I am trying to develop a part of my application where i can create two UIPickerView one depends on the other. Here is my code below as i have two UIpickerview (pickerView1 and pickerView2). when I change the selects of pickerView1 one ,the data must be changed in pickerView2.
the problem is when I change the select of pickerView1 every time i have old select. for example
if i select the second value of pickerView1 and before i select the first value of pickerView1, then i have on pickerView2 the value of first select and not for second value.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
arrayNo = [[NSMutableArray alloc] init];
[arrayNo addObject:#" 100 "];
[arrayNo addObject:#" 200 "];
arrayNo2= [[NSMutableArray alloc] init];
[arrayNo2 addObject:#" a "];
[arrayNo2 addObject:#" e "];
[arrayNo2 addObject:#" c "];
[arrayNo2 addObject:#" v "];
[arrayNo2 addObject:#" g "];
arrayNo3 = [[NSMutableArray alloc] init];
[arrayNo3 addObject:#""];
NSArray *keys = [NSArray arrayWithObjects:#" ",#"key1", #"key2", nil];
NSArray *objects = [NSArray arrayWithObjects:arrayNo3,arrayNo, arrayNo2, nil];
_dataOfProfile = [NSDictionary dictionaryWithObjects:objects
forKeys:keys];
pickerView1.tag = 1;
pickerView2.tag = 2;
[pickerView1 selectRow:0 inComponent:0 animated:NO];
[pickerView2 selectRow:0 inComponent:0 animated:NO];
selectedKey =[keys objectAtIndex:0];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// returns the number of 'columns' to display.
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent: (NSInteger)component
{
if (pickerView.tag == 1)
{
NSArray *key = [_dataOfProfile allKeys];
return [key count];
}
else
{
if (pickerView.tag == 2)
{
NSArray *keys =[_dataOfProfile objectForKey:selectedKey];
return [keys count];
}
}
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if (pickerView.tag == 1)
{
NSArray *keys =[_dataOfProfile allKeys];
return [keys objectAtIndex:row];
}
else
{
if (pickerView.tag == 2)
{
return [[_dataOfProfile objectForKey:selectedKey] objectAtIndex:row];
}
}
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (pickerView.tag == 1)
{
//Means a value just changed on your picker 2!, update datasource for your second picker
[pickerView2 reloadComponent:0];
selectedKey= [[_dataOfProfile allKeys] objectAtIndex:row];
}
}
Try like following -
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (pickerView.tag == 1)
{
//Means a value just changed on your picker 2!, update datasource for your second picker
//write this line before loading the picker.....
selectedKey= [[_dataOfProfile allKeys] objectAtIndex:row];
[pickerView2 reloadComponent:0];
}
}
I have a main array, that contains a whole bunch of dictionaries, what I want to do is to have all those dictionaries sorted according to their assigned tag. This is how a dictionary might look:
date = "2012-12-04 20:26:04 +0000";
name = H;
tag = "#J";
Heres how the main array looks:
MAIN_ARRAY
- dict1
- dict2
- dict3
I want to sort the main array like this:
MAIN_ARRAY
- tag1
- dict1
- dict2
- tag2
- dict3
Heres my code:
-(NSArray *)returnTagContent {
NSArray *tags = [all valueForKey:#"tag"];
NSMutableArray *adoptTags = [[[NSMutableArray alloc] init] autorelease];
for (NSString *tagQuery in tags) {
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"tag CONTAINS[cd] %#", tagQuery];
NSArray *roughArray = [all filteredArrayUsingPredicate:predicate];
NSArray *tagContent = [[NSSet setWithArray:roughArray] allObjects];
[adoptTags addObject:tagContent];
}
return adoptTags;
}
It returns the array, but now I want to organize it into section headers. How should I go about this?
I also have another piece of code with problem for returning the section header titles:
-(NSString *)returnTitleForTags {
NSString *uniqueTag = nil;
for (NSArray *tagContent in allTags) {
uniqueTag = [[[tagContent valueForKey:#"tag"] allObjects] lastObject];
}
return uniqueTag;
}
Problem? Well, I know it's because of lastObject but any other ideas to retrieve a NSString object of the array.
UPDATE: New code changes.
