I have an NSMutableArray in which I insert the values when any user selects the field and this is an multi selection field so I can insert the data according to multiple selection in NSMutableArray but when user unselects an selected field then how can I remove the value of unselected field which are selected earlier.
yourviewcontroller.h
NSMutableArray *arr_select;
NsMutableArray *your_arry;
Yourviewcontroller.m
- (void)viewDidLoad
{
arr_select=[[NSMutableArray alloc]init];
for (int i = 0; i < [your_arry count]; i++)
{
[arr_select addObject:#"0"];
[arr_select retain];
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"%#",arr_select);
NSNumber *anumber = [NSNumber numberWithInteger:indexPath.row];
if([[arr_select objectAtIndex:indexPath.row] isEqualToString:#"0"])
{
[arr_select replaceObjectAtIndex:indexPath.row withObject:#"1"];
[arr_select retain];
}
else
{
[arr_select replaceObjectAtIndex:indexPath.row withObject:#"0"];
[arr_select retain];
}
NSLog(#"%#",arr_select);
[tableView reloadData];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if([[arr_select objectAtIndex:indexPath.row]isEqualToString:#"0"])
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
else
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
-(IBAction)Done:(id)sender
{
NSLog(#"%#",arr_select);
NSLog(#"%#",co_arr);
arr_data = [[NSMutableArray alloc] init];
for (int i = 0; i <[arr_select count]; i++)
{
if([[arr_select objectAtIndex:i] isEqualToString:#"1"])
{
NSLog(#"%d",i);
[arr_data addObject:[co_arr objectAtIndex:i]];
[arr_data retain];
}
}
Related
I am interning for the summer on an iOS native app development team. They gave me a task of accomplishing removing/inserting cells in a tableview without using sections. I am struggling with the task if anyone could take a look at the code and try to help me out id be much appreciated. I am getting some removals and disappearances but it is not staying consistent, and it is adding cells that are already visible. (consistency in the sense that once i insert rows, row 3 is now row 5, and my modulo arithmetic gets thrown off.
I am very new to objective c so any advice / help would be much appreciated.
#implementation MasterViewController
NSMutableArray * levels;
NSMutableArray * array;
NSMutableIndexSet * expandedSections;
NSMutableDictionary * dict;
-(BOOL) loadFiles{
// NSFileManager * fileManager = [NSFileManager defaultManager];
if (!expandedSections) {
expandedSections = [[NSMutableIndexSet alloc]init];
}
array = [[NSMutableArray alloc]init];
levels = [[NSMutableArray alloc]init];
for (int i=0; i<20; i++) {
NSString * temp = [[NSString alloc]initWithFormat:#"This is row : %i ", i];
[array addObject:temp];
}
for (int i=0; i<20; i++) {
NSNumber * temp = [[NSNumber alloc]initWithInt:i];
[levels addObject:temp];
}
dict = [[NSMutableDictionary alloc]initWithObjects:array forKeys:levels];
NSLog(#"TEST: %#", [dict objectForKey:[levels objectAtIndex:1]]);
return YES;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Master", #"Master");
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self loadFiles];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)insertNewObject:(id)sender {
if (!_objects) {
_objects = [[NSMutableArray alloc] init];
}
[_objects insertObject:[NSDate date] atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if ([expandedSections containsIndex:section]) {
return [array count] +2;
}
return [array count];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if (!(indexPath.row %3)==0) {
cell.textLabel.text = [dict objectForKey:[levels objectAtIndex:indexPath.row]];
[cell setIndentationLevel:2];
cell.accessoryType = UITableViewCellAccessoryNone;
cell.accessoryView = nil;
} else {
cell.textLabel.text = [dict objectForKey:[levels objectAtIndex:indexPath.row]];
[cell setIndentationLevel:0];
}
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle: (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[_objects removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (!self.detailViewController) {
self.detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
}
BOOL currentlyExpanded = [expandedSections containsIndex:indexPath.row];
//[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSLog(#"CurrentlyExpanded : %d", currentlyExpanded);
NSLog(#"TEST: %#", [dict objectForKey:[levels objectAtIndex:indexPath.row ]]);
if ((indexPath.row %3)==0) {
// only first row toggles exapand/collapse
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSInteger section = indexPath.section;
BOOL currentlyExpanded = [expandedSections containsIndex:section];
NSInteger rows;
NSMutableArray *tmpArray = [NSMutableArray array];
if (currentlyExpanded) {
rows = 2;
[expandedSections removeIndex:section];
} else {
[expandedSections addIndex:section];
rows = 2;
}
for (int i=indexPath.row+1; i<=(indexPath.row + rows); i++) {
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:section];
[tmpArray addObject:tmpIndexPath];
}
if (currentlyExpanded) {
[tableView deleteRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
} else {
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
}
}
if ((indexPath.row %3)>0) {
NSDate *object = _objects[indexPath.row];
self.detailViewController.detailItem = object;
[self.navigationController pushViewController:self.detailViewController animated:YES];
}
}
#end
Take a look at TLIndexPathTools. It greatly simplifies building dynamic tables like this. It does all the work calculating and performing the batch updates for you. Try running the Outline sample project. It demonstrates how to build an expandable tree without using sections. You can accomplish what you need by just building up a two-level tree.
