as you can see, my UIPickerView is in back a Tab bar, how to make it in front them? i'm using swift
and also my done button doesn't work to hide the UIView that contain UIPickerView, i'm sure the button connected to an action
here's my doneButton action
@IBAction func doneButtonTapped(sender: AnyObject) {
self.viewUIPickerView.viewWithTag(1)?.hidden = true
}
Two PickerViews selectTypeOfWorkChoices& selectLocationChoices do not appear correctly.
A function dismissPickerView() seems working well. However, another function "createPickerView()" has some problems. Although UIpickerviews appear, I cannot see the choices in UIPickerViews and I don't know why.
Could anyone help me figure out what's wrong with my code, please??
@IBOutlet weak var selectTypeOfWorkChoices: UIPickerView!
@IBOutlet weak var selectLocationChoices: UIPickerView!
override func viewDidLoad() {
super.viewDidLoad()
createPickerView()
dismissPickerView()
}
var typeOfWork = ["--", "a", "b", "c"]
var location = ["--", "A", "B", "C"]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
var countrows : Int = typeOfWork.count
if pickerView == selectLocationChoices {
countrows = self.location.count
}
return countrows
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if pickerView == selectTypeOfWorkChoices {
let titleRow = typeOfWork[row]
return titleRow
}
else if pickerView == selectLocationChoices {
let titleRow = location[row]
return titleRow
}
return ""
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerView == selectTypeOfWorkChoices {
selectedPriority = typeOfWork[row]
selectTypeOfWork.text = selectedPriority
self.selectTypeOfWork.text = self.typeOfWork[row]
}
else if pickerView == selectLocationChoices {
locationSelectedPriority = location[row]
selectLocation.text = locationSelectedPriority
self.selectLocation.text = self.location[row]
}
}
var selectedPriority : String?
var locationSelectedPriority : String?
func createPickerView() {
let pickerView = UIPickerView()
pickerView.delegate = self
self.selectTypeOfWorkChoices.delegate = self
self.selectTypeOfWorkChoices.dataSource = self
self.selectLocationChoices.delegate = self
self.selectLocationChoices.dataSource = self
selectTypeOfWork.inputView = selectTypeOfWorkChoices
selectLocation.inputView = selectLocationChoices
}
@objc func dismissPickerView() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
let doneButton = UIBarButtonItem(title:"Done", style: .plain, target: self, action: #selector(self.dismissKeyboard))
toolBar.setItems([doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
selectTypeOfWork.inputAccessoryView = toolBar
selectLocation.inputAccessoryView = toolBar
}
@objc func dismissKeyboard () {
view.endEditing(true)
}
@Hey everybody,
I have trouble w/ UIPickerView. I'm planning to create a view controller which should allow user to specify the one of the next day. PickerView should show strings like "wed, 1 Dec", "thu, 2 dec", etc The problem is PickerView is empty (PickerView doesn't show any string). In spite of delegates methods return necessary count of strings and the strings themselves.
Image of empty PickerView - LINK
Below is my code.
.h
@interface OMSDatePickerViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>
@property (nonatomic ) NSInteger amountOfDays;
@property (nonatomic ) CGFloat cellHeight;
@end
.m
#import "OMSDatePickerViewController.h"
@interface OMSDatePickerViewController () {
NSMutableArray * dateForChoose;
NSInteger datePickerActiveIdx;
UIPickerView *dPicker;
}
@end
- (void)viewDidLoad
{
NSLog(@"viewDidLoad");
[super viewDidLoad];
// Do any additional setup after loading the view.
dateForChoose = [[NSMutableArray alloc] init];
dPicker = [[UIPickerView alloc] initWithFrame:CGRectMake(5, 5, 200, 150)];
[self.view setFrame: CGRectMake(xPos, yPos, WIN_WIDTH, WIN_HEIGHT)];
[self.view setAlpha:1.0];
[self.view setBackgroundColor:[UIColor grayColor]];
[[self.view layer] setCornerRadius:5.0f];
[[self.view layer] setBorderWidth:2.0f];
[[self.view layer] setMasksToBounds:YES];
[self.view setContentMode:UIViewContentModeScaleToFill];
// Creating the list of dates
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.dateFormat = @"EEE',' dd MMM";
[dateForChoose removeAllObjects];
// Add some data for demo purposes.
