How can I save each time a new data to my plist file rather than replace the old one?
===

I read from plist file and add data to tableview

My plist:

    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <array>
        <dict>
            <key>Title</key>
            <string>Section1</string>
            <key>Rows</key>
            <array>
                <string>Section1 Item1</string>
                <string>Section1 Item2</string>
            </array>
        </dict>
        <dict>
            <key>Title</key>
            <string>Section2</string>
            <key>Rows</key>
            <array>
                <string>Section2 Item1</string>
                <string>Section2 Item2</string>
            </array>
        </dict>
    </array>
    </plist>
    

.h
    
    
    #import "RootViewController.h"
    
    @interface RootViewController ()
    
    @property (copy, nonatomic) NSArray* tableData;
    
    @end
    
    
.m

    @implementation RootViewController
    
    @synthesize tableData;
    
    - (void) dealloc
    {
        self.tableData = nil;
        [super dealloc];
    }
    
    - (void) viewDidLoad
    {
        [super viewDidLoad];
        self.tableData = [NSArray arrayWithContentsOfFile: [[NSBundle mainBundle] pathForResource: @"Table" ofType: @"plist"]];
    }
    
    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView;
    {
        return [tableData count];
    }
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
    {
        return [[[tableData objectAtIndex: section] objectForKey: @"Rows"] count];
    }
    
    - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section;
    {
        return [[tableData objectAtIndex: section] objectForKey: @"Title"];
    }
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
    {
        static NSString *CellIdentifier = @"Cell";
    
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        }
    
        cell.textLabel.text = [[[tableData objectAtIndex: indexPath.section] objectForKey: @"Rows"] objectAtIndex: indexPath.row];
    
        return cell;
    }
    
    @end


**How can I write to that strings and arrays each time a new data rather than replace the old one?**