YapDatabaseFilteredViewTransaction

@interface YapDatabaseFilteredViewTransaction : YapDatabaseViewTransaction

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

@end

Undocumented

ReadWrite

  • This method allows you to change the filterBlock on-the-fly.

    When you do so, the extension will emit the smallest change-set possible. That is, it does NOT clear the view and start from scratch. Rather it performs a quick in-place update. The end result is a minimal change-set that looks nice for tableView / collectionView animations.

    For example, in Apple’s phone app, in the Recents tab, one can switch between all and missed calls. Tapping the missed button smoothly animates away all non-red rows. It looks great. You can get the same effect by using a YapDatabaseFilteredView, and swapping in/out a filterBlock to allow/disallow non-missed calls.

    Note: You must pass a different versionTag, or this method does nothing.

    Declaration

    Objective-C

    - (void)setFiltering:(nonnull YapDatabaseViewFiltering *)filtering
          versionTag:(nullable NSString *)tag;

    Swift

    func setFiltering(_ filtering: YapDatabaseViewFiltering, versionTag tag: String?)