NSDate *curDate = [NSDate date];
NSString *str;
for (NSInteger i = 0; i< amountOfDays; i++, curDate = [curDate dateByAddingTimeInterval:60*60*24]) {
str = [df stringFromDate:curDate];
[dateForChoose addObject:str];
}
[dPicker setDataSource: self];
[dPicker setDelegate: self];
dPicker.showsSelectionIndicator = YES;
[self.view addSubview:dPicker];
datePickerActiveIdx = 0;
NSLog(@"%@", dPicker);
}
and delegates methods
// Number of components.
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
// Total rows in our component.
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
NSLog(@"numberOfRowsInComponent: %d", [dateForChoose count]);
return [dateForChoose count];
}
// Display each row's data.
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
NSString *str = [dateForChoose objectAtIndex: row];
NSLog(@"%@", [dateForChoose objectAtIndex: row]);
return [dateForChoose objectAtIndex: row];
}
// Do something with the selected row.
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
NSLog(@"You selected this [%2d, %2d]: %@", row, component, [dateForChoose objectAtIndex: row]);
NSLog(@"count - %d", [dateForChoose count]);
datePickerActiveIdx = row;
}
Interesting things when I try to rotate wheel "didSelectRow" is called and always return row == 0 and show:
[55215:c07] You selected this [ 0, 0]: Wed, 04 Dec
[55215:c07] count - 4
Any ideas?
Addition: the same code work well if it's copied to the implementation of internal function of some UIViewController. For example it's button event handler and the code is called by pressing this button.
WHAT IS IT???*
PS: working log
[18241:907] viewDidLoad
[18241:907] <UIPickerView: 0x1cd944a0; frame = (5 5; 190 162); layer = <CALayer: 0x1cd94990>>
[18241:907] viewWillAppear
[18241:907] numberOfRowsInComponent: 4
[18241:907] numberOfRowsInComponent: 4
[18241:907] Wed, 04 Dec
[18241:907] Thu, 05 Dec
[18241:907] Fri, 06 Dec
[18241:907] Sat, 07 Dec
[18241:907] viewDidAppear
The Google Calendar app has a feature where you can customize when you want a notification to be sent before an event. If you're unfamiliar with it, it looks like this:
Google Calendar Custom Notification
It's essentially a picker view with two components, the first one showing numbers for the user to choose, and the second showing units of time ("minutes", "hours", "days", "weeks"). When the user selects the unit of time, the numbers change. For example, if the user chooses "minutes" as their unit, the first component will show numbers 1 through 60. If they choose "hours", the first component will show 1 through 24. Selecting "days" will show 1 through 28, and "weeks" will show 1 through 4.
I want to develop a similar feature, but when I run my code I get the error "Index out of range". The error occurs in the last function in this chunk of code. In the debug section, the value of "row" is 0. I think the error has to do with the differences in the sizes of the arrays, but I'm not sure. All help is appreciated!
import UIKit
class AlarmSet
{
func timeIntervals() -> [String]
{
return ["minutes", "hours", "days", "weeks"]
}
func timeValues(time: String) -> [Int]
{
switch time
{
case "minutes":
return Array(1...60)
case "hours":
return Array(1...24)
case "days":
return Array(1...28)
case "weeks":
return [1, 2, 3, 4]
default:
return [0]
}
}
}
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate
{
@IBOutlet weak var addAlarm: UIButton!
@IBOutlet weak var alarmView: UIPickerView!
//The first component of the picker displays numbers
var picker1Options:[Int] = []
//The second picker displays units of time (minutes, hours, etc.)
var picker2Options:[String] = []
override func viewDidLoad()
{
super.viewDidLoad()
alarmView.delegate = self
alarmView.dataSource = self
alarmView.delegate?.pickerView?(alarmView, didSelectRow: 0, inComponent: 0)
alarmView.delegate?.pickerView?(alarmView, didSelectRow: 0, inComponent: 1)
alarmView.isHidden = true
let alarm = AlarmSet();
picker2Options = alarm.timeIntervals()
let firstValue = picker2Options[0]
picker1Options = alarm.timeValues(time: firstValue)
// Do any additional setup after loading the view.
