Search more than 1000 queries in parse iOS - ios

Question

I have a parse iOS app where I need to search the names of a couple thousand users (~3,000). I am trying to modify my search code so that I can do this but I need help. Right now my code for search looks like this:
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (tableView == self.tableView) {
return self.objects.count;
} else {
return self.searchResults.count;
}
}
-(void)filterResults:(NSString *)searchTerm :(int)limit :(int)skip {
[self.searchResults removeAllObjects];
PFQuery *query = [PFQuery queryWithClassName:#"_User"];
[query whereKey:#"isTeacher" equalTo:#"False"];
[query setLimit: limit];
[query setSkip: skip];
[[[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (objects.count == limit) {
[self performTeacherQueryWithLimit:limit andSkip:skip+limit];
}
else{
NSArray *results = [NSArray arrayWithArray:objects];
NSLog(#"%#", results);
NSLog(#"%lu", (unsigned long)results.count);
NSLog(#"results^");
[self.searchResults addObjectsFromArray:results];
NSPredicate *searchPredicate =
[NSPredicate predicateWithFormat:#"SELF.name contains[c] %#",searchTerm];
_searchResults = [NSMutableArray arrayWithArray:[results filteredArrayUsingPredicate:searchPredicate]];
[self.searchDisplayController.searchResultsTableView reloadData];
NSLog(#"%#", _searchResults);
NSLog(#"%lu", (unsigned long)_searchResults.count);
NSLog(#"search results^");
}
}];
]]
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self filterResults:searchString];
return YES;
}
This code will not work because I call the filterResults at the bottom without all the correct parameters but that is because I got halfway through and now I am stuck. I know I need to use the setSkip but I'm not sure how to make that work for my searching. Any help would be awesome! Thanks!

Answer 1

I do this sort of thing with a method that handles the query and its results together, like this:
- (void)runQuery:(PFQuery *)query filling:(NSMutableArray *)array completion:(void (^)(BOOL))completion {
query.skip = array.count;
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
[array addObjectsFromArray:objects];
if (objects.count < query.limit) {
return completion(YES);
} else {
[self runQuery:query filling:array completion:completion];
}
} else {
return completion(NO);
}
}];
}
Use it like this:
PFQuery *query = [PFQuery queryWithClassName:#"MyClass"];
// setup query
query.limit = // set this to a reasonable size
// the given method will do ceil(N / limit) finds, where N is the number
// of rows that satisfy the query
NSMutableArray *array = [#[] mutableCopy];
[self runQuery:query filling:array completion:^(BOOL success) {
NSLog(#"%#", array);
// you would do your local search and set search results here
}];
A more functional version would call a progress block in between queries. This would allow you to continuously update results. For that, just add a progress block parameter and call it right after [array addObjectsFromArray:objects];.