Objective-c recursion, advanced recursive method construction - objective-c

Question

I want to mimic NSDirectoryEnumerator with a simple recursive function, but my attempts so far have had my loops stopping prematurely.
The method needs to stop when there is no longer a directory or file present at an nth level.
How can I rearrange the method below to be a simple recursive function that will terminate accordingly?
Any help would be much appreciated. Thanks.
#import "MenuFromPathData.h"
#interface MenuFromPathData ()
#property (nonatomic,strong) NSFileManager *myFileManager;
#end
#implementation MenuFromPathData
#synthesize myFileManager=_myFileManager;
#define ROOT_DIRECTORY #"TextData"
//
////
//
- (void) simpleMenuArrayBuilder
{
NSArray *fileNamesLevel1 = [self fullArrayReturn:ROOT_DIRECTORY];
for(int i = 0; i < [fileNamesLevel1 count]; i++)
{
NSString *pathNameLevel2 = [NSString stringWithFormat:#"%#/%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i]];
NSArray *fileNamesLevel2 = [self fullArrayReturn:pathNameLevel2];
for(int j = 0; j < [fileNamesLevel2 count]; j++)
{
NSString *pathNameLevel3 = [NSString stringWithFormat:#"%#/%#/%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i],[fileNamesLevel2 objectAtIndex:j] ];
NSArray *fileNamesLevel3 = [self fullArrayReturn:pathNameLevel3];
for(int k = 0; k < [fileNamesLevel3 count]; k++)
{
NSString *pathNameLevel4 = [NSString stringWithFormat:#"%#/%#/%#/%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i],[fileNamesLevel2 objectAtIndex:j],[fileNamesLevel3 objectAtIndex:k] ];
NSArray *fileNamesLevel4 = [self fullArrayReturn:pathNameLevel4];
for(int l = 0; l < [fileNamesLevel4 count]; l++)
{
NSString *pathNameLevel5 = [NSString stringWithFormat:#"%#/%#/%#/%#/%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i],[fileNamesLevel2 objectAtIndex:j],[fileNamesLevel3 objectAtIndex:k],[fileNamesLevel4 objectAtIndex:l] ];
NSArray *fileNamesLevel5 = [self fullArrayReturn:pathNameLevel5];
for(int m = 0; m < [fileNamesLevel5 count]; m++)
{
NSString *pathNameLevel6 = [NSString stringWithFormat:#"%#/%#/%#/%#/%#/%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i],[fileNamesLevel2 objectAtIndex:j],[fileNamesLevel3 objectAtIndex:k],[fileNamesLevel4 objectAtIndex:l], [fileNamesLevel5 objectAtIndex:m] ];
NSArray *fileNamesLevel6 = [self fullArrayReturn:pathNameLevel6];
NSLog(#"-- LVL 6.0 %# -- ",pathNameLevel6);
for(int n = 0; n < [fileNamesLevel6 count]; n++)
{
NSString *pathNameLevel7 = [NSString stringWithFormat:#"%#/%#/%#/%#/%#/%#%#",ROOT_DIRECTORY,[fileNamesLevel1 objectAtIndex:i],[fileNamesLevel2 objectAtIndex:j],[fileNamesLevel3 objectAtIndex:k],[fileNamesLevel4 objectAtIndex:l], [fileNamesLevel5 objectAtIndex:m],[fileNamesLevel6 objectAtIndex:n] ];
NSArray *fileNamesLevel7 = [self fullArrayReturn:pathNameLevel7];
NSLog(#"-- LVL 7.0 %# -- ",pathNameLevel7);
}
}
}
}
}
}
}
//
////
//
- (NSString*) resourcePath : (NSString*) pathName {
return [[NSBundle mainBundle] pathForResource:pathName ofType:nil];
}
- (NSArray*) bundleArrayReturn : (NSString*)pathForResource {
NSError* error;
return [self.myFileManager contentsOfDirectoryAtPath:pathForResource error:&error];
}
- (NSArray*) fullArrayReturn : (NSString*) pathName {
return [self bundleArrayReturn:[self resourcePath: pathName]];
}
//
////
//
- (NSFileManager*) myFileManager {
if(!_myFileManager) {
_myFileManager = [NSFileManager defaultManager];
}
return _myFileManager;
}
#end

Answer 1

Something like this should work. Only trick is to add another parameter to your method to track current depth during the recursion.
- (void) simpleMenuArrayBuilderForPath:(NSString*)pathToDecend allowedDepth:(int)depth
{
// if we've defended far enough, then stop
if(depth == 0) return;
// otherwise, get the next directory listing at this level
NSArray *fileNamesNextLevel = [self fullArrayReturn:pathToDecend];
for(int i = 0; i < [fileNamesNextLevel count]; i++)
{
// find each path inside the directory we're looking at
NSString *nextLevelPathName = [pathToDecend stringByAppendingPathComponent:[fileNamesNextLevel objectAtIndex:i]];
// process it however you want...
NSLog(#"Looking at %#", nextLevelPathName);
// and recur into it
[self simpleMenuArrayBuilderForPath:nextLevelPathName allowedDepth:depth-1];
}
}
then, call it by:
[self simpleMenuArrayBuilderForPath:ROOT_DIRECTORY allowedDepth:5];