}
func numberOfComponents(in pickerView: UIPickerView) -> Int
{
return 2
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
{
if component == 1
{
return picker2Options.count
}
else
{
return picker1Options.count
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
{
if component == 0
{
return "\(picker1Options[row])"
}
else
{
return "\(picker2Options[row])"
}
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
{
if component == 1
{
let alarm = AlarmSet();
//Out of range error is on this next line
let currentValue = picker2Options[row]
picker1Options = alarm.timeValues(time: currentValue)
pickerView.reloadAllComponents()
}
}
}
I'm working on Preparing UIPickerView with months and year in iOS.
Below is my code.
in viewdidload :
//Array for picker view
monthsArray=[[NSMutableArray alloc]initWithObjects:@"Jan",@"Feb",@"Mar",@"Apr",@"May",@"Jun",@"Jul",@"Aug",@"Sep",@"Oct",@"Nov",@"Dec",nil];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy"];
NSString *yearString = [formatter stringFromDate:[NSDate date]];
yearsArray=[[NSMutableArray alloc]init];
for (int i=0; i<13; i++)
{
[yearsArray addObject:[NSString stringWithFormat:@"%d",[yearString intValue]+i]];
}
myPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 200, 320, 200)];
myPickerView.delegate = self;
myPickerView.showsSelectionIndicator = YES;
[myPickerView selectRow:0 inComponent:0 animated:YES];
[self.view addSubview:myPickerView];
Picker view delegate methods:
// tell the picker how many components it will have
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 2;
}
// tell the picker how many rows are available for a given component
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
NSInteger rowsInComponent;
if (component==0)
{
rowsInComponent=[monthsArray count];
}
else
{
rowsInComponent=[yearsArray count];
}
return rowsInComponent;
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString * nameInRow;
if (component==0)
{
nameInRow=[monthsArray objectAtIndex:row];
}
else if (component==1)
{
nameInRow=[yearsArray objectAtIndex:row];
}
return nameInRow;
}
// tell the picker the width of each row for a given component
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
CGFloat componentWidth ;
if (component==0)
{
componentWidth = 100;
}
else {
componentWidth = 100;
}
return componentWidth;
}
And i got the following output :
But in the current year , the months from Jan to Oct have expired. How to disable those years in my picker only for the current year dynamically. Those months should be available for the remaining years.
Actually the real output is,
In above, the expired months in the current year should be disabled in UI.
Any comments or suggestions would be appreciated.
Thank you in advance.
How do I change the font size in a picker view? I have read a lot of questions about this, but none are in Swift 3. I have three picker views; the first two have two columns and have the same data source and delegate. The last one has one column and has a different data source and delegate. I can't fit the text in the first two picker views by one character. How do I shrink the font size in a UIPickerView and adjust the picker view row height, if necessary? Thanks.
class ViewController: UIViewController {
//MARK: Properties
@IBOutlet weak var layoutLengthPicker: UIPickerView!
@IBOutlet weak var layoutWidthPicker: UIPickerView!
@IBOutlet weak var trackPicker: UIPickerView!
let layoutLengthPickerDelegate = DimensionsPickerDelegate()
let layoutWidthPickerDelegate = DimensionsPickerDelegate()
let trackPickerDelegate = TrackPickerDelegate()
override func viewDidLoad() {
super.viewDidLoad()
layoutLengthPicker.delegate = layoutLengthPickerDelegate
layoutLengthPicker.dataSource = layoutLengthPickerDelegate
layoutWidthPicker.delegate = layoutWidthPickerDelegate
layoutWidthPicker.dataSource = layoutWidthPickerDelegate
trackPicker.delegate = trackPickerDelegate
trackPicker.dataSource = trackPickerDelegate
// Do any additional setup after loading the view, typically from a nib.
