UITableViewController和一个单独的数据源对象

Question

I have a separate object for the data source of a UITableViewController. I want to modify the data source dynamically but I don't want to have a direct reference of the tableView object inside the data source. How can I notify the controller about the changes in the data source?

Currently I use the notification center but I don't believe this is the right choice.

Answer 1

可以发送NSNotification通知UITableView模型已更改，可以再次读取数据并重新加载表。

Answer 2

It would be appropriate to give the data source a reference to the table view to be refreshed or to add a property which is a block that the data source calls when some data has been updated (this block is supplied by the view controller and just reloads the table view).

The block approach is a little more generic and allows your data source to more easily be used with table / collection views.

In both cases, the relationship you're looking at is direct and 1 to 1. This is not a suitable place to use notifications. Notifications are for non-direct, broadcast type 1 to many communication requirements.

Answer 3

I got struct at the thing, One alternative I fount was KVO but I did not get much success implementing KVO, So I am also thinking to use Block. And you preferred which approach ?