搜索功能解析IOS

Question

我想做一个搜索功能，查询来自同一类的两个不同的键。我可以使用哪种正则表达式返回最准确的值。例如：

- (void)searchTableList { 

[self.results removeAllObjects]; 

PFQuery *query = [PFQuery queryWithClassName:@"TC"]; 


CLLocationCoordinate2D coordinate = [self.delegate.location coordinate]; 
PFGeoPoint *geoPoint = [PFGeoPoint geoPointWithLatitude:coordinate.latitude 
               longitude:coordinate.longitude]; 

PFQuery *query1 = [PFQuery queryWithClassName:@"TC"]; 

[query1 setLimit:1000]; 
[query1 whereKey:@"location" 
    nearGeoPoint:geoPoint 
withinKilometers:5]; 
    [query1 whereKey:@"courses" matchesRegex:[NSString stringWithFormat:@"%@",[self.searchBar.text lowercaseString]]]; 

[query1 whereKey:@"owner" notEqualTo:[PFUser currentUser].username]; 
[query1 findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) { 
    for(PFObject * object in objects) 
    { 
     [self.results addObject:object]; 
    } 
[query setLimit:1000]; 
[query whereKey:@"location" 
    nearGeoPoint:geoPoint 
    withinKilometers:5]; 
    [query whereKey:@"owner" matchesRegex:[NSString stringWithFormat:@"%@",[self.searchBar.text lowercaseString]]]; 

    [query whereKey:@"owner" notEqualTo:[PFUser currentUser].username]; 
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) { 
    for(PFObject * object in objects) 
    { 
     [self.results addObject:object]; 
    } 


    [self.tableView reloadData]; 
}]; 


}]; 
} 

我该如何处理这两个查询并按照最精确的信息优先的方式进行排序。

Answer 1

如果要查找与某个查询匹配的对象，可以使用或QueryWithSubqueries：方法。例如，如果你想找到拥有大量胜利或少数胜利的玩家，你可以这样做：

PFQuery *lotsOfWins = [PFQuery queryWithClassName:@"Player"]; 
[lotsOfWins whereKey:@"wins" greaterThan:@150]; 

PFQuery *fewWins = [PFQuery queryWithClassName:@"Player"]; 
[fewWins whereKey:@"wins" lessThan:@5]; 
PFQuery *query = [PFQuery orQueryWithSubqueries:@[fewWins,lotsOfWins]]; 
[query findObjectsInBackgroundWithBlock:^(NSArray *results, NSError *error) { 
    // results contains players with lots of wins or only a few wins. 
}];