why titleForheaderInsection method in different table view controller not work? - ios

Question

why titleForheaderInsection method in different table view controller not work?
I create two table view controllers in one storyboard for my app, with different function, one is SettingsTableViewControlelr, one is CitylistTableViewControlelr, and they should have different section titles.
tableView:titleForHeaderInSection method is used to name section title, but unfortunately only the method in SettingsTableViewControlelr has been appeared correctly in iOS simulator, but the method in CitylistTableViewControlelr is not work, i put a breakpoint on tableView:titleForHeaderInSection method, and find the method even not be called in CitylistTableViewControlelr. Here is my code below:
SettingsTableViewController
import UIKit
class SettingsTableViewController: UITableViewController, UITableViewDataSource, UITableViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, titleForHeaderInSection section:Int) -> String? {
switch section{
case 0:
return"Settings"
default:
return nil
}
}
//the "tableView:titleForHeaderInSection" method in class SettingsTableViewController
//is called and section title appears on simulator.
override func tableView(tableView: UITableView,heightForHeaderInSection section:Int) -> CGFloat {
return 44
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("settingsIdentifier", forIndexPath: indexPath) as! UITableViewCell
return cell
}
}
CitylistTableViewControlelr
import UIKit
class CityListTableViewController: UITableViewController, UITableViewDataSource, UITableViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 2
}
func tableView(tableView: UITableView, titleForheaderInsection section: Int) -> String? {
switch section {
case 0:
return "Top Cities"
case 1:
return "Other Cities"
default:
return nil
}
}
//Putting a breakpoint here, and find "tableView:titleForHeaderInSection" method in
//CityListTableViewController is not even been called, thus the section titles, "Top Cities" & "Other Cities",
//do not appear in simulator.I have tried to add "override" keyword before the method, but the
//complier report error says "Method does not override any method from its superclass".
override func tableView(tableView: UITableView,heightForHeaderInSection section:Int) -> CGFloat {
return 44
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
switch section{
case 0:
return 12
case 1:
return 15
default:
return 0
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cityListIdentifier", forIndexPath: indexPath) as! UITableViewCell
switch indexPath.section{
case 0:
cell.textLabel!.text=topCitiesList[indexPath.row]
case 1:
cell.textLabel!.text=otherCitiesList[indexPath.row]
default:
cell.textLabel!.text="unknown"
}
return cell
}
}
My questions are:
Why tableView:titleForHeaderInSection method not be called in CityListTableViewController?
How can I correct my code to make the section title appear on simulator/iPhone respectively?

Answer 1

Have a look at the differences between the two:
In the first view controller where it is being called, the function is being declared like this:
override func tableView(tableView: UITableView, titleForHeaderInSection section:Int) -> String? {
switch section{
Whereas in the one it isn't called it is being declared like this:
func tableView(tableView: UITableView, titleForheaderInsection section: Int) -> String? {
switch section {
You are missing the override declaration. Also, you didn't capitalize the "header" in the second declaration (Thanks for pointing that out Jesper).