objective-c - 使用 NSApplicationSupportDirectory 创建新目录时附加 NSString

Question

我在使用 NSApplicationSupportDirectory 时一直尝试在应用程序支持文件夹内创建一个新文件；我可以向其中写入文件，但无法在应用程序支持中创建文件夹。

NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *applicationDirectory =  [paths objectAtIndex:0];  

//make a file name to write the data to using the application support: (attempting to create the blasted directory inside of application support directory
NSString *fileName = [NSString stringWithFormat:@"%@/managersemail.txt",
                      applicationDirectory];
//create content - formats with the managersemail.txt location
NSString* content = [NSString stringWithFormat:@"%@",[nameField stringValue]];
//save content to the documents directory
[content writeToFile:fileName
          atomically:NO
            encoding:NSStringEncodingConversionAllowLossy
               error:nil];


NSDictionary* errorDict;

我上面列出的代码工作得很好，除了关于创建我想要放置managersemail.txt的文件夹的部分。我尝试模仿 NSString* 内容中列出的 stringWithFormat，然后改变多种方法，但无济于事!有什么想法吗？

NSAppleEventDescriptor* returnDescriptor = NULL;

Answer 1

也许 solution Cocoa with Love 上提供的可能有用吗？

摘录:

- (NSString *)findOrCreateDirectory:(NSSearchPathDirectory)searchPathDirectory
    inDomain:(NSSearchPathDomainMask)domainMask
    appendPathComponent:(NSString *)appendComponent
    error:(NSError **)errorOut
{
    // Search for the path
    NSArray* paths = NSSearchPathForDirectoriesInDomains(
        searchPathDirectory,
        domainMask,
        YES);
    if ([paths count] == 0)
    {
        // *** creation and return of error object omitted for space
        return nil;
    }

    // Normally only need the first path
    NSString *resolvedPath = [paths objectAtIndex:0];

    if (appendComponent)
    {
        resolvedPath = [resolvedPath
            stringByAppendingPathComponent:appendComponent];
    }

    // Check if the path exists
    BOOL exists;
    BOOL isDirectory;
    exists = [self
        fileExistsAtPath:resolvedPath
        isDirectory:&isDirectory];
    if (!exists || !isDirectory)
    {
        if (exists)
        {
            // *** creation and return of error object omitted for space
            return nil;
        }

        // Create the path if it doesn't exist
        NSError *error;
        BOOL success = [self
            createDirectoryAtPath:resolvedPath
            withIntermediateDirectories:YES
            attributes:nil
            error:&error];
        if (!success) 
        {
            if (errorOut)
            {
                *errorOut = error;
            }
            return nil;
        }
    }

    if (errorOut)
    {
        *errorOut = nil;
    }
    return resolvedPath;
}