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)")
}
}
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)")
}
}
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 {
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)")
}
}
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