I'm trying to make drop-down list where picker view is not visible until user clicks on textfield. Then picker view disappears after user makes selection from pickerView. Currently, the picker View does not show up at all when I click on textfield.
import UIKit
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
#IBOutlet weak var textBox: UITextField!
#IBOutlet weak var pickerView: UIPickerView!
var choices = ["SortBy:", "Date(ascending)", "Date(descending)","Calories Burned(descending)","Duration(descending)"]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
self.view.endEditing(true)
return choices[row]
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return choices.count
}
fun pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
self.textBox.text = self.choices[row]
self.pickerView.isHidden = true
print("hello")
}
func textFieldDidBeginEditing(TextField: UITextField){
if TextField == self.textBox {
self.pickerView.isHidden = false
TextField.endEditing(true)
}
}
override func viewDidLoad() {
self.pickerView.isHidden = true
super.viewDidLoad()
}
}
try this :
override func viewDidLoad() {
self.pickerView.isHidden = true
super.viewDidLoad()
self.textBox.delegate = self
self.pickerView.delegate = self
}
Related
I have a UIPickerView that when tapping the done button, keeps selecting the last option of the Array. I can tap on either the UITextField or a button I'm using that assigns the UITextField as the first responder. My code is as follows:
Edit. I should also mention that I'm using Xcode 11 GM Seed if that was to make a difference. I tested a clean version of the code shown below on a separate project with nothing else and it is displaying the same behavior.
#IBOutlet weak var sortTypeTextField: UITextField!
var selectedSortOption = String()
let sortOptions = [
USER_REVIEWS_SORT_OPTION_DATE,
USER_REVIEWS_SORT_OPTION_LIKES,
USER_REVIEWS_SORT_OPTION_DISLIKES
]
sortOptions above is an array of Strings located in a different file but for the purpose of this question I’ll add here:
let USER_REVIEWS_SORT_OPTION_DATE = "Date"
let USER_REVIEWS_SORT_OPTION_LIKES = "Number of Likes"
let USER_REVIEWS_SORT_OPTION_DISLIKES = "Number of Dislikes"
let DONE_TOOLBAR_BUTTON_TITLE = "Done"
I have a function setupUI which I call in viewDidLoad along with the value for the sortTypeTextField. The value is the first String in the array when the viewController first loads.
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
}
func setupUI() {
sortTypeTextField.text = sortOptions[0]
createSortPicker()
createPickerToolbar()
}
func createSortPicker() {
let sortPicker = UIPickerView()
sortPicker.delegate = self
sortTypeTextField.inputView = sortPicker
}
func createPickerToolbar() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
let doneButton = UIBarButtonItem(title: DONE_TOOLBAR_BUTTON_TITLE, style: .plain, target: self, action: #selector(dismissKeyboard))
toolBar.setItems([doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
sortTypeTextField.inputAccessoryView = toolBar
}
#objc override func dismissKeyboard() {
view.endEditing(true)
}
I’m also using a button to display the UIPicker as shown here:
#IBAction func sortRatingsButtonWasTapped(_ sender: Any) {
sortTypeTextField?.becomeFirstResponder()
}
As shown below, I want for the sortTypeTextField value to change to the selected option but for some reason when tapping the Done button in the toolbar, the text shown is always the third String in the array regardless if I have chosen the first, the second or the third.
extension ReviewsViewController: UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
sortOptions.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return sortOptions[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
selectedSortOption = sortOptions[row]
sortTypeTextField.text = selectedSortOption
}
}
It seems to be a bug in the simulator. I tested the my code above and the code provided by Abdul Karim Khan on my device and the work as they should. The label updates according to the option selected in the picker view.
This is how I created pickerView,
class ViewController: UIViewController {
#IBOutlet weak var selectaday: UITextField!
let days = ["monday","wednesday"]
var selectedDay: String?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
createDayPicker()
}
func createDayPicker(){
let dayPicker = UIPickerView()
dayPicker.delegate = self
selectaday.inputView = dayPicker
}
}
extension ViewController: UIPickerViewDelegate, UIPickerViewDataSource{
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return days.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return days[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
selectedDay = days[row]
selectaday.text = selectedDay
}
}
I am trying to set up 2 UIPickerViews in 1 view controller. I have not been able to find resources that solve my problem.
