NSFileManager createDirectoryAtPath:withIntermediateDirectories: 不创建目录或创建错误

Question

在我的应用中，当用户进行应用内购买时，应用需要下载一个 zip 文件并将其解压缩到应用的文档文件夹中。 zip 文件下载并可以解压缩。我正在使用Objective Zip 解压缩存档。问题是当尝试为每个文件创建文件夹路径时，文件夹永远不会创建，并且没有错误。

这是发生这种情况的部分的一些示例代码：

// Create file manager
NSFileManager *fileMgr = [NSFileManager defaultManager];

//Unzip
NSString *applicationDocumentsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
ZipFile *unzipFile = [[ZipFile alloc] initWithFileName:[applicationDocumentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip",@"Mid America Oireachtas 2011"]] mode:ZipFileModeUnzip];
NSArray *infos= [unzipFile listFileInZipInfos];
for (FileInZipInfo *info in infos) {
    //NSLog(@"- %@ %@ %d (%d)", info.name, info.date, info.size, info.level);

    // Locate the file in the zip
    [unzipFile locateFileInZip:info.name];

    // Expand the file in memory
    ZipReadStream *read= [unzipFile readCurrentFileInZip];
    NSMutableData *data= [[NSMutableData alloc] initWithLength:info.length];
    int bytesRead = [read readDataWithBuffer:data];
    [read finishedReading];
    NSString *appSupportFolder = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    NSString *pathfull = [appSupportFolder stringByAppendingPathComponent:info.name];
    NSString *path = [[pathfull stringByDeletingLastPathComponent] copy];
    NSError *errorw;
    NSRange range = [path rangeOfString:@"__MACOSX"];
    if (range.location == NSNotFound) {
        NSLog(@"last: %@", [path lastPathComponent]);
        if ([fileMgr createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:&errorw]) {
            NSLog(@"Create Folder: %@", path);
            NSLog(@"Directory Win: %@", errorw);
            if (![[pathfull pathExtension] isEqualToString:@""] && ![[[pathfull lastPathComponent] substringToIndex:1] isEqualToString:@"." ]) {
                [data writeToFile:pathfull atomically:NO];
            }
        }
        else {
            //NSLog(@"Create Folder: %@", path);
            NSLog(@"Directroy Fail: %@", errorw);
        }
    }
}

[unzipFile close];

//delete zip
// For error information
NSError *error;

if ([fileMgr removeItemAtPath:[applicationDocumentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip",@"Mid America Oireachtas 2011"]] error:&error] == YES) {
    NSLog(@"File Deleted");
}

//delete zip
// For error information
NSError *error;

if ([fileMgr removeItemAtPath:[applicationDocumentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip",@"My Zip"]] error:&error] == YES) {
    NSLog(@"File Deleted");
}

这里是日志文件输出的相关sn-p：

    2012-01-04 17:12:51.509 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/
    2012-01-04 17:12:51.510 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.510 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents/Mid America Oireachtas 2011
    2012-01-04 17:12:51.510 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.510 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents
    2012-01-04 17:12:51.510 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.511 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents/__MACOSX
    2012-01-04 17:12:51.511 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.511 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents/__MACOSX/Mid America Oireachtas 2011
    2012-01-04 17:12:51.511 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.511 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents/Mid America Oireachtas 2011
    2012-01-04 17:12:51.512 WhatsMyStageOn[3232:15503] Directory Win: (null)
    2012-01-04 17:12:51.544 WhatsMyStageOn[3232:15503] Create Folder: /Users/Brandon/Library/Application Support/iPhone Simulator/5.0/Applications/436C2C49-D79B-4CDA-B0AA-15BB98F6F75E/WhatsMyStageOn.app/Documents/Mid America Oireachtas 2011/Attractions
    2012-01-04 17:12:51.544 WhatsMyStageOn[3232:15503] Directory Win: (null)

阅读 NSFileManager 文档，这是应该在日志中输出的内容，但是，没有创建文件夹。

编辑：修复了不使用文档的问题，仍然存在与编辑前相同的问题。

编辑：将代码更新为工作解决方案！

Answer 1

您不应该写入应用程序包本身。试试这个：

NSString *appSupportFolder = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *path = [appSupportFolder stringByAppendingPathComponent:info.name];

Answer 2

我认为您无法直接在 WhatsMyStageOn.app/ 中创建目录，请尝试在您的 Documents 目录中创建它们。

NSMutableString *path = [info.name mutableCopy];
path = [[path stringByDeletingLastPathComponent] mutableCopy];
path = [NSMutableString  stringWithFormat:@"%@/%@", applicationDocumentsDir, path];

您在底部有一行删除了 Documents 中正确的文件路径，但您的原始路径变量指向 bundle 目录，而不是 Documents 目录。