I have Plist which is been populated on the tableview with expanded sections ..now i want to search the table..below in images you can see what is happening when I search anything.
.
just because I am searching it but need some changes in the cellforrowatindexpath for search results....
please check the code and let me know what to do for searching plist..
what should be changes for the cellforrowatindexpath and noofrowsinsection for search from plist
.
.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [self.mySections count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSInteger rows = 0;
if ([self tableView:tableView canCollapseSection:section] || !(tableView == self.searchDisplayController.searchResultsTableView) )
{
if ([expandedSections containsIndex:section] )
{
NSString *key = [self.mySections objectAtIndex:section];
NSArray *dataInSection = [[self.myData objectForKey:key] objectAtIndex:0];
return [dataInSection count];
}
return 1;
} else if(tableView == self.searchDisplayController.searchResultsTableView) {
rows = [self.searchResults count];
return rows;
}
return 1;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection: (NSInteger)section {
NSString *key = [self.mySections objectAtIndex:section];
return [NSString stringWithFormat:#"%#", key];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
//some changes required to display plst
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] ;
}
// Configure the cell...
if ([tableView isEqual:self.searchDisplayController.searchResultsTableView]) {
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
}else {
NSUInteger section = [indexPath section];
NSUInteger row = [indexPath row];
NSString *key = [self.mySections objectAtIndex:section];
NSDictionary *dataForSection = [[self.myData objectForKey:key] objectAtIndex:0];
NSArray *array=dataForSection.allKeys;
cell.textLabel.text = [[dataForSection allKeys] objectAtIndex:row];
cell.detailTextLabel.text=[dataForSection valueForKey:[array objectAtIndex:indexPath.row]];
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([self tableView:tableView canCollapseSection:indexPath.section])
{
if (!indexPath.row)
{
// only first row toggles exapand/collapse
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSInteger section = indexPath.section;
BOOL currentlyExpanded = [expandedSections containsIndex:section];
NSInteger rows;
NSMutableArray *tmpArray = [NSMutableArray array];
if (currentlyExpanded)
{
rows = [self tableView:tableView numberOfRowsInSection:section];
[expandedSections removeIndex:section];
}
else
{
[expandedSections addIndex:section];
rows = [self tableView:tableView numberOfRowsInSection:section];
}
for (int i=1; i<rows; i++)
{
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:section];
[tmpArray addObject:tmpIndexPath];
}
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (currentlyExpanded)
{
[tableView deleteRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [DTCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:DTCustomColoredAccessoryTypeDown];
}
else
{
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [DTCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:DTCustomColoredAccessoryTypeUp];
}
}
}
}
- (void)filterContentForSearchText:(NSString*)searchText
scope:(NSString*)scope
{
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"SELF contains[cd] %#",
searchText];
self.searchResults = [self.mySections filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
UISearchBar * searchBar = [controller searchBar];
[self filterContentForSearchText:searchString scope:[[searchBar scopeButtonTitles] objectAtIndex:[searchBar selectedScopeButtonIndex]]];
return YES;
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
UISearchBar * searchBar = [controller searchBar];
[self filterContentForSearchText:[searchBar text] scope:[[searchBar scopeButtonTitles] objectAtIndex:searchOption]];
return YES;
}
The search results you are using in numberOfRows should be used for numberOfSections
Since you are filtering for section title and not rows.
I'm having trouble inserting an array to the table view. I have an array and i stored it in alDescArray.
Which is alDescArray = (
"Block1",
"Block2",
"Block3"
) where its printed in through NSLog. The table doesn't show anything which part of my code when wrong?
- (void)viewDidLoad
{
NSArray *BusRoute = alightDesc;
int i;
int count = [BusRoute count];
for (i = 0; i < count; i++)
{
NSDictionary *dic = [BusRoute objectAtIndex: i];
NSDictionary *STEPS = [dic valueForKey:#"STEPS"];
alDescArray = [STEPS valueForKey:#"AlightDesc"];
}
[super viewDidLoad];
}
and this is the code for tableview
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [alDescArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text = [alDescArray objectAtIndex:indexPath.row];
return cell;
}
Pls help thanks
Apparently your tableview's delegate / dataSource is not set.
