How to add object to NSArray with key from database?

Question

i am using FMDatabase class to open database, its work ok, my problem is how to add object with key to NSArray, see this code

@implementation ViewController  {

    NSArray *allDevices;
    NSArray *searchResult;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    FMDatabase *db = [FMDatabase databaseWithPath:[[[NSBundle mainBundle]
                                    resourcePath] stringByAppendingPathComponent:@"db.sqlite"]];
    [db open];

    FMResultSet *results = [db executeQueryWithFormat:@"select * from allDevices"];

    NSString *name; NSString *company;

    while ([results next]) {

        name = [results stringForColumn:@"name"];
        company = [results stringForColumn:@"company"];

        allDevices = @[
                       @{@"name": name, @"company": company}
                       ];
    }


    [db close];



}

tableView..

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [searchResult count];

    } else {
        return [allDevices count];

    }

   }

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {

        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
    }



    NSDictionary *device;

    if ([self.searchDisplayController isActive]) {
        device = searchResult[indexPath.row];

    } else {
        device = allDevices[indexPath.row];
    }

    NSString *name = device[@"name"];
    NSString *company = device[@"company"];
    cell.textLabel.text = [NSString stringWithFormat:@"%@ - %@", name, company];


    return cell;
}

search code

#pragma mark - UISearchDisplayController delegate methods

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{

    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"name contains[cd] %@", searchText];

    searchResult = [allDevices filteredArrayUsingPredicate:resultPredicate];

}



-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];

    return YES;
}

its working well when i add objects to array manually, like this

   allDevices = @[
                   @{@"name": @"iPhone", @"company": @"Apple"},
                   @{@"name": @"Galaxy", @"company": @"Samsung"},
                   @{@"name": @"iPad", @"company": @"Apple"},
                   ];

NSDictionary is meant for Key-Value coding in iOS, not the NSArray. — βhargavḯ
– βhargavḯ, Commented Nov 23, 2013 at 5:47
You can create NSDictionary with name and company key value pair, and then add dictionary to array. — Bhumeshwer katre
– Bhumeshwer katre, Commented Nov 23, 2013 at 5:50
i am using this array in tableview and searching in it with filteredArrayUsingPredicate and its not working with NSDictionary — Almudhafar
– Almudhafar, Commented Nov 23, 2013 at 5:54

Almudhafar · Accepted Answer · 2013-11-24 09:53:23Z

4

i found it,

thanks

 [allDevices addObjectsFromArray:[NSArray arrayWithObjects:[NSMutableDictionary dictionaryWithObjects:
                                    [NSArray arrayWithObjects: rowID, name, company, nil]
                            forKeys:[NSArray arrayWithObjects: @"rowID", @"name", @"company", nil]], nil]];

answered Nov 24, 2013 at 9:53

Almudhafar

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Comments

Community · Accepted Answer · 2017-05-23 12:15:36Z

1

Have a look at NSMutableDictionary.

You can do something like this:

NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject: obj forKey: @"yourKey"];

where obj is the object you want to store.

Also see this post about conversion from NSDictionary to NSArray.

edited May 23, 2017 at 12:15

CommunityBot

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answered Nov 23, 2013 at 5:57

Goran

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