如何获取包含音乐（mp3）在Cocoa中的所有文件夹路径？ [英] How to get all folders paths that contains music (mp3) in Cocoa?
问题描述
我是Coco的新用户。我在我的应用程序中尝试扫描计算机上的音乐文件夹。但我有一些逻辑。
我需要从/ Users开始扫描，例如，如果我有/ Users / music / anotherMusic和/ Users / music / music2 / music3，我需要能够只获得文件夹的顶部包含音乐（/用户/音乐）。并且还需要继续在子文件夹中迭代以在根文件夹（/ Users / music）中计算音乐文件。同样的逻辑继续扫描整个计算机。结果应该显示在表中，例如 RESULTS 应该像这样
strong> - - / Users / myComputer / iTunes - 77个文件夹，500个音乐文件
- / Users / myComputer / Documents / Music -15音乐文件夹，400个音乐文件夹
- / Users / myComputer / Downloads / b个文件（包含音乐的所有子目录的计数）
我该怎么办？我做了什么，它在下面的代码。但是它一路走下来，给我每个路径包含.mp3音乐，但我需要逻辑如上所述。
NSFileManager * manager = [NSFileManager defaultManager];
NSDirectoryEnumerator * direnum = [manager enumeratorAtPath：@/ Users /];
NSString * file;
while（（file = [direnum nextObject]））
{
NSString * FullPath = [NSString stringWithFormat：@/ Users /％@，file];
if（[file hasSuffix：@。mp3]）
{
///给出包含mp3的音乐文件路径，或者我可以剪切最后一部分，获取文件夹路径。但没有逻辑应该是。
}
}
任何想法或帮助赞赏。谢谢。
如果我错了，请纠正我。你想得到你的文件夹中的mp3数，但是一个文件夹只包含文件夹和mp3文件，mp3计数是其父文件夹（如果父本身只包含文件夹和mp3，它计数为其grand-父对象等等）对吗？
[manager enumeratorAtPath]是非常有用的，但在这种情况下，它肯定需要你维护一个堆栈来跟踪你浏览的文件。
- （BOOL） isMp3File：（NSString *）file
{
return [file hasSuffix：@。mp3];
}
- （BOOL）isHiddenFile：（NSString *）file
{
return [file hasPrefix：@。];
}
- （void）parseForMp3：（NSMutableDictionary *）dic
inPath：（NSString *）currentPath
forFolder：（NSString *）文件夹
{
BOOL comboBreak = false;
NSFileManager * fileManager = [NSFileManager defaultManager];
NSError * error;
NSArray * files = [fileManager contentOfDirectoryAtPath：currentPath error：& error];
if（错误）
{
//抛出错误或任何
}
（文件中的NSString *文件）
{
BOOL isDirectory = false;
NSString * fullPath = [NSString stringWithFormat：@％@ /％@，currentPath，file];
[fileManager fileExistsAtPath：fullPath isDirectory：& isDirectory];
comboBreak = comboBreak || （！isDirectory&&
！[self isMp3File：file]&&
！[self isHiddenFile：file]）;
if（comboBreak）
break;
}
for（NSString * file in files）
{
BOOL isDirectory = false;
NSString * fullPath = [NSString stringWithFormat：@％@ /％@，currentPath，file];
[fileManager fileExistsAtPath：fullPath isDirectory：& isDirectory];
if（isDirectory）
{
if（！comboBreak）
{
[self parseForMp3：dic inPath：fullPath forFolder：folder];
}
else
{
[self parseForMp3：dic inPath：fullPath forFolder：fullPath];
}
}
else if（[self isMp3File：file]）
{
NSNumber * oldValue = [dic valueForKey：folder];
oldValue = [NSNumber numberWithUnsignedInteger：[oldValue unsignedIntegerValue] + 1];
[dic setValue：oldValue forKey：folder];
}
}
}
- （void）applicationDidFinishLaunching：（NSNotification *）aNotification
{
// Insert代码在这里初始化你的应用程序
NSMutableDictionary * dic = [NSMutableDictionary dictionary];
[self parseForMp3：dic inPath：@/ Users / panosbaroudjianforFolder：@/ Users / panosbaroudjian];
NSLog（@％@，dic）;
}
I'm new in Cocoa.I'm trying to scan computer for music folders,within my application. But I have some logic for it. What I need to start scaning from /Users , for example if I have /Users/music/anotherMusic and /Users/music/music2/music3 , I need to be able to get only the top for that folders that contains music (/Users/music ). And also need to continue iterate in subfolders to have a count of music files in the root folder (/Users/music). And so on with the same logic continue scanning whole computer.And results should be displayed in table, for example RESULTS should be like this