.h
YourClassName : ParentClass <UITableViewDelegate, UITableViewDataSource>
.m
- (void)viewDidLoad
{
yourTableView.delegate = self;
yourTableView.dataSource = self;
NSArray *BusRoute = alightDesc;
int i;
int count = [BusRoute count];
for (i = 0; i < count; i++)
{
NSDictionary *dic = [BusRoute objectAtIndex: i];
NSDictionary *STEPS = [dic valueForKey:#"STEPS"];
alDescArray = [STEPS valueForKey:#"AlightDesc"];
}
[super viewDidLoad];
}
I am new to xcode and making my first iPhone app.
I have a UITableview with 8 rows in a tabbed screen. I have a code which let's the user select maximum 4 rows at a time and mark it with checks when selected.
Now, when I change the view and navigate to the next tab I want to save the text from these checked rows in a single NSString variable separated by commas.
Is it possible to do so? Thank you, any help is very much appreciated.
Here is the code of the first tab from where I want to save the selected rows.
#implementation Psychological
static int count = 0;
- (void)viewDidLoad {
[super viewDidLoad];
listOfItems = [[NSMutableArray alloc] init];
[listOfItems addObject:#"1 option"];
[listOfItems addObject:#"2 option"];
[listOfItems addObject:#"3 option"];
[listOfItems addObject:#"4 option"];
[listOfItems addObject:#"5 option"];
[listOfItems addObject:#"6 option"];
[listOfItems addObject:#"7 option"];
[listOfItems addObject:#"8 option"];
}
#pragma mark -
#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 [listOfItems count];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
NSString *cellValue = [listOfItems objectAtIndex:indexPath.row];
cell.text = cellValue;
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
if ([selectedCell accessoryType] == UITableViewCellAccessoryNone) {
if(count < 4)
{
[selectedCell setAccessoryType:UITableViewCellAccessoryCheckmark];
[selectedIndexes addObject:[NSNumber numberWithInt:indexPath.row]];
count++;
}
} else {
[selectedCell setAccessoryType:UITableViewCellAccessoryNone];
[selectedIndexes removeObject:[NSNumber numberWithInt:indexPath.row]];
count --;
}
[tableView deselectRowAtIndexPath:indexPath animated:NO];
}
- (void)dealloc {
[listOfItems release];
[super dealloc];
}
#end
the easiest way is make method wich will return string that you need. Method will look something like this:
- (NSString *) selectedItems {
NSMutableString *result = [NSMutableString string];
for (int i = 0; i < [itemsArray count]; i++) {
NSIndexPath *path = [NSIndexPath indexPathForRow:i inSection:0];
[tableView scrollToRowAtIndexPath:path atScrollPosition:UITableViewScrollPositionMiddle animated:NO];
UITableViewCell *cell = [tableView cellForRowAtIndexPath:path];
if (cell.accessoryType == UITableViewCellAccessoryCheckmark) {
[result appendFormat:#"%#",cell.textLabel.text];
}
}
if (result.length > 2) {
[result replaceCharactersInRange:NSMakeRange(result.length-1, 1) withString:#""];
}
return result;
}
To get this line in another view controller you should find Psychological view controller in navigationController.viewController and call this method.
- (void) method {
for (UIViewController *vc in self.navigationController.viewControllers) {
if ([vc isKindOfClass:[Psychological class]]) {
NSString *str = vc.selectedItems;
}
}
}
Hope the following code suits your requirement:
//didSelect method
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
if ([selectedCell accessoryType] == UITableViewCellAccessoryNone) {
if(count < 4) {
[selectedCell setAccessoryType:UITableViewCellAccessoryCheckmark];
[selectedIndexes addObject:[NSNumber numberWithInt:indexPath.row]];
count++;
}
} else {
[selectedCell setAccessoryType:UITableViewCellAccessoryNone];
[selectedIndexes removeObject:[NSNumber numberWithInt:indexPath.row]];
count --;
}
[tableView deselectRowAtIndexPath:indexPath animated:NO];
}
Declare the selectedCell globally to access in all tabs
NSMutableString *selectedCell = [[NSMutableString alloc]init]; //Should declare this string globally
//Use the following code in -viewWillDisappear Method or where you feel it fits (method that called when navigating from present class)
for(int i = 0; i < [selectedIndexes count]; i++){
[selectedCell appendString:[selectedIndexes objectAtIndex:i];
[selectedCell appendString:#","];
}
NSRange range = {[selectedCell length]-1,1};
[selectedCell deleteCharactersInRange:range];
NSMutableString *selectedRow=[NSMutableString alloc]init];
for(int i=0; i<[count];i++)
{
selectedRow=[arrayName objectAtIndex:row];
[selectedRow appendString:#","];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
if (selectedCell.accessoryType == UITableViewCellAccessoryNone) {
if(count<4){
selectedCell.accessoryType = UITableViewCellAccessoryCheckmark;
[[listOfItems objectAtIndex:indexPath.row]setObject:#"YES" forKey:#"Selected"];
count++;
}
} else if (selectedCell.accessoryType == UITableViewCellAccessoryCheckmark) {
if(count>=0){
selectedCell.accessoryType = UITableViewCellAccessoryNone;
[[listOfItems objectAtIndex:indexPath.row]setObject:#"NO" forKey:#"Selected"];
count--;
}
}
replace above code and when you want to navigate your page at that time check whether Selected value yes or no if yes then pass that value otherwise leave it.
