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POUITableView and alphabetical order
 

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  1. POUITableView and alphabetical order
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    <p>In my app I parse an XML file then I would like to show the entry of this file in a UITableView. I found on the <a href="http://www.devx.com/wireless/Article/43374" rel="nofollow noreferrer">web</a> how to make section in alphabetical order (like iPhone contacts), it works fine with my app. When i tap on a row in my tableview I want to display another ViewController, in which I will find some information about the row I tapped, but I'm having some problem: when I tap on a row the variable <code>indexPath.row</code> refers to the section and the information in new view controller aren't right. I will post here some screenshot to show you want I'm trying to explain.</p> <p>In the following pictures you can see how the app should work:</p> <p><img src="https://i.stack.imgur.com/9ov9w.png" alt="Correct"></p> <p>In the following pictures you can see the error of my app:</p> <p><img src="https://i.stack.imgur.com/guQwd.png" alt="error"></p> <p>You can see that in picture 1 the name is the same and in picture 2 you can see that the name it's wrong. I guess it depend on the variable <code>indexPath.row</code>. I will post here the code to create and populate the tableview:</p> <pre><code>#import "TableWasteViewController.h" #import "WasteXmlParser.h" #import "WasteDetailViewController.h" @interface TableWasteViewController () @property(nonatomic,strong)NSArray *arrayWastes; @property(nonatomic,strong)NSMutableArray *typeOfWaste; @property(nonatomic,strong)NSMutableArray *typeOfBin; @property(nonatomic,strong)NSMutableArray *indexWastes; @property(nonatomic,strong)NSMutableArray *typeOfWasteBackup; @end @implementation TableWasteViewController - (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. WasteXmlParser *parser = [[WasteXmlParser alloc]init]; [parser parseWasteXml]; self.arrayWastes = [[NSArray alloc]init]; self.arrayWastes = [parser.arrayWastes mutableCopy]; self.indexWastes = [[NSMutableArray alloc]init]; self.typeOfWaste = [[NSMutableArray alloc]init]; self.typeOfBin = [[NSMutableArray alloc]init]; for (int i = 0; i &lt; [self.arrayWastes count]; i++) { [self.typeOfWaste addObject:[[self.arrayWastes objectAtIndex:i] objectForKey:@"type"]]; [self.typeOfBin addObject:[[self.arrayWastes objectAtIndex:i]objectForKey:@"place"]]; } for (int i = 0; i &lt; [self.typeOfWaste count]-1; i++) { char alphabet = [[self.typeOfWaste objectAtIndex:i] characterAtIndex:0]; NSString *uniChar = [NSString stringWithFormat:@"%c", alphabet]; if (![self.indexWastes containsObject:uniChar]) { [self.indexWastes addObject:uniChar]; } } self.typeOfWasteBackup = [self.typeOfWaste mutableCopy]; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return [self.indexWastes count]; } - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { return [self.indexWastes objectAtIndex:section]; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { NSString *alphabet = [self.indexWastes objectAtIndex:section]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@",alphabet]; NSArray *wastes = [self.typeOfWaste filteredArrayUsingPredicate:predicate]; return [wastes count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; UIFont *myFont = [UIFont fontWithName:@"Arial" size:14.0]; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } NSString *alphabet = [self.indexWastes objectAtIndex:[indexPath section]]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet]; NSArray *wastes = [self.typeOfWaste filteredArrayUsingPredicate:predicate]; if ([wastes count] &gt; 0) { NSString *cellValue = [wastes objectAtIndex:indexPath.row]; cell.textLabel.font = myFont; cell.textLabel.numberOfLines = 2; cell.textLabel.text = cellValue; } return cell; } - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { return self.indexWastes; } - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { NSIndexPath *indexPath = [self.tableWaste indexPathForSelectedRow]; WasteDetailViewController *vc = segue.destinationViewController; vc.typeOfWaste = [self.typeOfWaste objectAtIndex:indexPath.row]; vc.typeOfBin = [self.typeOfBin objectAtIndex:indexPath.row]; vc.urlPic = [self.arrayWastes[indexPath.row]objectForKey:@"imgUrl"]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (IBAction)backToHome:(id)sender { [self dismissViewControllerAnimated:YES completion:nil]; } @end </code></pre> <p>I hope you can help me to fix this issue. Thank you</p>
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