Switch between tableViews using segmented Control - ios

Question

I have a tableView showing multiple tasks and i would like to programmatically switch between 2 dataSources. I have created a segmented control that appear at the top but when i click on the buttons there is no change and i don't know how to link my segmented Control to my dataSources, here's my code:
class MyTasksCollectionCell: UICollectionViewCell, UITableViewDelegate, UITableViewDataSource {
var tasks = [Add]()
var pastTasks = [Add]()
static let identifier = "MyTasksCollectionCell"
private let cellID = "CellID"
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.tasks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath) as! MyTasksTableCell
cell.accessoryType = .disclosureIndicator
cell.categoryLabel.text =
"\(tasks[indexPath.row].category)"
cell.dateLabel.text =
"\(tasks[indexPath.row].date)"
cell.hourLabel.text =
"\(tasks[indexPath.row].hour)"
if cell.categoryLabel.text == "Urgent" {
cell.categoryIcon.image = #imageLiteral(resourceName: "red.png")
}
if cell.categoryLabel.text == "Important" {
cell.categoryIcon.image = #imageLiteral(resourceName: "orange.png")
}
if cell.categoryLabel.text == "Not Important" {
cell.categoryIcon.image = #imageLiteral(resourceName: "green.png")
}
cell.dateIcon.image = UIImage(systemName: "calendar.badge.clock")
return cell
}
func addControl() {
let segmentItems = ["Present Tasks", "Past Tasks"]
let control = UISegmentedControl(items: segmentItems)
control.frame = CGRect(x: 10, y: 0, width: (self.tableView.frame.width - 20), height: 30)
control.addTarget(self, action: #selector(segmentControl(_:)), for: .valueChanged)
control.selectedSegmentIndex = 0
tableView.addSubview(control)
}
#objc func segmentControl(_ segmentedControl: UISegmentedControl) {
switch (segmentedControl.selectedSegmentIndex) {
case 0:
// First segment tapped
print("Present Tasks")
self.tableView.reloadData()
break
case 1:
// Second segment tapped
print("Past Tasks")
self.tableView.reloadData()
break
default:
break
}
}
}

Answer 1

Use an enum to know what to display in your tab depending on segment control value :
enum DispkayedTasks {
case current
case past
}
var displayedTask = DisplayedTasks.current
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
switch (displayedTask) {
case .current:
// First segment tapped
return self.tasks.count
case .past:
// Second segment tapped
return self.pastTasks.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath) as! MyTasksTableCell
cell.accessoryType = .disclosureIndicator
let task = {() -> Add in
switch (displayedTask) {
case .current:
// First segment tapped
return self.tasks[indexPath.row]
case past:
// Second segment tapped
return self.pastTasks[indexPath.row]
}
}()
cell.categoryLabel.text =
"\(task.category)"
cell.dateLabel.text =
"\(task.date)"
cell.hourLabel.text =
"\(task.hour)"
if cell.categoryLabel.text == "Urgent" {
cell.categoryIcon.image = #imageLiteral(resourceName: "red.png")
}
if cell.categoryLabel.text == "Important" {
cell.categoryIcon.image = #imageLiteral(resourceName: "orange.png")
}
if cell.categoryLabel.text == "Not Important" {
cell.categoryIcon.image = #imageLiteral(resourceName: "green.png")
}
cell.dateIcon.image = UIImage(systemName: "calendar.badge.clock")
return cell
}
#objc func segmentControl(_ segmentedControl: UISegmentedControl) {
switch (segmentedControl.selectedSegmentIndex) {
case 0:
// First segment tapped
print("Present Tasks")
displayedTasks = .current
self.tableView.reloadData()
case 1:
// Second segment tapped
print("Past Tasks")
displayedTasks = .past
self.tableView.reloadData()
default:
break
}
}