I update the array to display the sections when clicked by a button so like this:
isTagFilterOn=YES;
[self loadSectionsArray];
[self.tableView reloadData];
Heres the code for cellForRowAtIndexPath:
if (isTagFilterOn==YES) {
NSDictionary *dict = [[sectionsArray objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
cell.textLabel.text = [dict valueForKey:#"name"];
cell.detailTextLabel.text = [dict valueForKey:#"date"];
}
else {
NSString *object = all[indexPath.row];
cell.textLabel.text = [object valueForKey:#"name"];
cell.detailTextLabel.text = [object valueForKey:#"tag"];
}
The rest
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if (isTagFilterOn==YES) {
return [sectionsArray count];
}
else {
return 1;
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (isTagFilterOn==YES) {
return [[sectionsArray objectAtIndex:section] count];
}
return all.count;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if (isTagFilterOn==YES) {
NSDictionary *dict = [[sectionsArray objectAtIndex:section] objectAtIndex:0];
return [dict objectForKey:#"tag"];
}
return nil;
}
I think your task becomes easier if you remove duplicate "tags" before you create the array for the table view data source:
// All tags:
NSArray *tags = [mainArray valueForKey:#"tag"];
// Remove duplicates and sort:
tags = [[[NSSet setWithArray:tags] allObjects] sortedArrayUsingSelector:#selector(compare:)];
// Build an "array of arrays (of dictionaries)" as data source:
sectionsArray = [NSMutableArray array];
for (NSString *tag in tags) {
NSPredicate *pred = [NSPredicate predicateWithFormat:#"tag == %#", tag];
NSArray *onesection = [mainArray filteredArrayUsingPredicate:pred];
[sectionsArray addObject:onesection];
}
For example, if the mainArray is
(
{ date = "2012-12-04 20:26:04 +0000"; name = H; tag = "#J"; },
{ date = "2013-12-04 20:26:04 +0000"; name = X; tag = "#J"; },
{ date = "2014-12-04 20:26:04 +0000"; name = Z; tag = "#L"; }
)
then sectionsArray will be
(
(
{ date = "2012-12-04 20:26:04 +0000"; name = H; tag = "#J"; },
{ date = "2013-12-04 20:26:04 +0000"; name = X; tag = "#J"; }
),
(
{ date = "2014-12-04 20:26:04 +0000"; name = Z; tag = "#L"; }
)
)
and you can easily access each section and each row within a section:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [sectionsArray count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[sectionsArray objectAtIndex:section] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = ...;
}
NSDictionary *dict = [[sectionsArray objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
cell.textLabel.text = [dict objectForKey:#"name"];
cell.detailTextLabel.text = [dict objectForKey:#"date"];
return cell;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSDictionary *dict = [[sectionsArray objectAtIndex:section] objectAtIndex:0];
return [dict objectForKey:#"tag"];
}
I am trying to make a calculating app that consists of a 2-column picker. The left side of the picker are data values and the data values are being pulled from a plist with the price of each item. The other side of the picker is a string going from 1 to 64.
I'm trying to figure out how to take the string values of both parts of the picker and convert them into an int (so they can be multiplied and printed out)
Here's my code (in its entirety)
#pragma mark - View lifecycle
- (void)viewDidLoad
{
NSBundle *bundle = [NSBundle mainBundle];
NSString *plistPath =[bundle pathForResource:#"worthList" ofType:#"plist"];
NSDictionary *dictionary = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
self.dataValues = dictionary;
[dictionary release];
NSArray *components = [self.dataValues allKeys];
NSArray *sorted = [components sortedArrayUsingSelector:#selector(compare:)];
self.values = sorted;
NSMutableArray *number =[[NSMutableArray alloc] init];
for(int x = 1; x < 65; x++)
{
NSString * numberString = [[NSString alloc] initWithFormat:#"%d",x];
[number addObject:numberString];
}
self.quantity = number;
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
self.doublePicker = nil;
self.dataValues = nil;
self.values = nil;
self.quantity = nil;
[self setDoublePicker:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)calculateItem:(id)sender
{
NSString *message = [[NSString alloc] initWithFormat:#""];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Thank you" message:message delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles: nil];
[alert show];
[alert release];
[message release];
}
#pragma mark -
#pragma Picker data source methods
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 2;
}
-(NSInteger)pickerView:(UIPickerView *) pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component == kValueComponent)
{
return [self.values count];
}
return [self.quantity count];
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent: (NSInteger)component
{
if (component == kValueComponent)
{
return [self.values objectAtIndex:row];
}
return [self.quantity objectAtIndex:row];
}
#end
Try this to convert your data string into an int and then do the calculation:
int = [yourString intValue];
Try this:
NSString *str=[NSString stringWithFormat:#"%#",[pickerArr objectAtIndex:row]];
int test=[str intValue];
HERE MINUTES AND SECONDS ARE ARRAY.
