CODEWITHSUNDEEP
objective-cmacosfilefilesystemsnsfilemanager
Dima Deplov
Dima Deplov

Reputation: 3718

Mac OS: how to determine path is file or directory

I have a path and I want to know, is this directory or a file. Pretty simple, but I have a problem. Here's my path: 

NSString *file = @"file://localhost/Users/myUser/myFolder/TestFolder/";

or

NSString *file = @"file://localhost/Users/myUser/myFolder/my_test_file.png";

Here is my code:

BOOL isDir;


// the original code from apple documentation: 
// if ([fileManager fileExistsAtPath:file isDirectory:&isDir] && isDir)
// but even my if returns me "not ok" in log

if([[NSFileManager defaultManager] fileExistsAtPath:file isDirectory:&isDir])
{

     NSLog(@"directory");
}
else
{
     NSLog(@"not ok");
}

files and dirs on this pathes are exists and they are ok. But I thinks problem could be in it. But I don't know why. Help me with this please.

By the way, I get path from another method:

   NSArray *contentOfMyFolder = [[NSFileManager defaultManager]
                contentsOfDirectoryAtURL:urlFromBookmark
              includingPropertiesForKeys:@[NSURLContentModificationDateKey, NSURLLocalizedNameKey]
                                 options:NSDirectoryEnumerationSkipsHiddenFiles
                                   error:nil];

after this in for loop, I get items that stored in array contentOfMyFolder and get path like this:

 for (id item in contentOfMyFolder) {
     NSString *path = [item absoluteString]; 
 }

I thinks this is perfectly valid path for method fileExistsAtPath:(NSString *)path isDirectory:(BOOL)isDir

Where the problem could hide?!

Upvotes: 3

Views: 3040

Answers (1)

Martin R
Martin R

Reputation: 539685

The problem is here:

NSString *path = [item absoluteString];

because that creates a string representation of the URL, such as

file://localhost/Users/myUser/myFolder/TestFolder/

and that is not what fileExistsAtPath: expects. What you need is the path method to convert the URL to a path:

for (NSURL *item in contentOfMyFolder) {
    NSString *path = [item path];
    BOOL isDir;
    if ([[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&isDir]) {
        if (isDir) {
            NSLog(@"%@ is a directory", path);
        } else {
            NSLog(@"%@ is a file", path);
        }
    } else {
        NSLog(@"Oops, %@ does not exist?", path);
    }
}

Alternatively, you can ask the URL for its "directory property":

for (NSURL *item in contentOfMyFolder) {
    NSNumber *isDir;
    NSError *error;
    if ([item getResourceValue:&isDir forKey:NSURLIsDirectoryKey error:&error]) {
        if ([isDir boolValue]) {
            NSLog(@"%@ is a directory", item);
        } else {
            NSLog(@"%@ is a file", item);
        }
    } else {
        NSLog(@"error: %@", error);
    }
}

Upvotes: 6

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