iOS Edge Learning--two ways to implement cascading menus

First, Method 1:, the figure of the two tableview to two controllers to manage

• Key difficulties: Categorytableview was clicked, Subcategorytableview to get the corresponding data to refresh, so subcategorytableview to become Categorytableview agent.

• In Categorytableview, the cell is clicked to determine whether the agent is implemented, and the data collection is passed to Subcategorytableview

• Subcategorytableview implements the proxy method, receives the data, refreshes the table

Ii. Method 2: Use a controller as a data source and proxy for two TableView

• Key difficulty: The data source method needs to be judged which tableview

iOS Edge Learning--two ways to implement cascading menus