Make an array equal to another array for specific objects - ios

Question

What I'm trying to do is to make an array equal to another but for specific objects. Like the second array holds a lot of objects and I want the first array to take specific objects from the second array and then return it in NumberOfRowsInSection.
Here is what I tried but it returns nothing:
-(NSInteger) tableView: (UITableView * ) tableView numberOfRowsInSection: (NSINteger) section {
NSArray *array;
NSString * foundString;
NSInteger i;
for (i = 0; i < [LabelFilesArray count]; i++) {
if ([[[LabelFilesArray objectAtIndex: i] objectForKey: #"teamSide"] isEqualToString: #"test2"]) {
array = [LabelFilesArray objectAtIndex: i] ObjectForKey: #"teamSide"]; //Here is my problem.
foundString = #"found";
if ([foundString isEqualToString: #"found"]) {
break;
}
}
}
return array.count; //it returns nothing
}

Answer 1

You need to keep things simple, so select the data you want in your tableview as soon as you get it, and store it in a 3rd array.
This allows you to delete and re-arrange rows and makes your datasource methods simple.
ViewController.m:
#interface ViewController()
{
NSMutableArray *_tableData;
}
- (void)methodThatGetsData
{
// Get data in LabelFilesArray
_tableData = [NSMutableArray new];
for (NSDictionary *dict in LabelFilesArray) {
for (NSString *filter in _filterArray) {
if (dict[#"teamSide"] isEqualToString:filter]) {
[_tableData addObject:dict];
break;
}
}
}
[_tableView reloadData];
}
-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection: (NSINteger)section {
[_tableData count];
}
// etc.

Answer 2

You can use NSPredicate also to filter contents of array.
Example:
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"%K = %#", key, [dict objectForKey:key]];
_filterArray = [LabelFilesArray filteredArrayUsingPredicate:predicate];