}
//MARK: Actions
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
class DimensionsPickerDelegate: NSObject, UIPickerViewDataSource, UIPickerViewDelegate {
let feet = ["0 Ft.", "1 Ft.", "2 Ft.", "3 Ft.", "4 Ft.", "5 Ft.", "6 Ft.", "7 Ft.", "8 Ft.", "9 Ft.", "10 Ft.", "11 Ft.", "12 Ft.", "13 Ft.", "14 Ft.", "15 Ft.", "16 Ft.", "17 Ft.", "18 Ft.", "19 Ft.", "20 Ft.", "21 Ft.", "22 Ft.", "23 Ft.", "24 Ft.", "25 Ft.", "26 Ft.", "27 Ft.", "28 Ft.", "29 Ft.", "30 Ft.", "31 Ft.", "32 Ft.", "33 Ft.", "34 Ft.", "35 Ft.", "36 Ft.", "37 Ft.", "38 Ft.", "39 Ft.", "40 Ft.", "41 Ft.", "42 Ft.", "43 Ft.", "44 Ft.", "45 Ft.", "46 Ft.", "47 Ft.", "48 Ft.", "49 Ft.", "50 Ft.", "51 Ft.", "52 Ft.", "53 Ft.", "54 Ft.", "55 Ft.", "56 Ft.", "57 Ft.", "58 Ft.", "59 Ft.", "60 Ft.", "61 Ft.", "62 Ft.", "63 Ft.", "64 Ft.", "65 Ft.", "66 Ft.", "67 Ft.", "68 Ft.", "69 Ft.", "70 Ft.", "71 Ft.", "72 Ft.", "73 Ft.", "74 Ft.", "75 Ft.", "76 Ft.", "77 Ft.", "78 Ft.", "79 Ft.", "80 Ft.", "81 Ft.", "82 Ft.", "83 Ft.", "84 Ft.", "85 Ft.", "86 Ft.", "87 Ft.", "88 Ft.", "89 Ft.", "90 Ft.", "91 Ft.", "92 Ft.", "93 Ft.", "94 Ft.", "95 Ft.", "96 Ft.", "97 Ft.", "98 Ft.", "99 Ft.", "100 Ft."]
let inches = ["0 In.", "1 In.", "2 In.", "3 In.", "4 In.", "5 In.", "6 In.", "7 In.", "8 In.", "9 In.", "10 In.", "11 In.", "12 In."]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if component == 0 { return feet.count } else { return inches.count}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if component == 0 {return feet[row]} else {return inches[row]}
}
}
class TrackPickerDelegate: NSObject, UIPickerViewDataSource, UIPickerViewDelegate {
let manufacturers = ["Atlas True Track", "Atlas Code 100", "Atlas Code 83", "Bachmann Nickel Silver", "Bachmann Steel Alloy", "Kato", "Life-Like Trains Code 100", "LIfe-Like Trains Power-Loc", "Peco Code 100", "Peco Code 83", "Peco Code 75", "Shinohara Code 100", "Shinohara Code 70", "Walthers"]
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return manufacturers.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return manufacturers[row]
}
}
I have a UIPickerView with a UIToolBar item added to it (Done Button). But when I select the button, it's supposed to print something to the console via #selector(dismissKeyboard), and yet it doesn't.
I'm relatively new to Swift and I'm doing everything programmatically, so I'm just having a bit of a hard time figuring out why I cannot interact with the button that's added as a subview to my pickerView.
Here is the relevant code that I'm working with... Please let me know if you need more info...
As a side, I already assigned the delegate and datasource for the pickerView, and I call the createToolBar() function inside the viewDidLoad.
var timerImage = UIButton()
var timer = Timer()
var timerDisplayed = 0
let image1 = UIImage(named: "stopwatch")
let timePicker = UIPickerView()
@objc func dismissKeyboard(){
print("PickerView Dismissed")
view.endEditing(true)
}
func pickerViewConstraints(){
timePicker.anchor(top: nil, leading: view.safeAreaLayoutGuide.leadingAnchor, bottom: view.safeAreaLayoutGuide.bottomAnchor, trailing: view.safeAreaLayoutGuide.trailingAnchor)
}
func createToolBar(){
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(dismissKeyboard))
let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height))
toolBar.sizeToFit()
toolBar.setItems([doneButton], animated: true)
toolBar.isTranslucent = false
toolBar.isUserInteractionEnabled = true
timePicker.addSubview(toolBar)
self.view.bringSubviewToFront(toolBar)
}
@objc func timeClock(){
view.addSubview(timePicker)
pickerViewConstraints()
timePicker.backgroundColor = .white
DispatchQueue.main.async {
self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.Action), userInfo: nil, repeats: true)
self.timerImage.setImage(nil, for: .normal)
}
}
How can I dismiss a uipickerview view using swift? I have created the UIPickerView in UITableView as I want it to be populated with the elements in the UITableView. Then I have just a UIButton appear on the screen. I want it so that the UIPickerView will be removed when the button is pressed.
