在字典数组中搜索并在表视图中显示数据

Question

I have an array of dictionaries where I what to implement search functionality and display data on tableView cells.

Search works quite fine, I have tested it:

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {

    NSString *dictionryKey = @"eViela";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K CONTAINS [cd] %@", dictionryKey, searchText];
    NSArray *filteredArray = [self.allItems filteredArrayUsingPredicate:predicate];
    NSLog(@"%@", filteredArray);

    self.sortedText = filteredArray;

    [self.tableView reloadData];

}

Now I need tableView to fill data only for key "eViela" while user is typing info in search bar. As of now I can show only all items as per below code:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SearchCell" forIndexPath:indexPath];
    EvielasLibrary *library = [[EvielasLibrary alloc] init];
    cell.textLabel.text = [[library.library objectAtIndex:indexPath.row] 
    return cell;
}

I know that it should be easy but I can't figure it out.

Thanks for help!

Answer 1

You need to get Model from array instead of create new one .

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SearchCell" forIndexPath:indexPath];
    EvielasLibrary *library = [self.sortedText objectAtIndex:indexPath.row]; // assume that  self.sortedText is your data source array of tableview
    cell.textLabel.text = @"" // populate your string here  
    return cell;
}

Answer 2

NSMutableArray *arrayForTableView = [[NSMutableArray alloc] init];
NSString *dictionryKey = @"eViela";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@",dictionryKey];
NSArray *filteredArray = [self.allItems filteredArrayUsingPredicate:predicate];
for (NSInteger i = 0; i<filteredArray.count; i++){
    NSString *matchValue = [NSString stringWithFormat:@"%@",[filteredArray objectAtIndex:i]];
    if ([matchValue isEqualToString:dictionryKey]){
        [arrayForTableView addObject:matchValue];
    }
}

Use arrayForTableView array for your tableview

cell.textLabel.text = [arrayForTableView objectAtIndex:indexPath.row];

Answer 3

Problem is that you not updating numberOfRowsInSection delegate method for sortedArray

You need to check if search bar is active or not. if search bar is active then use sortedText array else if search bar is not active then use library.library array

For check search bar active create a global variable isSearchBarActive And assign it true value in searchBarTextDidBeginEditing delegate function and assign false in searchBarTextDidEndEditing

Add Condition in numberOfRowInSection

if searchBarActive {
    return self.sortedText.count
}
else {
    return library.library.count
}

Add Condition in cellForRowAtIndexPath like this

if searchBarActive {
    cell.textLabel.text = [self.sortedText objectAtIndex:indexPath.row] 
}
else {
    cell.textLabel.text = [library.library objectAtIndex:indexPath.row] 
}