I am wondering how to get my get the different case letters to go into the same sections...
I pass my parsed data over to a custom method that takes the array and creates the section letters as shown bellow.. I'm just not sure how to make it so that capital and non capital letters appear in the same sections and was hoping for some help.
//method to sort array and split for use with uitableview Index
- (IBAction)startSortingTheArray:(NSArray *)arrayData
{
//If you want the standard array use this code
sortedArray = arrayData;
self.letterDictionary = [NSMutableDictionary dictionary];
sectionLetterArray = [[NSMutableArray alloc] init];
//Index scrolling Iterate over values for future use
for (NSString *value in sortedArray)
{
// Get the first letter and its associated array from the dictionary.
// If the dictionary does not exist create one and associate it with the letter.
NSString *firstLetter = [value substringWithRange:NSMakeRange(0, 1)];
NSMutableArray *arrayForLetter = [letterDictionary objectForKey:firstLetter];
if (arrayForLetter == nil)
{
arrayForLetter = [NSMutableArray array];
[letterDictionary setObject:arrayForLetter forKey:firstLetter];
[sectionLetterArray addObject:firstLetter]; // This will be used to set index scroller and section titles
}
// Add the value to the array for this letter
[arrayForLetter addObject:value];
}
//Reload data in table
[self.tableView reloadData];
}
this is what it looks like atm..
The simplest solution is to always store just the uppercase (or lowercase) version of the first letter. So you could do something like:
NSString *firstLetter = [[value substringWithRange:NSMakeRange(0, 1)] uppercaseString];
Related
I'm displaying an array of contacts ( [[ContactStore sharedStore]allContacts] ) in a tableview and have divided the list into alphabetic sections. I have used the following code to return an array of the first letters of the contacts, and a dictionary of the number of entries per letter.
//create an array of the first letters of the names in the sharedStore
nameIndex = [[NSMutableArray alloc] init];
//create a dictionary to save the number of names for each first letter
nameIndexCount = [[NSMutableDictionary alloc]init];
for (int i=0; i<[[[ContactStore sharedStore]allContacts]count]; i++){
//Get the first letter and the name of each person
Contact *p = [[[ContactStore sharedStore]allContacts]objectAtIndex:i];
NSString *lastName = [p lastName];
NSString *alphabet = [lastName substringToIndex:1];
//If that letter is absent from the dictionary then add it and set its value as 1
if ([nameIndexCount objectForKey:alphabet] == nil) {
[nameIndex addObject:alphabet];
[nameIndexCount setValue:#"1" forKey:alphabet];
//If its already present add one to its value
} else {
NSString *newValue = [NSString stringWithFormat:#"%d", ([[nameIndexCount valueForKey:alphabet] intValue] + 1)];
[nameIndexCount setValue:newValue forKey:alphabet];
}
}
This works, however it is very slow when the array is large, I'm sure there's a better way to do this but I'm quite new to this so am not sure how. Are there any suggestions for a better way to do this?
Although Bio Cho has a good point, you might see an increase in performance by calling
[[ContactStore sharedStore]allContacts]
only once. For example:
nameIndex = [[NSMutableArray alloc] init];
nameIndexCount = [[NSMutableDictionary alloc] init];
/*
Create our own copy of the contacts only once and reuse it
*/
NSArray* allContacts = [[ContactStore sharedStore] allContacts];
for (int i=0; i<[allContacts count]; i++){
//Get the first letter and the name of each person
Contact *p = allContacts[i];
NSString *lastName = [p lastName];
NSString *alphabet = [lastName substringToIndex:1];
//If that letter is absent from the dictionary then add it and set its value as 1
if ([nameIndexCount objectForKey:alphabet] == nil) {
[nameIndex addObject:alphabet];
[nameIndexCount setValue:#"1" forKey:alphabet];
//If its already present add one to its value
} else {
NSString *newValue = [NSString stringWithFormat:#"%d", ([[nameIndexCount
valueForKey:alphabet] intValue] + 1)];
[nameIndexCount setValue:newValue forKey:alphabet];
}
}
Though I can't say for sure, I'd guess that repeatedly accessing your shared store is what's killing you. Maybe only accessing it once will give you what you need.