Delegate method of a picker.
You can use other delegate methods also.
Seconds and minutes are the array which loads the picker in your case use array which is feeded with plist.
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
switch (component) {
case 0:
minuteTime =[minutes objectAtIndex:row] intValue];
break;
case 1:
secondTime = [[seconds objectAtIndex:row] intValue];
break;
}
}
You can also use this method to distinguish strings further.
NSArray *greenTime = [yourstring componentsSeparatedByString:#":"];
NSLog(#"Green Time : %#\nFirst : %#\nSecond : %#",greenTime,[greenTime objectAtIndex:0],[greenTime objectAtIndex:1]);
below is the JSON i want to parse it in such a way that for e.g date 1st should all events in that section of table and 2nd date should show all related events in another section
I am parsing using below code but i am not getting required sequence
SBJsonParser *parser= [[SBJsonParser alloc] init];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.krsconnect.no/community/api.html?method=bareListEventsByCategory&appid=620&category-selected=350&counties-selected=Vest-Agder,Aust-Agder"]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *json_string = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
NSDictionary *object = [parser objectWithString:json_string error:nil];
NSArray *results = [parser objectWithString:json_string error:nil];
appDelegate.books1 = [[NSMutableArray alloc] init];
appDelegate.dates =[[NSMutableArray alloc]init];
for (int j=0;j<10; j++) {
NSDictionary *dictOne = [results objectAtIndex:j];
NSLog(#"%# - %#", [dictOne objectForKey:#"date"]);
Date *aDate = [[Date alloc] initWithDictionary:[results objectAtIndex:j]];
[appDelegate.dates addObject:aDate];
[aDate release];
}
for (int i=0; i<10; i++) {
NSDictionary *dictOne = [results objectAtIndex:i];
NSArray *activitiesArray = [dictOne objectForKey:#"events"];
NSDictionary *dictTwo = [activitiesArray objectAtIndex:i];
NSDictionary *eventDict=[dictTwo objectForKey:#"event"];
// NSLog(#"%# - %#", [dictOne objectForKey:#"date"]);
// NSLog(#"%# - %#", [dictTwo objectForKey:#"affectedDate"]);
// NSLog(#"%# - %#", [eventDict objectForKey:#"location"]);
NSInteger*date=[dictOne objectForKey:#"date"];
NSInteger*affectedDate=[dictTwo objectForKey:#"affectedDate"];
NSString*appId =[eventDict objectForKey:#"appId"];
NSString*eventId=[eventDict objectForKey:#"eventId"];
NSString*location=[eventDict objectForKey:#"location"];
NSString*municipality=[eventDict objectForKey:#"municipality"];
NSString*title=[eventDict objectForKey:#"title"];
Book1 *aBook=[[Book1 alloc] initWithDate:date affectedDate:affectedDate location:location municipality:municipality title:title];
[appDelegate.books1 addObject:aBook];
int count=[appDelegate.books1 count];
}
the json format is given below
http://www.krsconnect.no/community/api.html?method=bareListEventsByCategory&appid=620&category-selected=350&counties-selected=Vest-Agder,Aust-Agder
You need to aggregate your data in some different way.
Here is how I'd do that:
...
// why do you parse your json string two times?
//NSDictionary *object = [parser objectWithString:json_string error:nil];
NSArray *results = [parser objectWithString:json_string error:nil];
// You have memory leak here. I assume that books1 and dates are both properties with "retain" flag set.
//appDelegate.books1 = [[NSMutableArray alloc] init];
//appDelegate.dates =[[NSMutableArray alloc]init];
NSMutableArray *data = [NSMutableArray array]
self.data = data;
// check that what we've parsed is NSArray
if (results && [results isKindOfClass:[NSArray class]]) {
for (NSDictionary *sectionDict in results) {
if ([sectionDict isKindOfClass:[NSDictionary class]]) {
NSString *sectionTitle = [[sectionDict objectForKey:#"date"] description];
NSArray *events = [sectionDict objectForKey:#"events"];
if (date && events && [events isKindOfClass:[NSArray class]]) {
NSMutableArray *rows = [NSMutableArray arrayWithCapacity:[events count]];
for (NSDictionary *eventDict in events) {
if ([eventDict isKindOfClass:[NSDictionary class]]) {
[rows addObject:#"testRow"];
}
}
[data addObject:[NSDictionary dictionaryWithObjectsAndKeys: sectionTitle, #"section", rows, #"rows", nil]];
}
}
}
}
- (NSInteger) numberOfSectionsInTableView:(UITableView *)tblView {
return [data count];
}
- (NSInteger) tableView:(UITableView *)tblView numberOfRowsInSection:(NSInteger)section {
return [[[data objectAtIndex:section] objectForKey:#"rows"] count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [[data objectAtIndex:section] objectForKey:#"section"];
}
- (UITableViewCell *) tableView:(UITableView *)tblView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellID = #"DefaultCell";
UITableViewCell *cell = (UITableViewCell *)[tblView dequeueReusableCellWithIdentifier:cellID];
if ( cell == nil ) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID] autorelease];
}
cell.textLabel.text = [[[data objectAtIndex:indexPath.section] objectForKey:#"rows"] objectAtIndex:indexPath.row];
return cell;
}
I need to sort by value instead of Key, I think....
