrorDomain Code=260 UserInfo=0x14d1fa10 "The folder
“default” doesn’t exist." Underlying Error=(Error
Domain=NSOSStatusErrorDomain Code=-43 "The operation couldn’t be
completed. (OSStatus error -43.)" (File not found))

有这个问题的人说文件/文件夹“default”确实存在,所以我不知道为什么它不起作用。

任何帮助都将不胜感激!