Consider storing your contacts in Core Data and using an NSFetchedResultsController.
The NSFetchedResultsController will only load a subset of the rows which are visible on the table view, thus preventing your user from having to wait for all the contacts to be sorted.
NSFetchedResultsController will also sort your contacts by an attribute (ie. first or last name), and you can set your section titles to be the first letter of the field you're sorting by.
Take a look at this question and this tutorial.
I'm trying to implement a searchable tableview in my app, where when someone can search a location and get results. It looks something like this:
I'm getting my source from genomes.com which gives more then just cities, it also has parks, buildings, counties, etc. I want to just show locations which are cities.
The data is a JSON file which is parsed by JSONKit. The whole file comes in (maximum 20 objects) and then the searchable table view shows it. I'm not sure if I should parse the JSON file differently, or if I should make the table view show only the results needed. (Performance in this case is not an issue.). The JSON file gets converted to an NSArray.
Here is part of the array:
{
adminCode1 = MA;
adminCode2 = 027;
adminName1 = Massachusetts;
adminName2 = "Worcester County";
adminName3 = "";
adminName4 = "";
adminName5 = "";
continentCode = NA;
countryCode = US;
countryName = "United States";
elevation = 178;
fcl = A;
fclName = "country, state, region,...";
fcode = ADMD;
fcodeName = "administrative division";
geonameId = 4929431;
lat = "42.2000939";
lng = "-71.8495163";
name = "Town of Auburn";
population = 0;
score = "53.40083694458008";
timezone = {
dstOffset = "-4";
gmtOffset = "-5";
timeZoneId = "America/New_York";
};
toponymName = "Town of Auburn";
},
What I want to do is if the "fcl" (seen in the array) is equal to P, then I want it to show that in the table view. If the "fcl" is some other character, then I don't want it to be seen in the table view. I'm pretty sure that an if statement can do that, but I don't know how to get it so that it filters part of it.
Any help would be appreciated! Thanks
EDIT: As of now, this is the code to search:
- (void)delayedSearch:(NSString*)searchString
{
[self.geoNamesSearch cancel];
[self.geoNamesSearch search:searchString
maxRows:20
startRow:0
language:nil];
}
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
self.searchDisplayController.searchBar.prompt = NSLocalizedStringFromTable(#"ILGEONAMES_SEARCHING", #"ILGeoNames", #"");
[self.searchResults removeAllObjects];
// Delay the search 1 second to minimize outstanding requests
[NSObject cancelPreviousPerformRequestsWithTarget:self];
[self performSelector:#selector(delayedSearch:) withObject:searchString afterDelay:0];
return YES;
}
Your question is basically, how do you filter your array from a search bar string? If so, you can detect when the text changes via UISearchBarDelegate and then go through your array copying those objects that contain the string you are looking for, i.e.
This is the delegate method you want: searchBar:textDidChange:.
[filterArray removeAllObjects];
for(int i = 0; i < [normalArray count]; i++){
NSRange textRange;
textRange =[[[[normalArray objectAtIndex:i] objectForKey:#"name"] lowercaseString] rangeOfString:[searchBarString lowercaseString]];
//I wasn't sure which objectForKey: string you were looking for, just replace the one you want to filter.
if(textRange.location != NSNotFound)
{
[filterArray addObject:[normalArray objectAtIndex:i]];
}
}
filterTableView = YES;
[tableView reloadData];
Note the filterTableView bool value, this is so your tableView knows either to load normally or the filtered version you just made. You implement this in:
tableView:numberOfRowsInSection: //For number of rows.
tableView:cellForRowAtIndexPath: //For the content of the cells.
Hope this is what you were looking for.
