Drop down list menu programmatically in Swift Xcode - ios

Question

I have made a drop down gender which is working fine however I have another drop down on same viewcontroller which shows drop down but when I select the item it gives error fatal error: unexpectedly found nil while unwrapping an Optional value I have tried out but confused. help me to solve the bloodList dropdown.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var genderButton: UIButton!
#IBAction func genderButton(_ sender: Any) {
self.PressDrop()
view.addSubview(genderTable)
}
#IBOutlet weak var genderTable: UITableView!
var flag = 1
var dropDownList = [String]()
#IBOutlet weak var bloodButton: UIButton!
var bloodList = [String]()
#IBAction func bloodButton(_ sender: Any) {
self.PressBlood()
view.addSubview(bloodTable)
}
#IBOutlet weak var bloodTable: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
dropDownList = ["Male", "Female", "Other"]
genderTable.delegate = self
genderTable.dataSource = self
genderTable.isHidden = true
view.addSubview(genderTable)
genderTable.layer.cornerRadius = 10
bloodList = ["A+", "A-", "AB+", "AB-"]
bloodTable.delegate = self
bloodTable.dataSource = self
bloodTable.isHidden = true
view.addSubview(bloodTable)
bloodTable.layer.cornerRadius = 10
}
func PressDrop() {
if flag == 0 {
UIView.setAnimationDuration(0.5)
self.genderTable.isHidden = true
self.flag = 1
}
else{
UIView.setAnimationDuration(0.5)
self.genderTable.isHidden = false
self.flag = 0
}
}
func PressBlood() {
if flag == 0 {
UIView.setAnimationDuration(0.5)
self.bloodTable.isHidden = true
self.flag = 1
}
else{
UIView.setAnimationDuration(0.5)
self.bloodTable.isHidden = false
self.flag = 0
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dropDownList.count
}
func tableViewBlood(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return bloodList.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 50
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = genderTable.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel!.text = dropDownList[indexPath.row]
return cell
}
func tableViewTwo(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = bloodTable.dequeueReusableCell(withIdentifier: "bloodCell", for: indexPath)
cell.textLabel!.text = bloodList[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedData = dropDownList[indexPath.row]
genderButton.setTitle(selectedData, for: .normal)
self.genderTable.isHidden = true
self.flag =
let indexPath = genderTable.indexPathForSelectedRow
let currentCell = genderTable.cellForRow(at: indexPath!)! as UITableViewCell
let finalresult = currentCell.textLabel!.text!
print("\(finalresult)")
}
private func tableViewTwo(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedBlood = bloodList[indexPath.row]
bloodButton.setTitle(selectedBlood, for: .normal)
self.bloodTable.isHidden = true
self.flag = 1
let indexPathTwo = bloodTable.indexPathForSelectedRow
let currentCellBlood = bloodTable.cellForRow(at: indexPathTwo!)! as UITableViewCell
let finalresultBlood = currentCellBlood.textLabel!.text!
print("\(finalresultBlood)")
}
}

Answer 1

You cannot change default delegate methods of your tableView, give conditions in the delegate methods like below :
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == genderTable {
return dropDownList.count
}
return bloodList.count
}
Also make similar changes in the remaining delegate methods.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if tableView == genderTable {
let cell = genderTable.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel!.text = dropDownList[indexPath.row]
return cell
} else {
let cell = bloodTable.dequeueReusableCell(withIdentifier: "bloodCell", for: indexPath)
cell.textLabel!.text = bloodList[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if tableView == genderTable {
let selectedData = dropDownList[indexPath.row]
genderButton.setTitle(selectedData, for: .normal)
self.genderTable.isHidden = true
let currentCell = genderTable.cellForRow(at: indexPath)! as UITableViewCell
let finalresult = currentCell.textLabel!.text!
print("\(finalresult)")
} else {
let selectedBlood = bloodList[indexPath.row]
bloodButton.setTitle(selectedBlood, for: .normal)
self.bloodTable.isHidden = true
let currentCellBlood = bloodTable.cellForRow(at: indexPath)! as UITableViewCell
let finalresultBlood = currentCellBlood.textLabel!.text!
print("\(finalresultBlood)")
}
}

Answer 2

Don't create like this
func tableViewTwo(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell (This will consider as new method to your current class)
They are all in build delegate methods of UITableview, you should override it, you cannot change it.
Instead of creating method, you try with Bool variable in respective button action.
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
If isDrop == true{
return dropDownList.count
}else{
return bloodList.count
}
}
Like change the condition
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

Answer 3

I waited for an answer but did not find :( that's ok . I thought a number of times and then come to this code yahoooo!!! then i believed i am really a programmer. Actually i did not defined the condition for each table view so i was in nightmare. This code is pure programatically and does not require any irritating third party library or awkward pods
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == tableViewB {
return dropDownList.count
}
else {
return genderL.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if tableView == tableViewB {
let cell = tableViewB.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel!.text = dropDownList[indexPath.row]
return cell
}
else {
let cell = genderT.dequeueReusableCell(withIdentifier: "gender", for: indexPath)
cell.textLabel!.text = genderL[indexPath.row]
return cell
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if tableView == tableViewB {
let selectedData = dropDownList[indexPath.row]
buttonB.setTitle(selectedData, for: .normal)
self.tableViewB.isHidden = true
self.flag = 1
let indexPath = tableViewB.indexPathForSelectedRow
let currentCell = tableViewB.cellForRow(at: indexPath!)! as UITableViewCell
let finalresult = currentCell.textLabel!.text!
print("\(finalresult)")
}
else {
let selectedDataG = genderL[indexPath.row]
genderB.setTitle(selectedDataG, for: .normal)
self.genderT.isHidden = true
self.flag = 1
let indexPath = genderT.indexPathForSelectedRow
let currentCell = genderT.cellForRow(at: indexPath!)! as UITableViewCell
let finalresult = currentCell.textLabel!.text!
print("\(finalresult)")
}
}