//being able to delete a row
// this method handles row deletion
override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
// Edit Button
let editAction = UITableViewRowAction(style: .default, title: "Edit", handler: { (action, indexPath) in
//saving the index of section
self.contactIndex = indexPath.section
// print(self.tableViewData[indexPath.section].exerciseData[indexPath.row])
print(self.tableViewData[indexPath.section])
//setting exercisesInSelectedWorkout to exercise names within workout
self.exercisesInSelectedWorkout = self.tableViewData[indexPath.section].exerciseData
//creating uipicker
var UIPicker: UIPickerView = UIPickerView()
UIPicker.delegate = self as UIPickerViewDelegate
UIPicker.dataSource = self as UIPickerViewDataSource
let hello = UIPicker
//Calling UIPicker done buttons:
self.view.addSubview(self.TheDoneButton)
self.TheDoneButton.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
self.TheDoneButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
self.TheDoneButton.centerYAnchor.constraint(equalTo: self.view.centerYAnchor ,constant: 40),
])
//adding uipicker to screen
self.view.addSubview(UIPicker)
UIPicker.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
UIPicker.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
UIPicker.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -150),
//UIPicker.widthAnchor.constraint(equalToConstant: self.view.frame.width - 64)
])
//locking tableview
tableView.alwaysBounceVertical = false
})
editAction.backgroundColor = UIColor.blue
// Delete Action UITableView
let deleteAction = UITableViewRowAction(style: .default, title: "Delete", handler: { (action, indexPath) in
//removing data from tableview
self.tableViewData.remove(at: indexPath.section)
tableView.deleteSections(IndexSet(integer: indexPath.section), with: .top)
//Deleting Data from CoreData
CoreDataManager.sharedInstance.deleteDataFromCoreData(contact: self.contacts[indexPath.section])
print("Items removed from Table View")
print("Row Deleted")
})
deleteAction.backgroundColor = UIColor.red
return [editAction, deleteAction]
}
//UIPICKER Done button function (what happens when done is pressed)
@objc func uipickerDoneButtonPressed(){
I'm aware of the pickerView:viewForRow:forComponent:reusingView method, but when using the view it passes in reusingView: how do I change it to use a different text color? If I use view.backgroundColor = [UIColor whiteColor]; none of the views show up anymore.
The is a method inside the
custom cell class
and all components are initiated in the beginning:
// MARK: - Initialize
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.addSubview(textFieldView)
self.textFieldView.delegate = self
self.superview?.addSubview(tablePicker)
self.textFieldView.inputView = tablePicker
self.tablePicker.register(UITableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)
self.tablePicker.delegate = self
self.tablePicker.dataSource = self
self.tablePicker.isHidden = false
}
I have also configured all constraints and call it from superview? , because it's a custom cell class.
Before I did change the input method for UITextField the keyboard appeared. However, now UIViewPicker shows up.
Question:Is it possible to make both inputs for the same UITextField simultaneously?
I have separate files for my UIView and its correspondant UIViewController. I have a UITextField in my UIVew and I want the text displayed in the field to be displayed immediately when I select a row from the UIPickerView. Now I have end editing and start editing again in order for my UITextField.text property to update to the content selected in the row.
I have set up my code like this:
UITextField in UIView:
let presentSelectedCaloriesTextField: UITextField = {
let textField = UITextField()
textField.layer.borderColor = UIColor.black.cgColor
textField.layer.borderWidth = 1
textField.addTarget(self, action: #selector(handleSelectCalories), for: .editingDidBegin)
return textField
}()
Handler:
@objc func handleSelectCalories() {
selectCaloriesDelegate?.handleSelectCalories(for: self)
}
Delegate:
UIView.selectCaloriesDelegate = self
In my UIViewController:
// MARK: - Handle selected calories delegate
func handleSelectCalories(for view: RaceView) {
// Create picker view for selection of calories
let challengeWeighedCaloriesPicker = UIPickerView()
// Set datasoruce and delegate of picker view to this vc send and receive content
challengeWeighedCaloriesPicker.dataSource = self
challengeWeighedCaloriesPicker.delegate = self
// Set the picker view as the input keyboard for select calories textfield
view.presentSelectedCaloriesTextField.inputView = challengeWeighedCaloriesPicker
// UPDATES ONLY AFTER I'VE SELECTED A ROW AND END AND START EDITING IN TEXTFIELD AGAIN
view.presentSelectedCaloriesTextField.text = selectedCalories
}
Someone knows how to this so that the UITextField.text property gets set immediately whenever I scroll through the rows of the UIPickerView?
