ViewModel creation boilerplate in table/collectionviews about reactiveviewmodel HOT 4 OPEN

You may want to add map: in a category on NSArray. It helps me a lot.

from reactiveviewmodel.

This belongs in the parent view model, IMO. For example, if you have a ListViewModel, it should be responsible for creating ListItemViewModels out of ListItems.

You can also use -[RACSequence map:] and friends to make the implementation less verbose.

from reactiveviewmodel.

I've created a helper class that makes it easy to bind a collection of view model objects to a table view, as follows:

// create a cell template
UINib *nib = [UINib nibWithNibName:@"CETweetTableViewCell" bundle:nil];

// bind the ViewModels 'searchResults' property to a table view
[CETableViewBindingHelper bindingHelperForTableView:self.searchResultsTable
                        sourceSignal:RACObserve(self.viewModel, searchResults)
                        templateCell:nib];

The above binds the viewModel.searchResults property, which is of type NSArray, to the searchResultsTable, rendering each item in the array as a CETweetTableViewCell. Each item in the array is itself a view model which is bound to the respective cell view.

You can read more about it here:

http://www.scottlogic.com/blog/2014/05/11/reactivecocoa-tableview-binding.html

I am currently in the process of updating it to support mutable arrays.

from reactiveviewmodel.

I have made a similar helper class called HFTableCollectionBindingHelper. It supports mutable arrays and multiple sections. You can find it here:

https://github.com/haifengkao/HFTableCollectionBindingHelper.

from reactiveviewmodel.