Delete empty folders in iOS? - objective-c

Question

I have plenty of empty temporary folders in app's Document folder.
How to delete them all?
I tried:
NSArray *folders = [[NSFileManager defaultManager]contentsOfDirectoryAtURL:[self applicationDocumentsDirectory] includingPropertiesForKeys:[NSArray arrayWithObject:#"NSURLIsDirectoryKey"] options:0 error:nil];
if (folders) {
for (NSURL *url in folders) {
[[NSFileManager defaultManager]removeItemAtURL:url error:nil];
}
}
but it deletes all, not only folders

Answer 1

This snippet of code deletes only directiories that are empty.
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *file in files) {
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:file];
NSError *error;
if ([[fileManager contentsOfDirectoryAtPath:fullPath error:&error] count]==0) {
// check if number of files == 0 ==> empty directory
if (!error) {
// check if error set (fullPath is not a directory and we should leave it alone)
[fileManager removeItemAtPath:fullPath error:nil];
}
}
}
If you simply want to delete all directories (both empty and not empty) the snippet can be simplified into this:
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *file in files) {
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:file];
if ([fileManager contentsOfDirectoryAtPath:fullPath error:nil])
[fileManager removeItemAtPath:fullPath error:nil];
}