FilteredView Reference


                    
                    
                    YapDatabaseFilteredView

Undocumented

Declaration

Objective-C

@interface YapDatabaseFilteredView : YapDatabaseView

Swift

class YapDatabaseFilteredView : YapDatabaseView


                    
                    
                    YapDatabaseFilteredViewConnection

Undocumented

Declaration

Objective-C

@interface YapDatabaseFilteredViewConnection : YapDatabaseViewConnection

// Returns properly typed parent view instance
@property (nonatomic, strong, readonly) YapDatabaseFilteredView *filteredView;

@end

Swift

class YapDatabaseFilteredViewConnection : YapDatabaseViewConnection


                    
                    
                    YapDatabaseFilteredViewTransaction

Undocumented

Declaration

Objective-C

@interface YapDatabaseFilteredViewTransaction : YapDatabaseViewTransaction

// This class extends YapDatabaseViewTransaction.
//
// Please see YapDatabaseViewTransaction.h

@end

Swift

class YapDatabaseFilteredViewTransaction : YapDatabaseViewTransaction

YapDatabaseViewFiltering
The filtering block removes items from this view that are in the parent view.

A YapDatabaseFilteredView will have the same groups and same sort order as the parent, with the exception of those groups/rows that the filter block returned NO for.

Here’s how it works: When you initialize a YapDatabaseFilteredView instance, it will enumerate the parentView and invoke the filter block for every row in every group. So it can quickly copy a parentView as it doesn’t have to perform any sorting.

After its initialization, the filterView will automatically run for inserted / updated rows after the parentView has processed them. It then gets the group from parentView, and invokes the filterBlock again (if needed).

You should choose a block type that takes the minimum number of required parameters. The filterView can make various optimizations based on required parameters of the block.
See more
Declaration
Objective-C

@interface YapDatabaseViewFiltering : NSObject
Swift

class YapDatabaseViewFiltering : NSObject