I'm using pickerview in project it's working fine on date picker but when I'm using array list in that pickerview it's lagging on iPhone as well as simulator. Any help with this issue? Thanks in advance.
I want change frame size of UIImagePicker when I get photo from photoLibrary or camera. It only allow square size frame to crop it but I have to give photo in 5:3 ratio in. How can I do it in Swift?
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var pickerLabel: UIPickerView!
func selectPhoto(){
let picker = UIImagePickerController()
picker.delegate = self
picker.sourceType = .photoLibrary
picker.allowsEditing = true
present(picker,animated: true, completion: nil)
image = imageFromGallery
imageView.image = imageFromGallery
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
imageFromGallery = (info[.editedImage] as? UIImage)!
image = imageFromGallery
imageView.image = imageFromGallery
self.dismiss(animated: true, completion: nil)
}
I call selectPhoto() to get photos.
There are some questions like my question but I didn't find exact solution for Swift.
I have one UIPickerView. This is having nearly 200 items, each items has long texts, so, i want to resize the UIPickerView's font size. How can i change it? It is possible? Can any one help me? Thanks !
Yuva.M
I've already seen two similar questions to mine, but the answers for those questions do not work for me. I have an old project with a list of countries manually typed out inside a set of square brackets.
I can easily use this in my pickerView but I'm wondering if there is a more efficient way to do this?
I will be using the list of countries in a UIPickerView.
I would like to send the selected UIPickerViews row to another view controller. I have placed my UIPickerViewdidSelectRow inside of my prepare for segue function. However the selected strings are not going to my next View Controller. Could someone explain to me what I am doing wrong? I really appreciate it.
import UIKit
class LengthViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate {
@IBOutlet weak var lengthTextField: UITextField!
@IBOutlet weak var lengthPickerView: UIPickerView!
var startingUnit = ["","Feet","Inches","Nanometer","Millimeter","Meters","Kilometer","Yards","Miles"]
var finalUnit = ["","Feet","Inches","Nanometer","Millimeter","Meters","Kilometer","Yards","Miles"]
var feet = Double()
var inches = Double()
var nanometer = Double()
var millimeter = Double()
var meters = Double()
var kilometer = Double()
var yards = Double()
var miles = Double()
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:)))
view.addGestureRecognizer(tap)
lengthPickerView.delegate = self
lengthPickerView.dataSource = self
lengthTextField.delegate = self
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
guard let oldText = textField.text, let r = Range(range, in: oldText) else {
return true
}
let newText = oldText.replacingCharacters(in: r, with: string)
let isNumeric = newText.isEmpty || (Double(newText) != nil)
let numberOfDots = newText.components(separatedBy: ".").count - 1
let numberOfDecimalDigits: Int
if let dotIndex = newText.firstIndex(of: ".") {
numberOfDecimalDigits = newText.distance(from: dotIndex, to: newText.endIndex) - 1
} else {
numberOfDecimalDigits = 0
}
return isNumeric && numberOfDots <= 1 && numberOfDecimalDigits <= 5
}
func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
var label = UILabel()
if let v = view as? UILabel { label = v }
label.font = UIFont (name: "System", size: 20)
label.textColor = UIColor.white
label.text = startingUnit[row]
label.text = finalUnit[row]
label.textAlignment = .center
return label
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if component == 0 {
return startingUnit.count
}else{
return finalUnit.count
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if component == 0 {
return startingUnit[row]
}else{
return finalUnit[row]
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let lengthOutput = segue.destination as! LengthOutputViewController
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if component == 0 {
lengthOutput.startingLength = startingUnit[row] //This is where i try to send to next view controller
}
if component == 1 {
lengthOutput.endingLength = finalUnit[row] //This is where i try to send to next view controller
}
}
}
@IBAction func calculatePressed(_ sender: Any) {
if lengthTextField == nil {
createAlert(title: "Missing length value", message: "Enter value")
}else{
performSegue(withIdentifier: "lengthOuput", sender: nil)
}
}
func createAlert (title: String, message: String){
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: { (Action) in
alert.dismiss(animated: true, completion: nil)
}))
self.present(alert, animated: true, completion: nil)
}
}
I have setup a viewcontroller where there are 7 "questions" and 7 "answers". I've created a UIPickerView that allows users to select their answer when they click on the answer's UITextField, and save it in realm.
