Unable to set ViewController's title in Delegate method

I have implemented an optionTable with stores a list of options for my app to execute

I have defined a protocol method within the option table so that the main table knows when the user has selected an option

//Protocol defined in **OPTIONSTABLEVIEW**
@protocol OptionsTableDelegate <NSObject>

-(void)didSelectOption:(NSString *)option withtitleString:(NSString*)titleString;

@end

//Set the delegate property
@interface OptionsTableView : UITableView <UITableViewDataSource,UITableViewDelegate>
{
    id optionTableDelegate;
}

@end

This delegate method is triggered after the user selects an option in the optionstableview

//User selects an option and the delegate method is triggered
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    switch (indexPath.row) 
    {
        case OPTION_LATEST:
            self.option = @"for_you";
            self.titleString = [self.optionsArray objectAtIndex:OPTION_开发者_StackOverflow社区LATEST];
            break;

        case OPTION_RANDOM:
            self.option = @"random";
            self.titleString = [self.optionsArray objectAtIndex:OPTION_RANDOM];
            break;

        default:
            break;
    }

//Delegate method triggered to return the option and title string to the main table
[self.optionTableDelegate didSelectOption:self.option withtitleString:self.titleString];
}

In the main table (calling options table) I setup the options table delegate to self and also included the delegate method

//Main table **QUESTIONTABLEVIEWCONTROLLER**
- (void)viewDidLoad
{
    [super viewDidLoad];

    //Set up options tableview
    self.optionsTableHeight = 24 + (44*2);
    CGRect optionsTableFrame = CGRectMake(0, -optionsTableHeight, 320, optionsTableHeight);
    OptionsTableView *tempOptionsTable = [[OptionsTableView alloc]initWithFrame:optionsTableFrame style:UITableViewStyleGrouped];
    self.optionsTableView = tempOptionsTable;

    //Setting the delegate to self
    self.optionsTableView.optionTableDelegate = self;

    [self.view addSubview:self.optionsTableView];
}

And I tried to set the page title in the delegate method of the main table

//Delegate method in main table
-(void)didSelectOption:(NSString *)option withtitleString:(NSString *)titleString
{
    //Set title here (doesn't work)
    self.title = titleString;
    NSLog(@"title :%@",self.title);
    self.type = option;

    [self.optionsTableView slideOptionsTableOut];

    [self getData];

}

The title of my page doesn't get change in the above delegate method. Any advise on how I can change the title after selecting the option in the options table?

Try to make one of two:

1) Replace [self.optionTableDelegate didSelectOption:self.option withtitleString:self.titleString]; with [self didSelectOption:self.option withtitleString:self.titleString];

2) Replace self.optionsTableView.optionTableDelegate = self; with self.optionTableDelegate = self;

You can use [self.navigationItem setTitle:@"Your Title"]; to update the title of your navBar.