I have tried following the answer from Diavel Rider on How to use 2 UIPickerView's in one View Controller?. I got some errors from that. I have also tried adding tags but was not able to successfully do that. I am using Swift 4.
Here is the code of my view controller:
import UIKit
class FirstViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ foodTypeUIPickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
var countrows : Int = nutritionPickerData.count
if pickerView == foodTypeUIPickerView { **[Error Here: "Binary operator '==' cannot be applied to operands of type '_' and 'UIPickerView'"]**
countrows = self.foodTypePickerData.count
}
return countrows
}
func pickerView(_ foodTypeUIPickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if pickerView == nutritionUIPickerView { **[Error Here: "Binary operator '==' cannot be applied to operands of type '_' and 'UIPickerView'"]**
let titleRow = nutritionPickerData[row]
return titleRow
} else if pickerView == foodTypeUIPickerView { **[Error Here: "Binary operator '==' cannot be applied to operands of type '_' and 'UIPickerView'"]**
let titleRow = foodTypePickerData[row]
return titleRow
}
return ""
}
#IBOutlet weak var nutritionUIPickerView: UIPickerView!
#IBOutlet weak var foodTypeUIPickerView: UIPickerView!
var nutritionPickerData = ["Protein", "Fiber", "Iron", "Fat", "Sodium", "Calcium/Vitamin D", "Energy", "Carbohydrates", "Cholestorol"]
var foodTypePickerData = ["Fruits", "Vegetables", "Legumes and Beans", "Grain", "Meat", "Dairy"]
#IBAction func submitUIButton(_ sender: Any) {
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.nutritionUIPickerView.delegate = self
self.nutritionUIPickerView.dataSource = self
self.foodTypeUIPickerView.delegate = self
self.foodTypeUIPickerView.dataSource = self
}
}
I need to use 2 picker views in 1 view controller. How do I do this?
You are referencing a non-existent variable named pickerView. You should update the parameter name to pickerView to avoid issues.
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if pickerView == foodTypeUIPickerView {
return self.foodTypePickerData.count
} else {
return self. nutritionPickerData.count
}
}
Make a similar change to the other delegate/data source methods.
You should separate your data sources and delegates and not put them inside your view controller. Set those as the delegate and datasource. Code written in swift 4.2 xcode 10.1
class ViewController: UIViewController {
#IBOutlet weak var foodPicker: UIPickerView!
#IBOutlet weak var nutritionPicker: UIPickerView!
var foodData = FoodData()
var nutritionData = NutritionData()
override func viewDidLoad() {
super.viewDidLoad()
foodPicker.delegate = foodData
foodPicker.dataSource = foodData
nutritionPicker.delegate = nutritionData
nutritionPicker.dataSource = nutritionData
}
#IBAction func actionButton(_ sender: UIButton) {
let food = foodPicker.delegate?.pickerView!(foodPicker, titleForRow: foodPicker.selectedRow(inComponent: 0), forComponent: 0)
let nutrition = nutritionPicker.delegate?.pickerView!(nutritionPicker, titleForRow: nutritionPicker.selectedRow(inComponent: 0), forComponent: 0)
print("You picked: \(food) and \(nutrition)")
}
}
class FoodData: NSObject, UIPickerViewDelegate, UIPickerViewDataSource {
var foodTypePickerData = ["Fruits", "Vegetables", "Legumes and Beans", "Grain", "Meat", "Dairy"]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return foodTypePickerData.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return foodTypePickerData[row]
}
}
class NutritionData: NSObject, UIPickerViewDataSource, UIPickerViewDelegate {
var nutritionPickerData = ["Protein", "Fiber", "Iron", "Fat", "Sodium", "Calcium/Vitamin D", "Energy", "Carbohydrates", "Cholestorol"]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return nutritionPickerData.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return nutritionPickerData[row]
}
}
I have a picker view and tableviews for each picker row programmed and I'd like to connect them via a UIButton. Any suggestions for a swift function to connect the Pickerview row with the botton to open that picker's table? (code below)
Thanks!
