Question

Has someone work with this method of NSFileManager ?

- (BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory;

How can I use this method to check a folder is existing or not ?

Answer 1

Use NSFileManager‘s fileExistsAtPath:isDirectory: method. See Apple’s docs here.

or based on your example you could use the following as well

Take a look in the documentation for this method signature:

- (BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory

You need a pointer to a BOOL var as argument, not a BOOL itself. NSFileManager will record if the file is a directory or not in that variable. For example:

BOOL isDir;
BOOL exists = [fm fileExistsAtPath:path isDirectory:&isDir];
if (exists) {
    /* file exists */
    if (isDir) {
        /* file is a directory */
    }
 }

Also
Start by understanding Low-Level File Management Programming Topics

1) NSFileManager currentDirectoryPath

3) NSFileManager fileExistsAtPath:isDirectory: