How to Search Array of Dictionary and show in UITableview?

问题

I am pretty new in IOS and I am using UISearchDisplayController for searching.

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

    return YES;
}

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY SELF == %@", searchText];
    NSArray *filtered = [self.arrProductList filteredArrayUsingPredicate:predicate];
    NSLog(@"%@", filtered);
}

And Here is my self.arrProductList is an array of array i.e

    ({
        ID = 1;
        description = "Coalesce Functioning on impatience T-Shirt";
        pname = "Coalesce Functioning T-Shirt";
        price = "299.00";
        qty = 99;
       },
    {
        ID = 2;
        description = "Eater Krylon Bombear Destroyed T-Shirt";
        pname = "Girl's T-Shirt";
        price = "499.00";
        qty = 99;
    },
    {
        ID = 3;
        description = "The Get-up Kids Band Camp Pullover Hoodie";
        pname = "Band Camp T-Shirt";
        price = "399.00";
        qty = 99;
    })

My question is how to search using key "pname"? My app is Crashed in

filteredArrayUsingPredicate:

回答1:

You need to modify your predicate to add the key to look for:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"pname == %@", searchText];

Additionally == will actually look for exact matches, ie if you'll enter Band Camp T-Shirt as search then you'll get the result, you won't be able to get any result if you simply enter Band or Camp or Shirt. So in order to achieve the character based search, you need to modify predicate to include contain keyword.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"pname contains[cd] %@", searchText];

[cd] will match with case insensitive.

回答2:

My friend solve this issue. Here, is the code:

- (void) searchBarDidBeginEditing:(UISearchBar*) lclSearchBar
{
    self.searchBar.showsCancelButton = YES;
}
#pragma mark - UISearchDisplayController delegate methods
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{

    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];

    return YES;
}

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    if (searchResults.count != 0) {
        [searchResults removeAllObjects];
    }
    for (int i=0; i< [self.arrProductList count]; i++)
    {
        NSString *string = [[self.arrProductList objectAtIndex:i] valueForKey:@"pname"];
        NSRange rangeValue = [string rangeOfString:searchText options:NSCaseInsensitiveSearch];
        if (rangeValue.length > 0)
        {
            NSLog(@"string contains bla!");

            [searchResults addObject:[self.arrProductList objectAtIndex:i]];
        }
        else
        {
            NSLog(@"string does not contain bla");
        }
    }
    NSLog(@"fiilterArray : %@",searchResults);
}

来源：https://stackoverflow.com/questions/31339298/how-to-search-array-of-dictionary-and-show-in-uitableview

标签

ios

objective-c

arrays

uitableview

uisearchdisplaycontroller