File Handling - Objective C

File handling is made available with the help of class NSFIleManager.

Methods used in File Handling 

The list of the methods used accessing and manipulating files is listed below. Here, we have to replace the FilePath1, FIlePath2 and FIlePath string to our required full file paths to get the desired action.

Check if file exists at a path

NSFileManager *fileManager = [NSFIleManger defaultManager];

NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES];
NSString *documentDirectoryPath = [directoryPaths objectAtIndex : 0];
if( [ fileManager fileExistsAtPath : @""] ==YES)
{
     NSLog(@"File Exists");
}

Comparing two file contents

if ([fileManager contentsEqualAtPath :@"FilePath1" andPath : @" FilePath2" ])
{
        NSLog(@"Same content");
}

Check if writable, readable and executable

if( [fileManger isWritableFileAtPath : @"FilePath"] )
{
     NSLog(@"isWritable");
}

if( [fileManger isReadableFileAtPath : @"FilePath"] )
{
     NSLog(@"isReadable");
}

if( [fileManger isExecutableFileAtPath : @"FilePath"] )
{
     NSLog(@"isExecutable");
}

Move File

if( [fileManger moveItemAtPath : @"FilePath" toPath : @"FIlePath2" error :NULL] )
{
     NSLog(@"Moved Successfully");
}

Copy File

if( [fileManger copyItemAtPath : @"FilePath" toPath : @"FIlePath2" error :NULL] )
{
     NSLog(@"Copied successfully");
}

Remove File

if( [fileManger removeItemAtPath : @"FilePath" error :NULL] )
{
     NSLog(@"Removed successfully");
}

Read File

     NSData *data = [fileManager contentsAtPath :@"Path"];

Write file

    [fileManager createFileAtPath :@"" contents : data attributes :nil];

We have successfully learnt on the various file access and manipulation techniques and it's now your time to do various operations on the files and know the usage of files.