sudden EXC_BAD_ACCESS at - (NSString *)tableView: titleForHeaderInSection: - ios

Question

I think just showing my whole code is better than my explanation.. actually I'm not good at expressing something in English.X(
this code is .h file for .m file below.
#import <UIKit/UIKit.h>
#define kImageValueTag 0
#define kNameValueTag 1
#define kSubtitleValueTag 2
#define kMemoValueTag 3
#class PhonebookDetailedViewController;
#interface PhonebookViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
{
UITableViewCell *tvCell;
UITableView *tableView;
UISearchBar *searchBar;
NSString *fullName;
NSMutableDictionary *names, *pictures;
NSArray *keys, *sortedKeys, *sortedAllValues;
PhonebookDetailedViewController *childController;
}
#property (nonatomic, retain) IBOutlet UITableViewCell *tvCell;
#property (nonatomic, retain) IBOutlet UISearchBar *searchBar;
#property (nonatomic, retain) IBOutlet UITableView *tableView;
#property (nonatomic, retain) UIImage *phoneImage;
#property (nonatomic, retain) NSString *fullName;
#property (nonatomic, retain) NSMutableDictionary *names;
#property (nonatomic, retain) NSMutableDictionary *pictures;
#property (nonatomic, retain) NSArray *keys;
#property (nonatomic, retain) NSArray *sortedKeys;
#property (nonatomic, retain) NSArray *sortedAllValues;
#end
this code is for the .m file that implement showing a table. When I try to scroll the table down, the error named EXC_BAD_ACCESS is suddenly called at - (NSString *)tableView: titleForHeaderInSection: method. I guess sortedKeys releases at somewhere because I can do [sortedKeys count] before error, but cannot when error comes. I don't know where it releases and why it releases, however. Please show your ideas to me. Any ideas are okay. Thank you in advance.
#import "PhonebookViewController.h"
#import "PhonebookDetailedViewController.h"
#import "NSString-SortForIndex.h"
#implementation PhonebookViewController
#synthesize tvCell;
#synthesize searchBar;
#synthesize tableView;
#synthesize phoneImage;
#synthesize fullName;
#synthesize names, pictures;
#synthesize keys, sortedAllValues, sortedKeys;
//- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
//{
// self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
// if (self) {
// // Custom initialization
// }
// return self;
//}
//- (void)didReceiveMemoryWarning
//{
// // Releases the view if it doesn't have a superview.
// [super didReceiveMemoryWarning];
//
// // Release any cached data, images, etc that aren't in use.
//}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect bounds = self.tableView.bounds;
bounds.origin.y = bounds.origin.y + searchBar.bounds.size.height;
self.tableView.bounds = bounds;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *nameFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"nameContacts.dict"];
NSString *pictureFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"imageContacts.dict"];
self.names = (NSMutableDictionary *)[NSKeyedUnarchiver unarchiveObjectWithFile:nameFilePath];
self.pictures = (NSMutableDictionary *)[NSKeyedUnarchiver unarchiveObjectWithFile:pictureFilePath];
self.keys = [self.names allKeys];
sortedKeys = [self.keys sortedArrayUsingSelector:#selector(sortForIndex:)];
sortedAllValues = [[NSArray alloc] init];
for (NSString *sortedKey in sortedKeys)
{
NSArray *selectedValues = [self.names valueForKey:sortedKey];
for (NSString *selectedValue in selectedValues)
sortedAllValues = [sortedAllValues arrayByAddingObject:selectedValue];
}
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
self.tableView = nil;
self.searchBar = nil;
self.tvCell = nil;
self.fullName = nil;
self.names = nil;
self.pictures = nil;
self.keys = nil;
self.sortedKeys = nil;
self.sortedAllValues = nil;
}
- (void)dealloc
{
[tableView release];
[searchBar release];
[tvCell release];
[fullName release];
[names release];
[pictures release];
[keys release];
[sortedKeys release];
[sortedAllValues release];
[super dealloc];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table Data Source Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [sortedKeys count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSString *key = [sortedKeys objectAtIndex:section];
NSArray *nameSection = [names objectForKey:key];
return [nameSection count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CustomCellIdentifier = #"CustomCellIdentifier";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CustomCellIdentifier];
if ( cell == nil )
{
NSArray *nib = [[NSBundle mainBundle]
loadNibNamed:#"CustomPhonebookCell"
owner:self
options:nil];
if (nib.count > 0)
{
cell = self.tvCell;
} else
{
NSLog(#"Failed to load CustomPhonebookCell nib file!");
}
}
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
NSUInteger row = [indexPath row];
NSUInteger section = [indexPath section];
NSString *foundKey = [sortedKeys objectAtIndex:section];
NSArray *nameSection = [self.names objectForKey:foundKey];
UILabel *nameLabel = (UILabel *)[cell viewWithTag:kNameValueTag];
nameLabel.text = [nameSection objectAtIndex:row];
return cell;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *key = [sortedKeys objectAtIndex:section]; // EXC_BAD_ACCESS error at here
return key;
}

Answer 1

sortedKeys is not properly retained. When you set it use self.
self.sortedKeys = [self.keys sortedArrayUsingSelector:#selector(sortForIndex:)];