Heres where I populate my arrarys
const char *sql = "select cid, category from Categories ORDER BY category DESC";
sqlite3_stmt *statementTMP;
int error_code = sqlite3_prepare_v2(database, sql, -1, &statementTMP, NULL);
if(error_code == SQLITE_OK) {
while(sqlite3_step(statementTMP) == SQLITE_ROW)
{
int cid = sqlite3_column_int(statementTMP, 0);
NSString *category = [[NSString alloc] initWithUTF8String:(char *)sqlite3_column_text(statementTMP, 1)];
NSArray *arr=[[NSArray alloc]initWithObjects:category,nil];
[arrayTmp setObject:arr forKey:[NSString stringWithFormat:#"%i",cid]];
[self.cidList addObject:[NSString stringWithFormat:#"%i",cid]];
[category release];
[arr release];
}
}
sqlite3_finalize(statementTMP);
sqlite3_close(database);
self.allCategories = arrayTmp;
[arrayTmp release];
Heres the method where the arrays are re-sorted.
- (void)resetSearch {
NSMutableDictionary *allCategoriesCopy = [self.allCategories mutableDeepCopy];
self.Categories = allCategoriesCopy;
[allCategoriesCopy release];
NSMutableArray *keyArray = [[NSMutableArray alloc] init];
[keyArray addObject:UITableViewIndexSearch];
[keyArray addObjectsFromArray:[[self.allCategories allKeys]
sortedArrayUsingSelector:#selector(compare:)]];
self.keys = keyArray;
[keyArray release];
}
This is a problem i've had for some time, last time I looked at this I could find an altervative to sortedArrayUsingSelector compare?
EDIT
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger section = [indexPath section];
NSUInteger row = [indexPath row];
NSString *key = [keys objectAtIndex:section];
NSArray *nameSection = [Categories objectForKey:key];
static NSString *SectionsTableIdentifier = #"SectionsTableIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
SectionsTableIdentifier ];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier: SectionsTableIdentifier ] autorelease];
}
cell.textLabel.text = [nameSection objectAtIndex:row];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger section = [indexPath section];
NSUInteger row = [indexPath row];
NSString *key = [keys objectAtIndex:section];
NSArray *nameSection = [Categories objectForKey:key];
NSLog(#"the selected cid is = %i",[key intValue]);
selectButton.enabled = YES;
}
Anyone?
Your obviously attempting to construct an array for use in the -[UITableviewDatasource sectionIndexTitlesForTableView:]. As such, you need an array that looks like this (pseudo-code):
[UITableViewIndexSearch, 0_sectionTitle, 1_sectionTitle, 2_sectionTitle, ...]
I think your immediate problem is that you try to add the UITableViewIndexSearch string constant to the array before you sort which makes it impossible for it end up as the first element unless all your other elements sort below U.
The fix is simple, just add the constant after the sort. You can clean the code up while you're at it:
NSMutableArray *secIdx=[NSMutableArray arrayWithCapacity:[[self.allCategories allKeys] count]];
[secIdx addObjectsFromArray:[self.allCategories allKeys]];
[secIdx sortUsingSelector:#selector(compare:)];
[secIdx insertObject:UITableViewIndexSearch atIndex:0];
self.keys=secIdx;
Note that secIdx is autoreleased so you don't have to release it.
Aside from this problem, your code has a lot of unnecessary/dangerous elements that will make your app fragile and hard to maintain.
You are using a lot of init for objects that you could use autoreleased convenience methods for. The 'init`s poise the risk of memory leaks but give you no advantage.
You need to wrap scalar values in objects so they can be easily managed in collections.
You are using an unnecessary array.
