Xcode find table view section row on detail text label - objective-c

Question

I have an index set up with my table and I am able to return the correct arrays for the textLabel.text according to the section header. My problem is I have an a separate array that i need to return in the detailTextLabel.text.
It just repeats in each section starting from the first index from the first section. For example:
A
Apple
apple
Alligator
alligator
B
Ball
apple
Bat
alligator
I've generated index characters and table headers. This is what I have to return the cell.
NSString *alphabet = [arrayIndex objectAtIndex:[indexPath section]];
//---get all of First array's beginning with the letter---
NSPredicate *predicate =
[NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", alphabet];
NSArray *firstArray = [First filteredArrayUsingPredicate:predicate];
NSArray *secondArray = [Second filteredArrayUsingPredicate:predicate];
if ([FirstArray count]>0) {
//---extract the relevant state from the states object---
NSString *cellValue = [firstArray objectAtIndex:indexPath.row];
//<--This line throws and error assuming it is trying to find the first letter to return the detail text -->
NSString *cellValueA = [secondArray objectAtIndex:indexPath.row];
//Returns value from first section and row in all section//
//NSString *cellValueA = [Second objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
cell.detailTextLabel.text = cellValueA;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
How do I find the matching row to the First Array to return the correct index in the Second Array. Any help would be much appreciated. Thank You :-)
FULL CODE
-(void)loadSQL {
// Path to the database
NSString* dbPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"DATABASE_NAME.sqlite"];
NSLog(#"databasePath: %#",dbPath);
sqlite3 *database;
NSString *firstString;
NSString *secondString;
// Open the database
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) {
NSString *querySQL = [NSString stringWithFormat:
#"SELECT * FROM songs WHERE items LIKE %# ", viewItems];
const char *sql = [querySQL UTF8String];
sqlite3_stmt *compiledStmt;
// Fetch all names
if (sqlite3_prepare_v2(database, sql, -1, &compiledStmt, NULL) == SQLITE_OK) {
// Append each name
while (sqlite3_step(compiledStmt) == SQLITE_ROW) {
const char* cFirst = (char*)sqlite3_column_text(compiledStmt, 2);
const char* cSecond = (char*)sqlite3_column_text(compiledStmt, 3);
if (cFirst == NULL)
// There should not be a NULL name
NSLog(#"Null name!!");
else {
firstString = [NSString stringWithUTF8String:cName];
secondString = [NSString stringWithUTF8String:cArtist];
[First addObject:firstString];
[Second addObject:secondString];
//[First release];
//[Second release];
}
}
sqlite3_finalize(compiledStmt); // Cleanup the statement
}
else {
NSLog(#"Error retrieving data from database.");
}
sqlite3_close(database);
}
else {
NSLog(#"Error: Can't open database!");
}
//Creating section with 1st letter of the First field//
for (int i=0; i<[First count]-1; i++){
//---get the first char of each state---
char alphabet = [[First objectAtIndex:i] characterAtIndex:0];
NSString *uniChar = [NSString stringWithFormat:#"%C", alphabet];
//---add each letter to the index array---
if (![arrayIndex containsObject:uniChar])
{
[arrayIndex addObject:uniChar];
}
}
}
#pragma mark Table view methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
if (searching)
return 1;
else
return [arrayIndex count];
}
//---set the title for each section---
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if (searching)
return nil;
else
return [arrayIndex objectAtIndex:section];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (searching)
return([searchedFirst count]);
else{
//return([First count]);
NSString *alphabet = [songIndex objectAtIndex:section];
NSPredicate *predicate =[NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", alphabet];
NSArray *firstArray = [First filteredArrayUsingPredicate:predicate];
return [firstArray count];
}
}
//---set the index for the table---
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
if (searching) {
return nil;
}
return arrayIndex;
}
//return the cell info
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
if(searching) {
cell.textLabel.text = [searchedFirst objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [searchedSecond objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
else{
//---get the letter in the current section---
NSString *alphabet = [arrayIndex objectAtIndex:[indexPath section]];
//---get all states beginning with the letter---
NSPredicate *predicate =
[NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", alphabet];
NSArray *firstArray = [First filteredArrayUsingPredicate:predicate];
NSArray *secondArray = [Second filteredArrayUsingPredicate:predicate];
if ([songArray count]>0) {
NSString *firstValue = [firstArray objectAtIndex:indexPath.row];
NSString *secondValue = [secondArray objectAtIndex:indexPath.row];
cell.textLabel.text = firtValue;
cell.detailTextLabel.text = secondValue;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
}
return cell;
}

Answer 1

I am not sure I understand what you need, but if you are looking for the index in the array of a given object, then you can use:
indexOfObject:
Returns the lowest index whose corresponding array value is equal to a given object.
- (NSUInteger)indexOfObject:(id)anObject
(ref)

Answer 2

Answering the question from comments about restructuring....
First, create a custom class:
// CellLabels.h
#import <Foundation/Foundation.h>
#interface CellLabels : NSObject
#property (nonatomic, copy) NSString *firstText;
#property (nonatomic, copy) NSString *secondText;
#end
//CellLabels.m
#import "CellLabels.h"
#implementation CellLabels
#synthesize firstText = _firstText;
#synthesize secondText = _secondText;
#end
Instead of First and Second, create and initialize one NSMutableArray called cellData. Replace...
[First addObject:firstString];
[Second addObject:secondString];
...with...
CellLabels *labels = [[CellLabels alloc] init];
labels.first = firstString;
labels.second = secondString;
[cellData addObject:labels];
Then, your array filtering works by comparing "SELF.firstText" and your array references work by using:
CellLabels *labels = [filteredArray objectAtIndex:indexPath.row];
cell.textLabel.text = labels.firstText;
cell.detailTextLabel.text = labels.secondText;
(OK, I didn't check to make sure all that compiled but it should give you the idea.)