for (int i =0 ; i<[listOfItems count]; i++) {
if ([[[listOfItems objectAtIndex:i]valueForKey:#"Selected"]isEqualToString:#"YES"]) {
if ([selectedId length]==0) {
selectedId = [NSString stringWithFormat:#"%#",[[listOfItems objectAtIndex:i]valueForKey:#"user_id"]];
}else {
selectedId = [selectedId stringByAppendingFormat:#",%#",[[listOfItems objectAtIndex:i]valueForKey:#"user_id"]];
}
}
}
You may want to have a global array.
Store the selected values into that global array then it would be easy to display them elsewhere.. :-)
Create a new class, let's call it Option, and give it two properties. One is a NSString called name and the other is a BOOL called selected. Instead of having listOfItems as an array of strings, make it a list of Option objects. Have each Option keep track of whether or not it's currently selected.
Make the controller class that owns listOfItems into a UITabBarControllerDelegate and implement tabBarController:didSelectViewController: so that it builds the string and passes it to the next selected controller.
When I am scrolling my table way too down, application crushes. And I cannot find where the error in code is.
Here is my code:
NSMutableDictionary *tableDataDictionary;
NSInteger *rows_in_section;
-(void) initView
{
if (!tableDataDictionary)
{
tableDataDictionary = [ [NSMutableDictionary alloc] init];
}
[self reloadTableData];
}
-(void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
[mainTableView deselectRowAtIndexPath: [mainTableView indexPathForSelectedRow] animated:NO];
[tableDataDictionary release];
tableDataDictionary = nil;
free(rows_in_section);
}
-(void) reloadTableData {
[tableDataDictionary removeAllObjects];
//Sections
if (rows_in_section)
{
free(rows_in_section);
}
rows_in_section = (NSInteger*)calloc(25, sizeof(NSInteger));
for (int i = 0; i <= 25; i++)
{
rows_in_section[i] = 0;
}
NSMutableArray *words_in_section = [ [NSMutableArray alloc] init];
int cur_section = -1;
while ( TRUE )
{
WordObject *tempWordObj = [ [WordsDatabase sharedWordsDatabase] getNextWordABC];
if (!tempWordObj)
{
[tableDataDictionary setObject:words_in_section forKey:[NSNumber numberWithInt: cur_section] ];
[tempWordObj release];
[tableDataDictionary setObject:[words_in_section copy] forKey:[NSNumber numberWithInt: cur_section] ];
[words_in_section removeAllObjects];
break;
}
//First loop
if (cur_section == -1) cur_section = toupper([ [tempWordObj word] characterAtIndex:0 ] ) - 'A';
//If a has letter changed, assign the previous array to a dictionary
if ( (toupper([ [tempWordObj word] characterAtIndex:0 ] ) - 'A') != cur_section )
{
[tableDataDictionary setObject:[words_in_section copy] forKey:[NSNumber numberWithInt: cur_section] ];
[words_in_section removeAllObjects];
}
cur_section = toupper([ [tempWordObj word] characterAtIndex:0 ] ) - 'A';
[words_in_section addObject:tempWordObj];
[tempWordObj release];
tempWordObj = nil;
rows_in_section[cur_section]++;
}
[words_in_section release];
[ [WordsDatabase sharedWordsDatabase] endGettingWordsABC];
[mainTableView reloadData];
[mainTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:NO];
}
//
// Table handling
//
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 26;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return rows_in_section[section];
}
// Adding a section index here
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
return ALPHA_ARRAY;
}
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index {
return index;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
DebugLog(#"cellForRowAtIndexPath");
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
WordObject *tempWordObj = [ [tableDataDictionary objectForKey: [NSNumber numberWithInt:[indexPath section] ] ] objectAtIndex: [indexPath row] ];
if (!tempWordObj)
{
DebugLog(#"!tempWordObj");
return cell;
}
cell.text = [tempWordObj word];
[tempWordObj release];
return cell;
}
How can I solve this problem with scrolling down and why it occurs?
And if you will find any other disadvantages in my code, please tell me this.
Thank you in advance,
Ilya.
You do not need this line;
[tempWordObj release];
[NSDictionary objectForKey] returns an auto-released object, that is the object will be automatically released sometime after your function returns.