NSMutableArray* filtered = [[NSMutableArray alloc] autorelease];
for (int i=0;i<[data count];i++)
{
NSDictionary* item=[data objectAtIndex:i];
if (#"P" == [item objectForKey:#"fcl"] )
{
[filtered addObject:item];
}
}
So every time the search field changes, you will compute a new array, and then reload your tableview. The number of rows will be the numbers of rows in your filtered array.
To compute the new array, you can do this (assuming an array of dictionaries):
NSString *searchString; // from the search field
NSMutableArray *array = [NSMutableArray arrayWithCapacity:[origArray count]];
for(NSDictionary *dict in origArray) {
NSString *val = [dict objectForKey:#"fcl"];
if([val length] >= searchString) {
NSString subString = [val substringToIndex:[searchString length]];
if([subString isEqualToString:val]) [array addObject:dict];
}
}
Each cell then will get its values from the new array.
Just put your json in a NSDictionary and simply do something like :
if ([[yourJson objectForKey:#"fcl"] stringValue] == #"A")
//doSomething
The title pretty much says it all, but just to clarify: I have an NSMutableDictonary containing several NSMutableArrays. What I would like to do is find any value that is present in multiple arrays (there will not be any duplicates in a single array) and return that value. Can someone please help? Thanks in advance!
Edit: For clarity's sake I will specify some of my variables:
linesMutableDictionary contains a list of Line objects (which are a custom NSObject subclass of mine)
pointsArray is an array inside each Line object and contains the values I am trying to search through.
Basically I am trying to find out which lines share common points (the purpose of my app is geometry based)
- (NSValue*)checkForDupes:(NSMutableDictionary*)dict {
NSMutableArray *derp = [NSMutableArray array];
for (NSString *key in [dict allKeys]) {
Line *temp = (Line*)[dict objectForKey:key];
for (NSValue *val in [temp pointsArray]) {
if ([derp containsObject:val])
return val;
}
[derp addObjectsFromArray:[temp pointsArray]];
}
return nil;
}
this should work
If by duplicates you mean returning YES to isEqual: you could first make an NSSet of all the elements (NSSet cannot, by definition, have duplicates):
NSMutableSet* allElements = [[NSMutableSet alloc] init];
for (NSArray* array in [dictionary allValues]) {
[allElements addObjectsFromArray:array];
}
Now you loop through the elements and check if they are in multiple arrays
NSMutableSet* allDuplicateElements = [[NSMutableSet alloc] init];
for (NSObject* element in allElements) {
NSUInteger count = 0;
for (NSArray* array in [dictionary allValues]) {
if ([array containsObject:element]) count++;
if (count > 1) {
[allDuplicateElements addObject:element];
break;
}
}
}
Then you have your duplicate elements and don't forget to release allElements and allDuplicateElements.
i m parsing a json url using SBJSON and everything works fine. the problem is if m to parse the tag "title" or bascially any other tag and store it in an array named story.. i m able to get only the last value containing the tag and not the entire list of values stored in the array named story below is the code..
- (void)viewDidLoad {
[super viewDidLoad];
jsonurl=[NSURL URLWithString:#"http://www.1040communications.net/sheeba/stepheni/iphone/stephen.json"];
jsonData=[[NSString alloc]initWithContentsOfURL:jsonurl];
jsonArray = [jsonData JSONValue];
items = [jsonArray objectForKey:#"items"];
for (NSDictionary *item in items )
{
story = [NSMutableArray array];
description1 = [NSMutableArray array];
[story addObject:[item objectForKey:#"title"]];
[description1 addObject:[item objectForKey:#"description"]];
}
NSLog(#"booom:%#",story);}
The story and description1 should be declared before the loop starts.
This line should be outside the for loop
story = [NSMutableArray array];
The NSMutableArray is being created for every item in your dictionary and hence you are getting the last value only. So you need to create the dictionary before you enter the for loop.
