How to check the data exists in NSDocumentDirectory

Question

I click the button and check if the (.png) or another data is exists in NSDocumentDirectory. if exists push the view controller or not.

I tried this,

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"u0-1b.png"];

if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main_iPad" bundle:nil];

    UIViewController *controller = (UIViewController *)[storyboard instantiateViewControllerWithIdentifier:@"SavedViewController"];

    [self.navigationController pushViewController:controller animated:YES];
}
else
    NSLog(@"file doesnt exist");

Here I given the full image name (u1-1b.png) it's woking but I want to check the data or extension (.png, or ).

possible duplicate http://stackoverflow.com/questions/9245123/get-the-extension-of-a-file-contained-in-an-nsstring — Basheer_CAD, Feb 21 '14 at 09:31
it is not a duplicate. you given the link is different question — user3069029, Feb 21 '14 at 09:32
it is possible to check in that folder using extension instead of given full name (filename.png) — user3069029, Feb 21 '14 at 09:36
You mean u need to search if a ".png" file is present or not ? If YES Check this - http://stackoverflow.com/questions/499673/getting-a-list-of-files-in-a-directory-with-a-glob — nswamy, Feb 21 '14 at 09:38
just i want to know png file exists push view controller or not…. See my above code — user3069029, Feb 21 '14 at 09:38

score 3 · Accepted Answer · answered Feb 21 '14 at 09:37

You can manage it by using following code

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *filePathsArray = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:documentsDirectory  error:nil];
NSLog(@"files array %@", filePathsArray);

if(filePathsArray.count > 0)
{
     // data is exist;
}
else
{
  // data does not exist;
}

You can get the path for each object in filePathsArray by using the below code

for (int i = 0 ; i < filePathsArray.count; i++)
{
   NSString *filePath = [documentsDirectory stringByAppendingPathComponent:[filePathsArray objectAtIndex:i]];
}

If you want to get extension of any file then @Basheer_CAD's Like is helpful for you.

Basheer_CAD · Answer 2 · 2014-02-21T09:46:17.977

This method return to you all the files paths and extensions in NSDictionary in your document dir, make use of it. The directory parameter, is used if you want to search for subfolders, example: if you have files in folder mmm pass @"/mmm", otherwise pass nil

 - (NSDictionary*)listOfFilesAtDirectory:(NSString*)directory
    {
        NSMutableDictionary *filesAtDirectory = [[NSMutableDictionary alloc] init];
        NSString *documentsDir = [self documentsDirectory];
        NSString *givenDirectory = [documentsDir stringByAppendingString:directory];
        NSError *searchErr = nil;

        NSArray *arrFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:givenDirectory
                                                                                error:&searchErr];
        if(!searchErr)
        {
            for(NSString *strFileNameAndExtension in arrFiles)
            {
                NSString *strFilePath = [givenDirectory stringByAppendingPathComponent:strFileNameAndExtension];
                [filesAtDirectory setObject:strFileNameAndExtension forKey:strFilePath];
            }
        }
        else
        {
            NSLog(@"Error reading files in this directory: %@, \n Error description:%@", directory, searchErr.description);
        }

        return filesAtDirectory;
    }

Just in case this is documentsDirectory method

- (NSString*)documentsDirectory
{
    NSString *strRootPath  = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    return strRootPath;
}

How to check the data exists in NSDocumentDirectory

2 Answers2