Managing Files and Directories: NSFileManager

refer to  Addison Wesley - Programming.in.ObjectiveC.2.0.2nd (2009)

#import <Foundation/NSObject.h>
#import <Foundation/NSString.h>
#import <Foundation/NSFileManager.h>
#import <Foundation/NSAutoreleasePool.h>
#import <Foundation/NSDictionary.h>
int main (int argc, char *argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSString          *fName = @ ” testfile ” ;
NSFileManager     *fm;
NSDictionary      *attr;

// Need to create an instance of the file manager

fm = [NSFileManager defaultManager];

// Let ’ s make sure our test file exists first

if ([fm fileExistsAtPath: fName] == NO) {
   NSLog (@ ” File doesn ’ t exist! ” );
   return 1;
}

// Now let ’ s make a copy

if ([fm copyPath: fName toPath: @ ” newfile ” handler: nil] == NO) {
   NSLog (@ ” File copy failed! ” );
   return 2;
}
// Let ’ s test to see if the two files are identical
if ([fm contentsEqualAtPath: fName andPath: @ ” newfile ” ] == NO) {
   NSLog (@ ” Files are not equal! ” );
   return 3;
}

// Now let ’ s rename the copy

if ([fm movePath: @ ” newfile ” toPath: @ ” newfile2 ” handler: nil] == NO) {
   NSLog (@ ” File rename failed! ” );
   return 4;
}

// Get the size of newfile2

if ((attr = [fm fileAttributesAtPath: @ ” newfile2 ” traverseLink: NO]) == nil) {
   NSLog (@ ” Couldn ’ t get file attributes! ” );
   return 5;
}
NSLog (@ ” File size is %i bytes ” , [[attr objectForKey: NSFileSize] intValue]);

// And finally, let ’ s delete the original file
if ([fm removeFileAtPath: fName handler: nil] == NO) {
   NSLog (@ ” File removal failed! ” );
   return 6;
}

NSLog (@ ” All operations were successful! ” );

// Display the contents of the newly-created file

NSLog(@ ” %@ ” [NSString stringWithContentsOfFile: @ ” newfile2 ” ]);

[pool drain];
return 0;
｝

File size is 84 bytes
All operations were successful!
This is a test file with some data in it.
Here ’ s another line of data.
And a third.