- -/Users/myComputer/iTunes - 77 folders, 500 music files
- /Users/myComputer/Documents/Music -15 music folders,400 music files
- /Users/myComputer/Downloads/Media -20 music folders, 325 music
files (count of all subdirectories with music)
How I can do it? What I did ,it is in the code below. But it's going deep all the way down, and give me each path that contains .mp3 music, but I need logic as mentioned above.
NSFileManager *manager = [NSFileManager defaultManager];
NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:@"/Users/"];
NSString * file;
while((file=[direnum nextObject]))
{
NSString * FullPath=[NSString stringWithFormat:@"/Users/%@",file];
if ([file hasSuffix:@".mp3"])
{
///gives a music file path that contains mp3, or I can cut last part, and get the folder path. But no logic as should be.
}
}
Any ideas, or help appreciated. Thanks.
Correct me if I am wrong. You want to get the number of mp3 in your folder, but while a folder only contains folders and mp3 files, the mp3-count is for its parent folder (and if the parent itself only contains folders and mp3s, it counts for its grand-parent, etc.) right ?
[manager enumeratorAtPath] is quite useful, but in this case it will certainly require you to maintain a stack to keep track of your browsed files.
Recursion is bliss, here.
- (BOOL)isMp3File:(NSString*)file
{
return [file hasSuffix:@".mp3"];
}
- (BOOL)isHiddenFile:(NSString*)file
{
return [file hasPrefix:@"."];
}
- (void)parseForMp3:(NSMutableDictionary*)dic
inPath:(NSString*)currentPath
forFolder:(NSString*)folder
{
BOOL comboBreak = false;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError* error;
NSArray* files = [fileManager contentsOfDirectoryAtPath:currentPath error:&error];
if (error)
{
//throw error or anything
}
for (NSString *file in files)
{
BOOL isDirectory = false;
NSString *fullPath = [NSString stringWithFormat:@"%@/%@", currentPath, file];
[fileManager fileExistsAtPath:fullPath isDirectory:&isDirectory];
comboBreak = comboBreak || (!isDirectory &&
![self isMp3File:file] &&
![self isHiddenFile:file]);
if (comboBreak)
break;
}
for (NSString *file in files)
{
BOOL isDirectory = false;
NSString *fullPath = [NSString stringWithFormat:@"%@/%@", currentPath, file];
[fileManager fileExistsAtPath:fullPath isDirectory:&isDirectory];
if (isDirectory)
{
if (!comboBreak)
{
[self parseForMp3:dic inPath:fullPath forFolder:folder];
}
else
{
[self parseForMp3:dic inPath:fullPath forFolder:fullPath];
}
}
else if ([self isMp3File:file])
{
NSNumber *oldValue = [dic valueForKey:folder];
oldValue = [NSNumber numberWithUnsignedInteger:[oldValue unsignedIntegerValue] + 1];
[dic setValue:oldValue forKey:folder];
}
}
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[self parseForMp3:dic inPath:@"/Users/panosbaroudjian" forFolder:@"/Users/panosbaroudjian"];
NSLog(@"%@", dic);
}
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