PrepareForSeque not called/fired

Question

C/xcode geeks!

I have been struggling with this error for hours now, and I don't seem to find the solution, although it seems as many people have had the exact same problem.

See code:

//
//  ListViewController.m
//  Puns
//
//  Created by Amit Bijlani on 12/13/11.
//  Copyright (c) 2011 Treehouse Island Inc. All rights reserved.
//

#import "ListViewController.h"
#import "BlogPost.h"
//#import "Pun.h"
#import "PunsTableViewCell.h"
#import "DetailViewController.h"

@implementation ListViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

#pragma mark - Segue

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    NSLog(@"0");
    if ( [[segue identifier] isEqualToString:@"ShowMenu"] ){
        NSLog(@"1");
        DetailViewController *dvc = (DetailViewController *)[segue destinationViewController];
        dvc.menu = [self.blogPosts objectAtIndex:[[self.tableView indexPathForSelectedRow] row]];
    }
}

#pragma mark - View lifecycle


- (void)viewDidLoad
{
    [super viewDidLoad];

    // GET WEB DATA SOURCE (JSON)

    // The url
    NSURL *blogURL = [NSURL URLWithString:@"http://constantsolutions.dk/json.html"];

    // The data
    NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];

    // Error variable
    NSError *error = nil;

    // jsonData to serialization
    NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

    // Get array 'posts'
    self.blogPosts = [NSMutableArray array];
    NSArray *blogPostsArray = [dataDictionary objectForKey:@"posts"];

    for (NSDictionary *bpDictionary in blogPostsArray) {
        // Get title
        // Will only retrieve data, if TITLE exists

        BlogPost *blogPost = [BlogPost blogPostWithTitle:[bpDictionary objectForKey:@"title"]];

        // Get the content
        blogPost.content = [bpDictionary objectForKey:@"content"];

        // Get thumbnail
        blogPost.thumbnail = [bpDictionary objectForKey:@"thumbnail"];

        // Get date
        blogPost.date = [bpDictionary objectForKey:@"date"];

        // Get price
        blogPost.price = [bpDictionary objectForKey:@"price"];

        // Add the object to blogPosts array
        [self.blogPosts addObject:blogPost];
    }
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [self.blogPosts count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"PunTableViewCell";

    PunsTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[PunsTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    BlogPost *blogPost = [self.blogPosts objectAtIndex:indexPath.row];

    cell.menuTitle.text = blogPost.title;
    cell.menuContent.text = blogPost.content;

    if([blogPost.price length] == 0) {
        [cell.menuPrice setHidden:YES];
    } else {
        cell.menuPrice.text = blogPost.price;
    }



    return cell;
}


@end

As you can see, I have implented NSLog() inside the prepareForSegue, but it is not triggered.

Do you guys have any idea what I am doing wrong? I am pretty new to this, so I still haven't found out this whole iPhone development thing. So bare over with me if the solution is simple :o).

Thanks in advance!

Answer 1

You have a name for the segue, so does that mean you created it by dragging from a button or table view cell to the other view controller and then selected it and named it in xcode? if you are programmatically changing the view it wont be called but you can manually call a method before swapping views to prepare

I had a similar issue in going about sharing information in ios between views where the answer may be helpful.

In particular from the answer on that post where he says:

"in your .m file you would trigger you segue - maybe on a button or some action. sounds like you already have this:"

[self performSegueWithIdentifier:@"viewB" sender:self];

--

Swapping your segue name in of course.