Passing selected row to detail view - ios

Question

Evening,
I am in the process of configuring my detail view. The data is held in a plist file, each item having a word and definition. The cells in the tableview are labelled with the word. I am looking for each word to lead to the detail view showing both word and definition.
At the moment the code is showing the wrong word. I have been trying to set word and definition in the tableview.m and then use these to set the label in detail view.
So my query is why the wrong word is showing and how I can grab the correct definition to match the word.
My code is below.
Thank you.
#import "RCViewController.h"
#import "detailViewController.h"
#interface RCViewController ()
#end
#implementation RCViewController
static NSString *CellIdentifier = #"Cell Identifier";
#synthesize words;
#synthesize alphabetizedWords;
#synthesize wordDictionary;
-(NSDictionary *)alphabetizedWords:(NSArray *)wordsArray {
NSMutableDictionary *buffer = [[NSMutableDictionary alloc]init];
for (int i=0; i <words.count; i++) {
NSString *word = [words objectAtIndex:i];
NSString *firstLetter = [[word substringToIndex:1]uppercaseString];
if ([buffer objectForKey:firstLetter]) {
[(NSMutableArray *)[buffer objectForKey:firstLetter]addObject:word];
}
else {
NSMutableArray *mutableArray = [[NSMutableArray alloc]initWithObjects:word, nil];
[buffer setObject:mutableArray forKey:firstLetter];
}
}
NSArray *keys = [buffer allKeys];
for (int j; j<keys.count; j++) {
NSString *key = [keys objectAtIndex:j];
[(NSMutableArray *)[buffer objectForKey:key]sortUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
}
NSDictionary *result = [NSDictionary dictionaryWithDictionary:buffer];
return result;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSArray *keys = [self.alphabetizedWords allKeys];
return [keys count];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSArray *unsortedKeys = [self.alphabetizedWords allKeys];
NSArray *sortedKeys = [unsortedKeys sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
NSString *key = [sortedKeys objectAtIndex:section];
NSArray *wordsForSection = [self.alphabetizedWords objectForKey:key];
return [wordsForSection count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSArray *unsortedKeys = [self.alphabetizedWords allKeys];
NSArray *sortedKeys = [unsortedKeys sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
NSString *key = [sortedKeys objectAtIndex:[indexPath section]];
NSArray *wordsForSection = [self.alphabetizedWords objectForKey:key];
NSString *word = [wordsForSection objectAtIndex:[indexPath row]];
[cell.textLabel setText:word];
return cell;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
NSArray *keys = [[self.alphabetizedWords allKeys]sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
NSString *key = [keys objectAtIndex:section];
return key;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// perform the segue by getting the cell selected and passing it to the prepareForSegue method
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[self performSegueWithIdentifier:#"showDetail" sender:cell];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
detailViewController *destViewController = segue.destinationViewController;
destViewController.word = [words objectAtIndex:indexPath.row];
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *path = [[NSBundle mainBundle]pathForResource:#"words" ofType:#"plist"];
NSArray *wordsDictionary = [NSArray arrayWithContentsOfFile:path];
self.words = [wordsDictionary valueForKey:#"Word"];
self.alphabetizedWords = [self alphabetizedWords:self.words];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
#import <UIKit/UIKit.h>
#interface detailViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *wordLabel;
#property (nonatomic, strong) NSString *word;
#property (weak, nonatomic) IBOutlet UILabel *definitionLabel;
#property (strong, nonatomic)NSString *definition;
#end
#import "detailViewController.h"
#interface detailViewController ()
#end
#implementation detailViewController
#synthesize word;
#synthesize wordLabel;
#synthesize definition;
#synthesize definitionLabel;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
wordLabel.text = word;
definitionLabel.text = definition;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#end

Answer 1

You need to use the same logic in prepareForSegue to get your word that you use in cellForRowAtIndexPath,
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
detailViewController *destViewController = segue.destinationViewController;
NSArray *unsortedKeys = [self.alphabetizedWords allKeys];
NSArray *sortedKeys = [unsortedKeys sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
NSString *key = [sortedKeys objectAtIndex:[indexPath section]];
NSArray *wordsForSection = [self.alphabetizedWords objectForKey:key];
NSString *word = [wordsForSection objectAtIndex:[indexPath row]];
destViewController.word = word;
}
}

Answer 2

Having a dictionary called alphabetizedWords is pretty pointless, since dictionaries are inherently unordered. You should set up your data structure in an array. Perhaps you want an array of dictionaries, where each dictionary contains a word in one key and the definition in the other key. You can sort the array and use to feed the table view data source, and also to respond to a tap and pass the info to your detail view controller.