Use this if you wonna to save .plist to Document directory and then wonna to edit this file

PlistReader.m

/*

Then just to use somehow like this (if array)
NSMutableArray *parsedPlist = [[NSMutableArray alloc] initWithContentsOfFile:[PlistReader copyFileToDocumentDirectory:%"filename.plist"]];

*/

+ (NSString *)copyFileToDocumentDirectory:(NSString *)fileName
{
    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                         NSUserDomainMask,
                                                         YES);
    NSString *documentsDir = [paths objectAtIndex:0];
    NSString *documentDirPath = [documentsDir
                                 stringByAppendingPathComponent:fileName];
    
    NSArray *file = [fileName componentsSeparatedByString:@"."];
    NSString *filePath = [[NSBundle mainBundle]
                          pathForResource:[file objectAtIndex:0]
                          ofType:[file lastObject]];
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL success = [fileManager fileExistsAtPath:documentDirPath];
    
    if (!success) {
        success = [fileManager copyItemAtPath:filePath
                                       toPath:documentDirPath
                                        error:&error];
        if (!success) {
            NSAssert1(0, @"Failed to create writable txt file file with message \
                      '%@'.", [error localizedDescription]);
        }
    }
    
    return documentDirPath;
}