How to pass value of db to auto complete text filed? - iphone

Question

I created auto complete text box my problem is that how to pass array is stored value which is retrive from db
When use _category detail my app will crash .
if i'm using NSArray with objects there is no problem.
When I debug code i found problem in search method plz help to solve my problem
Thank you so much
My function
- (void)viewDidLoad
{
self.categoryDetail = [CompanyDetailDatabase database].categoryDetail;
NSMutableArray *arrt = [[NSMutableArray alloc]init];
//arrt = [NSMutableArray arrayWithArray:_categoryDetail];
arrt=[NSArray arrayWithArray:_categoryDetail];
self.pastUrls = [[NSMutableArray alloc]initWithArray:arrt];
// self.pastUrls = [[NSMutableArray alloc] initWithObjects:#"Hello1",#"Hello2",#"Hello3", nil];
self.autocompleteUrls = [[NSMutableArray alloc] init];
autocompleteTableView = [[UITableView alloc] initWithFrame:CGRectMake(20, 180, 280, 50) style:UITableViewStylePlain];
autocompleteTableView.delegate = self;
autocompleteTableView.dataSource = self;
autocompleteTableView.scrollEnabled = YES;
autocompleteTableView.hidden = YES;
[self.view addSubview:autocompleteTableView];
[txtProduct setDelegate:self];
}
- (void)searchAutocompleteEntriesWithSubstring:(NSString *)substring {
// Put anything that starts with this substring into the autocompleteUrls array
// The items in this array is what will show up in the table view
[autocompleteUrls removeAllObjects];
for(NSString *curString in pastUrls)
{
NSRange substringRangeLowerCase = [curString rangeOfString:[substring lowercaseString]];
NSRange substringRangeUpperCase = [curString rangeOfString:[substring uppercaseString]];
if (substringRangeLowerCase.length !=0 || substringRangeUpperCase.length !=0)
{
[autocompleteUrls addObject:curString];
}
}
autocompleteTableView.hidden =NO;
[autocompleteTableView reloadData];
}
#pragma mark UITextFieldDelegate methods
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
autocompleteTableView.hidden = NO;
NSString *substring = [NSString stringWithString:textField.text];
substring = [substring stringByReplacingCharactersInRange:range withString:string];
[self searchAutocompleteEntriesWithSubstring:substring];
return YES;
}
#pragma mark UITableViewDataSource methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) section {
return autocompleteUrls.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = nil;
static NSString *AutoCompleteRowIdentifier = #"AutoCompleteRowIdentifier";
cell = [tableView dequeueReusableCellWithIdentifier:AutoCompleteRowIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault reuseIdentifier:AutoCompleteRowIdentifier] autorelease];
}
cell.textLabel.text = [autocompleteUrls objectAtIndex:indexPath.row];
return cell;
}
#pragma mark UITableViewDelegate methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
txtProduct.text = selectedCell.textLabel.text;
}
Now view of scene image

Answer 1

I'm not sure about your methods. But, it is very simple to achieve. First you've to insert some records in your database table. And, while editing on your UITextField you have to pass the text to your database table as sqlite query with your conditions and returns as NSArray or NSMutableArray Some code snippets -
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if (textField == listTableView)
{
recordsArray = [self getRecords:string];
if ([recordsArray count] == 0 || recordsArray == NULL)
{
[[[UIAlertView alloc] initWithTitle:nil message:#"No Records Were found" delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:nil, nil] show];
}
else
{
tableV.hidden = NO;
[tableV reloadData];
}
}
return YES;
}
Above will get your typed string and pass to database method named as getRecords with typed string.
-(NSMutableArray*)getRecords:(NSString *)srchString
{
NSMutableArray *mutArray = [[NSMutableArray alloc]init];
sqlite3 *servicesDB;
NSString *filePath=[AppDelegate dbPath];
if(sqlite3_open([filePath UTF8String], &servicesDB) == SQLITE_OK)
{
NSString *sqlStatement;
sqlStatement = [NSString stringWithFormat:#"SELECT * FROM Records WHERE record = '%%%#%%'", srchString];
const char *sql = [sqlStatement UTF8String];
sqlite3_stmt *select_statement;
if (sqlite3_prepare_v2(servicesDB, sql, -1, &select_statement, nil) == SQLITE_OK)
{
while (sqlite3_step(select_statement) == SQLITE_ROW)
{
char *record = (char *)sqlite3_column_text(select_statement, 0);
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:[NSString stringWithUTF8String:record] forKey:#"record"];
[mutArray addObject:[dict copy]];
}
}
else
{
NSLog(#"Error while fetching data. '%s'", sqlite3_errmsg(servicesDB));
}
sqlite3_finalize(select_statement);
}
sqlite3_close(servicesDB);
return mutArray;
}
Above database method will execute and fetch the data which are all having word whatever you're typed. You can find the details about LIKE clause here
You'll get your final result once the executions are completed. Simply find a sample project here