Question

When I changed the current directory path of main.m to newDir why does it still say that there are no files in newDir? Also I ran this program multiple times with no errors. Does that mean I ended up creating multiple newDir?

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{

    @autoreleasepool {
        NSString *newDir = @"newDir";
        NSFileManager *manager = [NSFileManager defaultManager];

        if ([manager createDirectoryAtPath:newDir withIntermediateDirectories:YES attributes:nil error:NULL] == NO) {
            NSLog(@"couldnt create new directory");
            return 1;
        }

        if ([manager changeCurrentDirectoryPath: newDir] == NO) {
            NSLog(@"couldnt change directory path");
            return 2;
        }

        NSLog(@"%@", [manager currentDirectoryPath]);
        NSLog(@"%@", [manager contentsOfDirectoryAtPath:newDir error:NULL]);
    }
    return 0;
}

Output:

2012-08-07 10:27:20.428 Test[853:707] /Users/ss/Library/Developer/Xcode/DerivedData/Test-bfrqtnrhaafmdzghoyirjnfqjbfc/Build/Products/Debug/newDir
2012-08-07 10:36:47.832 Test[885:707] (null)

Answer 1

The path to main.m does not play into what happens when you run your program: the only question is whether the directory has any files or not, and from the log it appears that it doesn’t.

To create some files in the directory, run these commands in the terminal window:

touch /Users/ss/Library/Developer/Xcode/DerivedData/Test-bfrqtnrhaafmdzghoyirjnfqjbfc/Build/Products/Debug/newDir/quick.txt
touch /Users/ss/Library/Developer/Xcode/DerivedData/Test-bfrqtnrhaafmdzghoyirjnfqjbfc/Build/Products/Debug/newDir/brown.txt
touch /Users/ss/Library/Developer/Xcode/DerivedData/Test-bfrqtnrhaafmdzghoyirjnfqjbfc/Build/Products/Debug/newDir/fox.txt

This will create three empty files. Now run your program, and see if it discovers the newly created txt files; it should.

On your second question, the operating system would not let you create multiple file system objects with identical names, so the answer is no, you created only one newDir.