FirebaseFirestore Framework Reference

FIRAggregateQuery


@interface FIRAggregateQuery : NSObject

A query that calculates aggregations over an underlying query.

query
The query whose aggregations will be calculated by this object.
Declaration
Objective-C

@property (nonatomic, readonly) FIRQuery *_Nonnull query;


                    
                    
                    -aggregationWithSource:completion:

Executes this query.

Declaration

Objective-C

- (void)aggregationWithSource:(FIRAggregateSource)source
                   completion:
                       (nonnull void (^)(FIRAggregateQuerySnapshot *_Nullable,
                                         NSError *_Nullable))completion;

Parameters

`source`	The source from which to acquire the aggregate results.
`completion`	a block to execute once the results have been successfully read. snapshot will be `nil` only if error is `non-nil`.