You can rewrite the first block like so:
const char *sql = "select cid, category from Categories ORDER BY category DESC";
sqlite3_stmt *statementTMP;
int error_code = sqlite3_prepare_v2(database, sql, -1, &statementTMP, NULL);
if(error_code == SQLITE_OK) {
NSNumber *cidNum; //... move variable declerations outside of loop
NSString *category; //.. so they are not continously recreated
[self.allCategories removeAllObjects]; //... clears the mutable dictionary instead of replacing it
while(sqlite3_step(statementTMP) == SQLITE_ROW){
cidNum=[NSNumber numberWithInt:(sqlite3_column_int(statementTMP, 0))];
category=[NSString stringWithUTF8String:(char *)sqlite3_column_text(statementTMP, 1)];
//... adding the autoreleased category and cidNum to array/dictionary automatically retains them
[self.allCategories addObject:category forKey:cidNum];
[self.cidList addObject:cidNum];
//[category release]; ... no longer needed
//[arr release]; ... no longer needed
}
}
sqlite3_finalize(statementTMP);
sqlite3_close(database);
//self.allCategories = arrayTmp; ... no longer needed
//[arrayTmp release]; ... no longer needed
Use -sortedArrayUsingComparator: (or -sortedArrayUsingFunction:context: if you can't use blocks). Example:
NSDictionary *categories = [self allCategories];
NSArray *keysSortedByValue = [[categories allKeys] sortedArrayUsingComparator:
^(id left, id right) {
id lval = [categories objectForKey:left];
id rval = [categories objectForKey:right];
return [lval compare:rval];
}];
You could make a small model class Category and implement compare inside of it, then sort an array of those objects using that compare:.
Here's some info - How to sort an NSMutableArray with custom objects in it?
Perhaps you're looking for NSSortDescriptor (and the corresponding sort method, -[NSArray sortedArrayUsingDescriptors]) and friends?
If I understood correctly then what you wish to do to get categories from database & display it on a tableView with alphabetical sorting, index on right & search bar on top. Ideally, you would like to display the Contacts application kind of a view. If that's correct, use below code for fetching items from DB & rebuilding (or resetting) it -
const char *sql = "select cid, category from Categories ORDER BY category DESC";
sqlite3_stmt *statementTMP;
NSMutableArray *arrayTmp = [[NSMutableArray alloc] init];
int error_code = sqlite3_prepare_v2(database, sql, -1, &statementTMP, NULL);
if(error_code == SQLITE_OK) {
while(sqlite3_step(statementTMP) == SQLITE_ROW) {
int cid = sqlite3_column_int(statementTMP, 0);
NSString *category = [[NSString alloc] initWithUTF8String:(char *)sqlite3_column_text(statementTMP, 1)];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:category forKey:#"Category"];
[dict setObject:[NSNumber numberWithInt:cid] forKey:#"CID"];
[arrayTmp addObject:dict];
[dict release];
[category release];
}
}
sqlite3_finalize(statementTMP);
sqlite3_close(database);
self.allCategories = arrayTmp;
[arrayTmp release];
And then rebuild the items using this function -
- (void)rebuildItems {
NSMutableDictionary *map = [NSMutableDictionary dictionary];
for (int i = 0; i < allCategories.count; i++) {
NSString *name = [[allCategories objectAtIndex:i] objectForKey:#"Category"];
NSString *letter = [name substringToIndex:1];
letter = [letter uppercaseString];
if (isdigit([letter characterAtIndex:0]))
letter = #"#";
NSMutableArray *section = [map objectForKey:letter];
if (!section) {
section = [NSMutableArray array];
[map setObject:section forKey:letter];
}
[section addObject:[allCategories objectAtIndex:i]];
}
[_items release];
_items = [[NSMutableArray alloc] init];
[_sections release];
_sections = [[NSMutableArray alloc] init];
NSArray* letters = [map.allKeys sortedArrayUsingSelector:#selector(caseInsensitiveCompare:)];
for (NSString* letter in letters) {
NSArray* items = [map objectForKey:letter];
[_sections addObject:letter];
[_items addObject:items];
}
}
Now, displaying items in tableView, use below methods -
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)aTableView {
if (_sections.count)
return _sections.count;
else
return 1;
}
- (NSInteger)tableView:(UITableView*)tableView sectionForSectionIndexTitle:(NSString *)title
atIndex:(NSInteger)index {
if (tableView.tableHeaderView) {
if (index == 0) {
[tableView scrollRectToVisible:tableView.tableHeaderView.bounds animated:NO];
return -1;
}
}
NSString* letter = [title substringToIndex:1];