However, when a user has already selected an answer (example: "Agree"), "Agree" doesn't show up as the selected row in the UIPickerView when I click the UITextField for that answer.
How do I set the default or "selectedrow" for the UIPickerview to the answer that is displayed in the UITextField and is saved in Realm?
import UIKit
import RealmSwift
class QuestionViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
setupDelegateForPickerView()
setupDelegatesForTextFields()
}
override func viewWillAppear(_ animated: Bool) {
loadAnswers()
}
@IBOutlet weak var Question1TextField: UITextField!
@IBOutlet weak var Question2TextField: UITextField!
@IBOutlet weak var Question3TextField: UITextField!
@IBOutlet weak var Question4TextField: UITextField!
@IBOutlet weak var Question5TextField: UITextField!
@IBOutlet weak var Question6TextField: UITextField!
@IBOutlet weak var Question7TextField: UITextField!
// Setting up a UIPickerview from the ToolbarPickerView class
let realm = try! Realm()
var answers: Results<Answer>?
var answerArray = [UITextField]()
func loadAnswers() {
var answersGiven = realm.objects(Answer.self).filter("id = 1")
for answer in answersGiven {
Question1TextField.text = answer.Answer1
Question2TextField.text = answer.Answer2
Question3TextField.text = answer.Answer3
Question4TextField.text = answer.Answer4
Question5TextField.text = answer.Answer5
Question6TextField.text = answer.Answer6
Question7TextField.text = answer.Answer7
}
}
let pickerView = ToolbarPickerView()
let Menu = ["Strongly Disagree",
"Disagree",
"Neutral",
"Agree",
"Strongly Agree"]
var selectedMenu : String?
func setupDelegatesForTextFields() {
//appending textfields in an array
answerArray += [Question1TextField, Question2TextField, Question3TextField, Question4TextField, Question5TextField, Question6TextField, Question7TextField]
//using the array to set up the delegates, inputview for pickerview and also the inputAccessoryView for the toolbar
for answer in answerArray {
answer.delegate = self
answer.inputView = pickerView
answer.inputAccessoryView = pickerView.toolbar
}
}
func setupDelegateForPickerView() {
pickerView.dataSource = self
pickerView.delegate = self
pickerView.toolbarDelegate = self
}
func setDefaultValue(item: String, inComponent: Int){
if let indexPosition = Menu.firstIndex(of: item){
pickerView.selectRow(indexPosition, inComponent: inComponent, animated: true)
}
}
// Dismissing Keyboard on tapped
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
}
extension QuestionViewController : UITextFieldDelegate {
func textFieldDidBeginEditing(_ textField: UITextField) {
self.pickerView.reloadAllComponents()
}
}
extension QuestionViewController : UIPickerViewDelegate, UIPickerViewDataSource {
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return self.Menu.count
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return self.Menu[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let answer = Answer()
answer.id = 1
// Check if the textfield isFirstResponder.