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var Picker1: UIPickerView!
var Array = ["G: Classroom friendly", "PG-13: Swear words OK(no sexual innuendo)", "R: Anything goes!"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
Picker1.delegate = self
Picker1.dataSource = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return Array[row]
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return Array.count
}
public func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
#IBAction func Submit(_ sender: Any) {
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
}
#IBAction func ContinueBotton(_ sender: UIButton) {
}
}
class ViewController1: UITableViewController {
#IBOutlet var ViewController1: UITableView!
var GRating = [GN]()
I've found some similar questions to this but none of the solutions matched my situation, and most were in objective-c which I don't know.
I'm trying to create a timer with minutes and seconds but I can't figure out how to wire up my second component.
How do I set up a second component with a UIPickerView?
This is what I have so far:
TimeViewController.swift
class TimeViewController: UIViewController, UIPickerViewDelegate {
#IBOutlet weak var timeSegueLabel: UILabel!
let minutes = Array(0...9)
let seconds = Array(0...59)
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return minutes.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return String(minutes[row])
}
override func viewDidLoad() {
super.viewDidLoad()
}
}
Thanks to #Bluehound for pointing me in the right direction. I had to look at some objective-c on GitHub to find out exactly how to do it, this is the answer I was looking for:
TimeViewController:
class TimeViewController: UIViewController, UIPickerViewDelegate {
#IBOutlet weak var timeSegueLabel: UILabel!
let minutes = Array(0...9)
let seconds = Array(0...59)
var recievedString: String = ""
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
//row = [repeatPickerView selectedRowInComponent:0];
var row = pickerView.selectedRowInComponent(0)
println("this is the pickerView\(row)")
if component == 0 {
return minutes.count
}
else {
return seconds.count
}
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
if component == 0 {
return String(minutes[row])
} else {
return String(seconds[row])
}
}
override func viewDidLoad() {
super.viewDidLoad()
timeSegueLabel.text = recievedString
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
This is the result:
Can do Picker with 2 components displaying in two labels
swift 4 xcode 9
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var lbl1: UILabel!
#IBOutlet weak var lbl2: UILabel!
#IBOutlet weak var picker1: UIPickerView!
var country = ["UK","US","JAPAN","UAE","CHINA","CANADA","EUROPE","IRAN","INDIA","ITALY" ]
var capital = [ "LONDON","WASHIGTON DC","TOKYO","ABU DHABI","BEIJING","OTTAWA","BRUSSELS","TEHRAN","NEW DELHI","ROME" ]
var val = 0
override func viewDidLoad() {
super.viewDidLoad()
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if component == 0 {
return country.count
} else {
return capital.count
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if component == 0 {
return String(country[row])
} else {
return String(capital[row])
}
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if component == 0 {
lbl1.text = country[row]
} else {
lbl2.text = capital[row]
}
}
}
I have a label, a picker (years), and a button. I want to be able to select the year on the picker, hit the button, and then display data associated with the year (a dictionary). Here's my code so far
class ViewController: UIViewController {
#IBOutlet weak var label: UILabel!
#IBOutlet weak var picker: UIPickerView!
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent
component: Int) -> Int {
return years.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int,
forComponent component: Int) -> String! {
return years[row]
}
/* func pickerView(pickerView: UIPickerView!, didSelectRow row: Int,
inComponent component: Int) {
label.text = "\(years[row])"
}
*/
#IBAction func button(sender: UIButton) {
label.text =
}
here is my Model:
let years = ["2015", "2014", "2013", "2012"]
let winners = [
2015: "Patriots",
2014: "Seahawks",
2013: "Ravens",
2012: "Giants"
]
You need to do a few things to make this work. First, make your viewController conform to the UIPickerViewDataSource and UIPickerViewDelegate and set your picker's data source and delegate in viewDidLoad. Then you'll want to use the delegate method pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) to respond to changes to the pickerView. Store the selection in an instance variable and you should be good to go:
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var label: UILabel!
#IBOutlet weak var picker: UIPickerView!
let years = [2015, 2014, 2013, 2012]
let winners = [
2015: "Patriots",
2014: "Seahawks",
2013: "Ravens",
2012: "Giants"
]
var selectedYear: Int?
override func viewDidLoad() {
super.viewDidLoad()
picker.delegate = self
picker.dataSource = self
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return years.count
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
selectedYear = years[row]
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return "\(years[row])"
}
#IBAction func button(sender: UIButton) {
if let year = selectedYear {
if let winner = winners[year] {
label.text = winner
}
}
}
}