My iPhone application has a UITable View implemented with search functionality in it. The values in the table are grouped into sections from A-Z. Whenever a user tap on particular cell in the table it loads a detail view controller which gives all the values of that particular user. Now my problem is whenever I search some contact and tap on a particular user to check his detail view it always returns a contact starting with letter A. So, my doubt is how to implement this search functionality. Is there a way to get the name of the contact I tapped..Please check this screenshot.. For example if I search some contact starting with letter 'B' and tap on that contact it loads the detail view of a contact starting with letter 'A'. I get all the values from the database. Can you please help me out...
This is the code:
The code I wrote here is in a method:
I am getting all the contacts from database and assigning to an array contacts. Then I am grouping all the contacts according to the alphabets and grouping everything into a dictionary with keys as A-Z and values as name of contacts starting with these letters. Now when I search for a particular contact his name may start with either A ,B or Z..so in the search bar when I search for a particular contact for example a contact starting with letter Z, in this case it gives the details of a person with A. I want this to change so that whenever I tap on a particular contact it should load its details. I am unable to figure out how to do it..
contacts = [[db getContacts:#"Contacts"] componentsSeparatedByString:#","];
[db cleanup];
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
NSString *charString;
for (int i=65; i<91; i++) {
charString = [NSString stringWithFormat:#"%c",(char *)i];
[tempArray addObject:charString];
}
[charString release];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
for (int i=0; i<[tempArray count]; i++) {
NSMutableArray *contactsByIndex = [[[NSMutableArray alloc] init]autorelease];
NSString *tempChar = [tempArray objectAtIndex:i];
for (int j=0; j<[contacts count]-1; j++)
{
NSString *test = [contacts objectAtIndex:j];
NSString *tempString = [test substringToIndex:1];
if ([tempString isEqualToString:tempChar]) {
[contactsByIndex addObject:[contacts objectAtIndex:j]];
}
}
[dict setObject:contactsByIndex forKey:[tempArray objectAtIndex:i]];
}
self.contactNames = dict;
NSArray *array = [[contactNames allKeys] sortedArrayUsingSelector:#selector(caseInsensitiveCompare:)];
self.contactKeys = array;
[dict release];
[tempArray release];
//---display the searchbar---
self.tableView.tableHeaderView = searchBar;
searchBar.autocorrectionType = UITextAutocorrectionTypeYes;
listOfContacts = [[NSMutableArray alloc] init];
for (NSString *key in array)
{
NSArray *contactsArray = [contactNames objectForKey:key];
for (NSString *name in contactsArray) {
[listOfContacts addObject:name];
}
}
- (void) searchContactsTableView {
//---clears the search result---
[searchResult removeAllObjects];
for (NSString *str in listOfContacts) {
NSRange titleResultsRange = [str rangeOfString:searchBar.text options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0)
[searchResult addObject:str];
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here. Create and push another view controller.
NSString *selectedRow=nil;
if (isSearchOn) {
selectedRow=[searchResult objectAtIndex:indexPath.row];
}
DetailViewController *detailViewController;
int section_index=[indexPath indexAtPosition:[indexPath length]-2];
int sugarid_Index = [indexPath indexAtPosition: [indexPath length]-1];
NSString* sectionName=[contactKeys objectAtIndex:section_index];
NSLog(#"%#",sectionName);
//This is a method which gets the details of a particular contact based on the section and the row selected..Contacts is the table name
NSString *getContact=[db getId:#"Contacts" bySection:sectionName andIndex:sugarid_Index];
id=[db getContact:#"Contacts" id:getContact];
// Pass the selected object to the new view controller.
detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
detailViewController.eachContact=contactForSugarId;
[self.navigationController pushViewController:detailViewController animated:YES];
}
When I search for a contact it should search for the name in database and should return its details. Is there a way to do it..please let me know or is there a way to get the name of the cell i.e. the contact name so that I can use that in one of my database methods to retrieve the details of the contact I selected.
Off hand it sounds like you're looking in the wrong array of contacts after the search. You need to have two arrays. One with all the contacts, and one with the filtered contacts. When you search, put all the results in order in the filtered list, and pull the details from that one.
Does this make sense?
If not, try posting a bit of code, and explaining your structure.