NSInteger sectionCount = [tableView numberOfSections];
for (NSInteger i = 0; i < sectionCount; i++) {
NSString* section = [tableView.dataSource tableView:tableView titleForHeaderInSection:i];
if ([section hasPrefix:letter]) {
return i;
}
}
if (index >= sectionCount) {
return sectionCount-1;
} else {
return index;
}
}
- (NSArray*)lettersForSectionsWithSearch:(BOOL)withSearch withCount:(BOOL)withCount {
if (isSearching)
return nil;
if (_sections.count) {
NSMutableArray* titles = [NSMutableArray array];
if (withSearch) {
[titles addObject:UITableViewIndexSearch];
}
for (NSString* label in _sections) {
if (label.length) {
NSString* letter = [label substringToIndex:1];
[titles addObject:letter];
}
}
if (withCount) {
[titles addObject:#"#"];
}
return titles;
} else {
return nil;
}
}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
return [self lettersForSectionsWithSearch:YES withCount:NO];
}
- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section {
if (_sections.count) {
NSArray* items = [_items objectAtIndex:section];
return items.count;
} else {
return _items.count;
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if (_sections.count)
return [_sections objectAtIndex:section];
return nil;
}
- (id)tableView:(UITableView *)tableView objectForRowAtIndexPath:(NSIndexPath *)indexPath {
if (_sections.count) {
NSArray *section = [_items objectAtIndex:indexPath.section];
return [section objectAtIndex:indexPath.row];
} else {
return [_items objectAtIndex:indexPath.row];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Create your UITableViewCell.
// Configure the cell.
NSDictionary *dict = [self tableView:tableView objectForRowAtIndexPath:indexPath];
cell.textLabel.text = [dict objectForKey:#"Category"];
cell.detailTextLabel.text = [NSString stringWithFormat:%d, [[dict objectForKey:#"CID"] intValue]];
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
if (isSearching)
return nil;
NSString *title = #"";
if (_sections.count) {
title = [[_sections objectAtIndex:section] substringToIndex:1];
} else {
return nil;
}
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 20)];
view.backgroundColor = [UIColor colorWithRed:(58/255.0) green:(27/255.0) blue:(6/255.0) alpha:1.0];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 1, 50, 18)];
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont boldSystemFontOfSize:17.0];
label.text = title;
[view addSubview:label];
[label release];
return [view autorelease];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *dict = [self tableView:tableView objectForRowAtIndexPath:indexPath];
NSLog(#"selected row id:%d, name:%#", [dict objectForKey:#"Category"], [[dict objectForKey:#"CID"] intValue]);
}
The rest part is implementing the UISearchBarDelegate and implementing searching of tableView which can be done using below code:
- (void)searchBar:(UISearchBar *)searchbar textDidChange:(NSString *)searchText {
[_sections removeAllObjects];
[_items removeAllObjects];
if([searchText isEqualToString:#""] || searchText == nil) {
[self rebuildItems];
return;
}
NSInteger counter = 0;
for(NSDictionary *dict in allCategories) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSRange r = [[dict objectForKey:#"Category"] rangeOfString:searchText options:NSCaseInsensitiveSearch];
if(r.location != NSNotFound) {
if(r.location == 0) {
[_items addObject:dict];
}
}
counter++;
[pool release];
}
[contactList reloadData];
}
Hope this is what you're looking for.
On your sorting function u should try this:
NSArray *cntxt; //im not sure this is the correct type that ur using on keyArray
[keyArray addObjectsFromArray:[self.allCategories allKeys]];
[keyArray sortUsingFunction:compareFunction context:cntxt];
And the compare function you modify to your needs
NSInteger compareFunction(id x, id y, void *context) {
//NSArray *ctxt = context;
NSArray *c1 = x;
NSArray *c2 = y;
if ([c1 value] < [c2 value])
return NSOrderedDescending;
else if ([c1 value] > [c2 value])
return NSOrderedAscending;
else
return NSOrderedSame;
}
Edit: After reading your comments and after relooking at your code, it seems like that your keyArray as objects of the type NSString, so you should change:
NSInteger compareFunction(id x, id y, void *context) {
//NSString *ctxt = context;
NSString *c1 = x;
NSString *c2 = y;
NSComparisonResult result;
result = [c1 compare:c2];
if (result<0)
return NSOrderedAscending;
else if (result>0)
return NSOrderedDescending;
else
return NSOrderedSame;
}