如何使用带有文件路径的 NSArray 获取 NSDictionary？
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【中文标题】如何使用带有文件路径的 NSArray 获取 NSDictionary？【英文标题】：How to get a NSDictionary with NSArray with file paths? 【发布时间】：2013-12-07 17:36:23 【问题描述】：我有一个如下所示的 NSArray：
@[@"file1", @"directory/testfile", @"directory/otherdir/testfile", @"otherdir/", @"otherdir/otherfile"]
我正在尝试将其转换为如下所示的 NSDictionary：
@
@"directory/":@
@"otherdir/":@
@"testfile":[..some array with data..]
,
@"testfile":[..some array with data..]
,
@"otherdir/":@
@"otherfile":[..some array with data..]
,
@"file1":[..some array with data..]
基本上，一个看起来像文件树的 NSDictionary。提前致谢！
编辑：我拥有的实际数组是这样的：
(
"blog/",
"blog/code.css",
"blog/style.css",
"etc/",
"etc/awsservices.png",
"etc/speeds.png",
"etc/test/",
"etc/test/other/",
"etc/test/other/speeds.png",
"site/",
"site/dino.png",
"site/error.css",
"site/main.css",
"site/signet.min.js"
)
以及我为此编写的代码：
-(NSDictionary*)buildDictionaryWithContentsOfPath:(NSMutableArray*)files
NSString *subDir;
NSMutableDictionary *returnable = [[NSMutableDictionary alloc] initWithDictionary:@];
BOOL directory;
NSLog(@"%@", files);
for (S3ObjectSummary *objectSummary in files)
if ([[objectSummary key] hasSuffix:@"/"])
if (subDir && [[objectSummary key] hasPrefix:subDir])
NSLog(@"prefixed %@", [objectSummary key]);
NSMutableDictionary *treeDict = [[NSMutableDictionary alloc] initWithDictionary:@];
[returnable[subDir] setObject:treeDict forKey:[objectSummary key]];
else
subDir = [objectSummary key];
NSLog(@"dir %@", [objectSummary key]);
NSMutableDictionary *treeDict = [[NSMutableDictionary alloc] initWithDictionary:@];
[returnable setObject:treeDict forKey:[objectSummary key]];
directory = true;
else
S3GetObjectMetadataRequest *getMetadataRequest = [[S3GetObjectMetadataRequest alloc] initWithKey:[objectSummary key] withBucket:self.bucket.name];
S3GetObjectMetadataResponse *getMetadataResponse = [self.client getObjectMetadata:getMetadataRequest];
if (![[objectSummary key] hasPrefix:subDir])
NSLog(@"file %@",[objectSummary key]);
[returnable setObject:@@"filename":[objectSummary key], @"directory":@(directory), @"created_at":getMetadataResponse.lastModified forKey:[objectSummary key]];
else
for (NSString __strong *pathComp in [[objectSummary key] pathComponents])
pathComp = [NSString stringWithFormat:@"%@/", pathComp];
NSLog(@"path component %@", pathComp);
if (![[objectSummary key] hasSuffix:@"/"])
if (returnable[pathComp])
NSLog(@"has comp %@", pathComp);
[returnable[pathComp] setObject:@@"filename":[objectSummary key], @"directory":@(directory), @"created_at":getMetadataResponse.lastModified forKey:[objectSummary key]];
directory = false;
//[self.fileTree addObject:@@"filename":[objectSummary key], @"directory":@(directory), @"created_at":getMetadataResponse.lastModified];
return returnable;
以及它返回的字典：
"blog/" =
"blog/code.css" =
"created_at" = "2013-12-07 12:13:37 +0000";
directory = 0;
filename = "blog/code.css";
;
"blog/style.css" =
"created_at" = "2013-12-07 12:13:36 +0000";
directory = 0;
filename = "blog/style.css";
;
;
"etc/" =
"etc/awsservices.png" =
"created_at" = "2013-12-07 12:26:37 +0000";
directory = 0;
filename = "etc/awsservices.png";
;
"etc/speeds.png" =
"created_at" = "2013-12-07 13:29:27 +0000";
directory = 0;
filename = "etc/speeds.png";
;
// PROBLEM HERE
"etc/test/" =
;
"etc/test/other/" =
;
"etc/test/other/speeds.png" =
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
;
// PROBLEM HERE
;
"site/" =
"site/dino.png" =
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/dino.png";
;
"site/error.css" =
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/error.css";
;
"site/main.css" =
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/main.css";
;
"site/signet.min.js" =
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/signet.min.js";
;
;
如你所见，这部分：
"etc/test/" =
;
"etc/test/other/" =
;
"etc/test/other/speeds.png" =
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
;
应该是这样的：
"etc/" =
"test/" =
"other/" =
"speeds.png" =
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
;
;
;
;
【问题讨论】：
我很难看到NSArray 示例和NSDictionary 示例之间的关系...
@nhgrif 好吧，我制作的字典是我试图获取数组的字典。它在技术上是伪代码。 NSArray 内容是文件夹和文件的文件名。
发布您迄今为止为进行转换所做的尝试。
“some array with data”的数组中究竟是什么？
查看更新后的帖子
【参考方案1】：
如果我正确理解您的问题，这种方法应该会有所帮助：
// Add the path to the tree. Returns the "node" for this path.
-(NSMutableDictionary *)addFile:(NSString *)path toTree:(NSMutableDictionary *)tree
NSMutableDictionary *node = tree;
// Split path into components:
NSArray *components = [path componentsSeparatedByString:@"/"];
// Create all intermediate dictionaries:
for (NSUInteger i = 0; i < [components count] - 1; i++)
NSString *key = [components[i] stringByAppendingString:@"/"];
if (node[key] == nil)
node[key] = [NSMutableDictionary dictionary];
node = node[key];
// Process last component, which is the file name,
// or "" in the case of a dictionary:
NSString *name = [components lastObject];
if ([name length] > 0)
node[name] = [NSMutableDictionary dictionary];
node = node[name];
return node;
如果你这样使用它：
NSArray *files = ...; // Your array of files
NSMutableDictionary *tree = [NSMutableDictionary dictionary];
for (NSString *path in files)
NSMutableDictionary *node = [self addFile:path toTree:tree];
BOOL isDir = [path hasSuffix:@"/"];
if (!isDir)
node[@"filename"] = path;
结果字典是
“博客/” = “代码.css” = 文件名=“博客/code.css”； ; “样式.css” = 文件名 = "博客/style.css"; ; ; “等/” = “awsservices.png”= 文件名 = "etc/awsservices.png"; ; “速度.png”= 文件名 = "etc/speeds.png"; ; “测试/” = “其他/” = “速度.png”= 文件名 = "etc/test/other/speeds.png"; ; ; ; ; “网站/” = “恐龙.png” = 文件名 = "网站/dino.png"; ; “错误.css” = 文件名=“站点/error.css”； ; “main.css” = 文件名=“站点/main.css”； ; "signet.min.js" = 文件名=“站点/signet.min.js”； ; ;【讨论】：
太棒了，非常感谢，这几天我一直在努力解决这个问题:)以上是关于如何使用带有文件路径的 NSArray 获取 NSDictionary？的主要内容，如果未能解决你的问题，请参考以下文章
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