search bar for tableview - ios

Question

I need to add a search bar for a table view.Table contain "Names" which is actually stored in inside an object called "patient".I have an array of "patient" objects.
So to setup a search bar to search for names.But how to do it using NSPredicate?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString* CellId= #"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellId];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellId] ;
}
cell.accessoryType = UITableViewCellAccessoryNone;
ObjPatient = [allPatientDetails objectAtIndex:indexPath.row];
cell.textLabel.text =[NSString stringWithFormat:#"%# %#",ObjPatient.firstName,ObjPatient.lastName];
return cell;
}
Above is the code to show the names on table.
Any suggestions are welcome , Thanks

Answer 1

To Implement search functionality first take look into below links -
https://developer.apple.com/library/ios/documentation/uikit/reference/UISearchBar_Class/Reference.html
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSPredicate_Class/Reference/NSPredicate.html
Then make changes in your code as follows -
In your .h file declare array -
NSArray *filteredArray;
In - (void)viewDidLoad method -
filteredArray = allPatientDetails;
Then implement UISearchBar delegate method-
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
NSPredicate *predicate = [NSPredicate
predicateWithFormat:#"SELF.firstName contains[c] %#",
searchText];
NSArray *filteredArray = [allPatientDetails filteredArrayUsingPredicate:predicate];
[tableView reloadData];
}
and make changes in your existing method -
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString* identifier= #"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] ;
}
cell.accessoryType = UITableViewCellAccessoryNone;
ObjPatient = [filteredArray objectAtIndex:indexPath.row];
cell.textLabel.text =[NSString stringWithFormat:#"%# %#",ObjPatient.firstName,ObjPatient.lastName];
return cell;
}

Answer 2

well for nspredicate with custom object can be done like this.
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"SELF.firstName contains[c] %#",
searchText];
self.searchedMemberNameResults = [self.listedMembers filteredArrayUsingPredicate:resultPredicate];
firstName is attribute of an object

Answer 3

Below you can find code for searching an item based on the label in the storyboard. It searches dynamically; I've tested this and it's working.
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"job_id contains[c] %#",searchText];
searchResultArray = [responceArray filteredArrayUsingPredicate:resultPredicate];
[jobsTable reloadData];
}