TableViews

Introduction to UITableViews and UITableViewDataSource. In the process we overviewed UITableViewCell, IndexPath and what it means to dequeue a cell.

Key classess and methods

• UITableView
• UITableViewDataSource - 2 required protocol methods: numberOfRows and cellForRow
• UITableViewCell
• IndexPath - key properties: row and section
• dequeueReusableCell()

Topics Covered - Introduction

• UITableView
• cells can be static or dynamic
• prototype cell
• reuse identifier e.g "countryCell"
• dataSource object (WE NEED TO SET THE DATASOURCE OBJECT e.g tableView.dataSource = self), configured in viewDidLoad()
• UITableViewDataSource - 2 required methods
• first required method is numberOfRows()
• second required methods is cellForRow()
• dequeueCell - recycles a cell if in memory, if not it creates a new cell
• [indexPath.row] - gets object for row at current indexPath
• UIBarButtonItem - button in navigation bar
• extension {...} - used to extend a class, in our case to conform to the UITableViewDataSource

Topics Covered - Table View Sections

• UITabBarController
• UITabItem
• viewControllers relationship segue connects a tab bar controller to a view controller
• Array(repeating: , count: )
• numberOfSections() - UITableViewDataSource method, returns number of sections in the table view
• titleForHeaderInSection() - UITableViewDataSource method, returns a String for each section header
• prepare(for segue: ) - here you set the data to be passed to the destination view controller
• segue.destination
• segue.source
• tableView.indexPathForSelectedRow
• [indexPath.section][indexPath.row] - gets thte section and the row at the current indexPath

TableView uses a dynamic prototype subtitle cell

TableView sections, UITabBarController

Lecture Video