iOS/iPhone Picker View (UIPickerView) Example (iPhone,iPad)

//
//  ViewController.h
//  pickerViewApp
//
//  Created by Weerachai on 11/10/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    IBOutlet UIPickerView *picker;
    IBOutlet UITextField *txtProvince;
    
    NSArray  *province;
}

- (IBAction)btnSelect:(id)sender;


@end

//
//  ViewController.m
//  pickerViewApp
//
//  Created by Weerachai on 11/10/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    [picker setHidden:TRUE];
    
    province = [[NSArray alloc] initWithObjects:
                @"กรุงเทพมหานคร", @"กระบี่", @"กาญจนบุรี",
                @"กาฬสินธุ์", @"กำแพงเพชร",
                @"ขอนแก่น", @"จันทบุรี", nil];
}

- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
    return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
    return [province count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView
             titleForRow:(NSInteger)row
            forComponent:(NSInteger)component
{
    return [province objectAtIndex:row];
}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
      inComponent:(NSInteger)component
{
    
    
    NSString *resultString = [[NSString alloc] initWithFormat:
                              @"%@",
                              [province objectAtIndex:row]];
    txtProvince.text = resultString;
    
    [picker setHidden:TRUE];
}

- (IBAction)btnSelect:(id)sender {
    [picker setHidden:FALSE];
}


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

- (void)dealloc {
    [picker release];
    [txtProvince release];
    [super dealloc];
}

@end