I am trying to add search bar to search through my tableView. There is only one TableViewController in which searchBar is added. I checked all existing guides and apple example codes and followed the instructions but somehow my tableView is not reloaded after entering search string. I checked my codes with NSLog, and I'm sure the the search text is correctly uploaded and and the new array is filtered using NSPredicate.I have added [self.tableView reloadData] at the end of "updateSearchResultsForSearchController:" method but still my tableViewController is not updated. I am new to iOS programming and not sure what i am doing wrong. Appreciate if you can have a quick glance on my codes and feedback to me. Here is the summary :
@property (nonatomic,strong) UISearchController *searchController;
@property (nonatomic,strong) NSArray *myList; //original data list
@property (nonatomic,strong) NSArray *mysearchResult; //filtered list
- (void)viewDidLoad {
[super viewDidLoad];
self.searchController=[[UISearchController alloc]initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater=self;
self.searchController.dimsBackgroundDuringPresentation=NO;
self.searchController.searchBar.delegate=self;
self.tableView.tableHeaderView=self.searchController.searchBar;
self.definesPresentationContext=YES;
[self.searchController.searchBar sizeToFit];
}
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {
NSString *searchString=self.searchController.searchBar.text;
NSPredicate *mypredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@", searchString];
self.mysearchResult=[self.myList filteredArrayUsingPredicate:mypredicate];
[self.tableView reloadData];
}
"CellForRowAtIndexPath" method for tableView codes:(similarly "numberOfRowsInSection" is updated)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MyCustomCell codes.....
if (tableView==self.tableView) {
cell.cellLabel.text=[self.myList objectAtIndex:indexPath.row];
} else
cell.cellLabel.text=[self.mysearchResult objectAtIndex:indexPath.row];
return cell;
}
For first time before populating the tableView use mysearchResult
instead of myList
. At this point data in both arrays should be same.
self.mysearchResult = [[NSArray alloc] initWithArray:myList];
Now after using predicate you are updating your mysearchResult
that's fine. While you cancel search again populate your mysearchResult
from myList
which actually contains all your original data.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
[self.mysearchResult count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MyCustomCell codes.....
//Remove your If condition from here
cell.cellLabel.text=[self.mysearchResult objectAtIndex:indexPath.row];
return cell;
}