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UIPickerView - Add Programmatically

ViewController.h

//
//  ViewController.h
//  PickerViewExample
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIPickerViewDelegate,UIPickerViewDataSource>{

}

@property (strong, nonatomic) IBOutlet UITextField *myTextField;
@property (nonatomic,retain) UIPickerView *myPickerview;
@property (nonatomic,retain) NSArray *myPickerArray;

@end

ViewController.m

//
//  ViewController.m
//  PickerViewExample
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize myTextField,myPickerview,myPickerArray;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    myPickerArray = @[@"Math",@"Physics",@"Chemistry",@"English",@"Computer Science"];
    // new ClassName();
    myPickerview = [[UIPickerView alloc]init];
    [myPickerview setDataSource:self];
    [myPickerview setDelegate:self];
   // myPickerview.delegate = self;
   // myPickerview.dataSource = self;
    [myTextField setInputView:myPickerview];
    
    
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [[self view]endEditing:YES];
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - UIPickerDataSource Functions
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{

    return 1;
}

// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{

    return  [myPickerArray count];
}

#pragma mark - UIPickerDelegate Functions
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    return [myPickerArray objectAtIndex:row];

}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
// when PickerView Items is selected
    [myTextField setText:[myPickerArray objectAtIndex:row]];
    [[self view]endEditing:YES];
}

@end

iOS

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35) Reverse (Unwind) Segue
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36) ViewController - Segue - Messages
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37) WebService Example
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38) CoreData Example

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