if Question1TextField.isFirstResponder {
Question1TextField.text = self.Menu[row]
answer.Answer1 = Question1TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer1": self.Menu[row]], update: .modified)
}
} else if Question2TextField.isFirstResponder {
Question2TextField.text = self.Menu[row]
answer.Answer2 = Question2TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer2": self.Menu[row]], update: .modified)
}
} else if Question3TextField.isFirstResponder {
Question3TextField.text = self.Menu[row]
answer.Answer3 = Question3TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer3": self.Menu[row]], update: .modified)
}
} else if Question4TextField.isFirstResponder {
Question4TextField.text = self.Menu[row]
answer.Answer4 = Question4TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer4": self.Menu[row]], update: .modified)
}
} else if Question5TextField.isFirstResponder {
Question5TextField.text = self.Menu[row]
answer.Answer5 = Question5TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer5": self.Menu[row]], update: .modified)
}
} else if Question6TextField.isFirstResponder {
Question6TextField.text = self.Menu[row]
answer.Answer6 = Question6TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer6": self.Menu[row]], update: .modified)
}
} else if Question7TextField.isFirstResponder {
Question7TextField.text = self.Menu[row]
answer.Answer7 = Question7TextField.text
try! realm.write {
realm.create(Answer.self, value: ["id": 1, "Answer7": self.Menu[row]], update: .modified)
}
} else {
//log errors
}
}
}
extension QuestionViewController: ToolbarPickerViewDelegate {
func didTapDone() {
let row = self.pickerView.selectedRow(inComponent: 0)
self.pickerView.selectRow(row, inComponent: 0, animated: false)
selectedMenu = self.Menu[row]
self.view.endEditing(true)
}
func didTapCancel() {
self.view.endEditing(true)
}
}
Here is the Toolbar Class just incase.
import UIKit
protocol ToolbarPickerViewDelegate: class {
func didTapDone()
func didTapCancel()
}
class ToolbarPickerView: UIPickerView {
public private(set) var toolbar: UIToolbar?
public weak var toolbarDelegate: ToolbarPickerViewDelegate?
override init(frame: CGRect) {
super.init(frame: frame)
self.commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.commonInit()
}
private func commonInit() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(self.doneTapped))
let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(self.cancelTapped))
toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
toolBar.backgroundColor = UIColor(red: 0/255.0, green: 142.0/255.0, blue: 44.0/255.0, alpha: 0.5)
toolBar.tintColor = UIColor(red: 0/255.0, green: 142.0/255.0, blue: 44.0/255.0, alpha: 0.5)
UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor : UIColor(red: 0/255.0, green: 142.0/255.0, blue: 44.0/255.0, alpha: 1.0),
NSAttributedString.Key.font: UIFont(name: "Clinton", size: 14)], for: UIControl.State.normal)
self.toolbar = toolBar
}
@objc func doneTapped() {
self.toolbarDelegate?.didTapDone()
}
@objc func cancelTapped() {
self.toolbarDelegate?.didTapCancel()
}
}
extension String {
// formatting text for currency textField
func currencyFormatting() -> String {
if let value = Double(self) {
let formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.maximumFractionDigits = 0
if let str = formatter.string(for: value) {
return str
}
}
return ""
}
}
Why aren't methods like – pickerView:titleForRow:forComponent: part of UIPickerViewDataSource instead of UIPickerViewDelegate as it is currently? After all, the titles are data...
This seems very inconsistent to me. For example, UITableViewDataSource contains both the methods – tableView:cellForRowAtIndexPath: and – tableView:numberOfRowsInSection: which seems logical.
Why then for UIPickerView are the methods giving the number of rows and the methods giving the actual rows separated between UIPickerViewDataSource and UIPickerViewDelegate? Is there some logic to this I've missed?
How can I customise the height of a UIPickerView? I would like it to be taller more than 250.
I have done the following but I'm unable to set the given height.
-(void)pickerview:(id)sender
{
pickerView=[[UIPickerView alloc] initWithFrame:CGRectMake(0,200,320,400)];
pickerView.transform = CGAffineTransformMakeScale(0.75f, 0.75f);
pickerView.delegate = self;
pickerView.dataSource = self;
pickerView.showsSelectionIndicator = YES;
pickerView.backgroundColor = [UIColor lightGrayColor];
[pickerView selectRow:1 inComponent:0 animated:YES];
[self.view addSubview:pickerView];
// [contentView addSubview:pickerView];
}
I have an UIPickerView with 3 components populated with 2 NSMutableArrays (2 components have the same array).
A tutorial says:
//PickerViewController.m
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
NSLog(@"Selected Color: %@. Index of selected color: %i", [arrayColors objectAtIndex:row], row);
}
But I want to show the selected row for each component in an UIAlertViewafter the user touched an UIButton.
Is there a way to do this? Or must I just use 3 invisible UILabels as buffer?
Thanks in advance.