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]()
Related
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 am building a simple app that has a PickerView with 3 selections that should link to 3 viewControllers each named FirstViewController, SecondViewController and ThirdViewController.
But I am getting this error
> NSInvalidArgumentException', reason: 'Receiver (<Scroller.ViewController: 0x7ff7b5e0b670>) has no segue with identifier 'SecondSegue'
I have three options in the picker and a button to go to that selection's viewController:
My code below works on first loading then crashes
import UIKit
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBAction func continueButtonPressed(_ sender: AnyObject) {
self.performSegue(withIdentifier: "\(chosenState)Segue", sender: nil)
print("no chance")
}
#IBOutlet weak var pickerView: UIPickerView!
var pickerData = ["First","Second","Third"]
var chosenState = ""
override func viewDidLoad() {
super.viewDidLoad()
print("Help")
pickerView.delegate = self
pickerView.dataSource = self
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// The number of columns of data
// The number of rows of data
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
// The data to return for the row and component (column) that's being passed in
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerData[row]
}
//Called when the user changes the selection...
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
chosenState = pickerData[row]
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
}
can anyone help me understand how to fix this ?
Have I named the Segues ok? They are all named the same - is that correct?
You have to set the segue identifier to second view controller as SecondSegue
It seems your SecondSegue to your second UIViewController has not been named properly.
Be careful, it is case sensitive, it must be named precisely SecondSegue. And after having changed the name, don't forget to validate your input with the return key.
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
}
Why doesn't the view controller conform the UIPickerViewDataSource?
I have checked everything I could do to debug it from the web.
I have typed all the necessary functions for the protocols (Swift 3.1) but in vain.
Here is my code:
class SelectClassViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
let grades = ["7", "8", "9", "10", "11", "12"]
var selectCurrentGrade : String? = nil
#IBOutlet weak var Grade: UIPickerView!
#IBAction func Next(_ sender: Any) {
if selectCurrentGrade != nil {
performSegue(withIdentifier: "GradeToClass", sender: self)
}
}
#IBAction func Back(_ sender: Any) {
performSegue(withIdentifier: "GradeToMain", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return grades[row]
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return grades.count
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
selectCurrentGrade = grades[row]
}
}
}
Your functions are inside viewDidLoad, move them outside and it'll work
I'm trying to make items show up on my pickerView, I can't seem to figure out why its not showing up. Any Suggestions?
import UIKit
class InspectionViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var picker: UIPickerView!
var pickerData: [String] = [String]();
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// Connect data:
self.picker.delegate = self;
self.picker.dataSource = self;
// Input data into the Array:
pickerData = ["53W4", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6"];
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return pickerData[row]
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
You should use this:
func pickerView(
_ pickerView: UIPickerView,
titleForRow row: Int,
forComponent component: Int
) -> String? {
pickerData[row]
}
instead of:
func pickerView(
pickerView: UIPickerView,
titleForRow row: Int,
forComponent component: Int
) -> String! {
pickerData[row]
}
The diff is in Omitting Argument Labels.
Here is a doc link