How to Set a Default Value of a Uipickerview

How to set a default Value of a UIPickerView

TL:DR version:

//Objective-C
[self.picker selectRow:2 inComponent:0 animated:YES];
//Swift
picker.selectRow(2, inComponent:0, animated:true)

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Either you didn't set your picker to select the row (which you say you seem to have done but anyhow):

- (void)selectRow:(NSInteger)row inComponent:(NSInteger)component animated:(BOOL)animated

OR you didn't use the the following method to get the selected item from your picker

- (NSInteger)selectedRowInComponent:(NSInteger)component

This will get the selected row as Integer from your picker and do as you please with it.
This should do the trick for yah. Good luck.

Anyhow read the ref:
https://developer.apple.com/documentation/uikit/uipickerview

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EDIT:

An example of manually setting and getting of a selected row in a UIPickerView:

the .h file:

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>
{
    UIPickerView *picker;
    NSMutableArray *source;
}

@property (nonatomic,retain) UIPickerView *picker;
@property (nonatomic,retain) NSMutableArray *source;

-(void)pressed;

@end

the .m file:

#import "ViewController.h"

@interface ViewController ()

@end
@implementation ViewController

@synthesize picker;
@synthesize source;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

- (void) viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    self.view.backgroundColor = [UIColor yellowColor];

    self.source = [[NSMutableArray alloc] initWithObjects:@"EU", @"USA", @"ASIA", nil];

    UIButton *pressme = [[UIButton alloc] initWithFrame:CGRectMake(20, 20, 280, 80)];
    [pressme setTitle:@"Press me!!!" forState:UIControlStateNormal];
    pressme.backgroundColor = [UIColor lightGrayColor];
    [pressme addTarget:self action:@selector(pressed) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:pressme];

    self.picker = [[UIPickerView alloc] initWithFrame:CGRectMake(20, 110, 280, 300)];
    self.picker.delegate = self;
    self.picker.dataSource = self;
    [self.view addSubview:self.picker];

    //This is how you manually SET(!!) a selection!
    [self.picker selectRow:2 inComponent:0 animated:YES];
}

//logs the current selection of the picker manually
-(void)pressed
{
    //This is how you manually GET(!!) a selection
    int row = [self.picker selectedRowInComponent:0];

    NSLog(@"%@", [source objectAtIndex:row]);
}

- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
    return 1;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
    return [source count];
}

- (NSString *)pickerView:(UIPickerView *)pickerView
             titleForRow:(NSInteger)row
            forComponent:(NSInteger)component
{
    return [source objectAtIndex:row];
}

#pragma mark -
#pragma mark PickerView Delegate
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
      inComponent:(NSInteger)component
{
//    NSLog(@"%@", [source objectAtIndex:row]);
}

@end

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EDIT for Swift solution (Source: Dan Beaulieu's answer)

Define an Outlet:

@IBOutlet weak var pickerView: UIPickerView!  // for example

Then in your viewWillAppear or your viewDidLoad, for example, you can use the following:

pickerView.selectRow(rowMin, inComponent: 0, animated: true)
pickerView.selectRow(rowSec, inComponent: 1, animated: true)

If you inspect the Swift 2.0 framework you'll see .selectRow defined as:

func selectRow(row: Int, inComponent component: Int, animated: Bool) 

option clicking .selectRow in Xcode displays the following:

Set a default Value of a UIPickerView: index beyond bounds

Index starts from 0. So you should modify it to this:

spinner.selectRow(3, inComponent: nivel, animated: true)

Set default value of UIPickerView when UITextField is touched

Implement the textFieldDidBeginEditing text field delegate method and set the text field's text if it doesn't already have a value.

func textFieldDidBeginEditing(_ textField: UITextField) {
    if textField.text!.isEmpty {
        // set the text as needed
    }
}

UIPickerView default row

Set the picker view's selected row to whatever initial row you want in the viewDidLoad method. Here's Swift 3 code. Adjust as needed for Swift 2.

self.picker.selectRow(8, inComponent: 0, animated: false)

Set a default value for UIPickerView in Swift?

This is the code I have used in one of my apps:

// Declare the outlet to the picker in your storyboard
@IBOutlet var myPicker: UIPickerView!

//...

override func viewDidLoad() {
//...
    myPicker.selectRow(row, inComponent: 0, animated: true)
}

Obviously, replace row and 0 with whatever values you want.

Hope this Helps!

Can't set default value UIPicker swift 2

Updated your code.

You didn't set the pickerView.dataSource!

If i understood your question, you want an element to be selected by default, other than element at index 0.
I also added that.

import UIKit

class CustomCell: UITableViewCell, UIPickerViewDataSource, UIPickerViewDelegate {

    @IBOutlet weak var answer: UITextField!

    var delegate: QuestionSelectorCellDelegate?
    var pickOption: [String] = []
    var pickerView:UIPickerView  = UIPickerView()

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    @IBAction func editBeginQuestionSelectorCell(sender: UITextField) {
        pickerView = UIPickerView()
        pickerView.delegate = self

        // --- Thats what I added ---
        pickerView.dataSource = self
        let indexOfDefaultElement = 1 // Make sure that an element at this index exists
        pickerView.selectRow(indexOfDefaultElement, inComponent: 0, animated: false)

        sender.inputView = pickerView
    }

    func displayBlock(block: Block){
        if block.answers != nil {
            pickOption = block.answers! // block.answers! = ["blue","red","green"] for example
        }

    }

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return pickOption.count
    }

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return pickOption[row]
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if row < pickOption.count {
            answer.text = pickOption[row]
            delegate?.updateQuestionSelectorCell(self, rep: pickOption[row])
        }
    }
}

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