TestTwoController.h

#import <UIKit/UIKit.h>

@interface TestTwoController : UIViewController  <UITextFieldDelegate,UIPickerViewDataSource,UIPickerViewDelegate>

@end

TestTwoController.m

#import "TestTwoController.h"

@interface TestTwoController ()

@property (strong, nonatomic) IBOutlet UIPickerView *picker;
@property (strong, nonatomic) NSArray *pickerArray;

@property (strong, nonatomic) IBOutlet UIPickerView *picker2;
@property (strong, nonatomic) NSArray *picker2Array;

@property (weak, nonatomic) IBOutlet UITextField *textField;
@property (weak, nonatomic) IBOutlet UITextField *textField2;

@end

@implementation TestTwoController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.pickerArray  = [[NSArray alloc] initWithObjects:@"female", @"male", @"it's complicated", nil];
    self.picker2Array  = [[NSArray alloc] initWithObjects:@"13-15", @"16-19", @"20-29", @"30-39", @"40-49", @"50-59", @"60-69", @"70-79", @"80-89", @"90-99", @"100-110", @"over 110", nil];
    
    self.picker = [[UIPickerView alloc] initWithFrame:CGRectZero];
    self.picker2 = [[UIPickerView alloc] initWithFrame:CGRectZero];

    [self attachPickerToTextField:self.textField :self.picker];
    [self attachPickerToTextField:self.textField2 :self.picker2];

}

- (void)attachPickerToTextField: (UITextField*) textField :(UIPickerView*) picker{
    picker.delegate = self;
    picker.dataSource = self;
    
    textField.delegate = self;
    textField.inputView = picker;
    
}


#pragma mark - Keyboard delegate stuff

// let tapping on the background (off the input field) close the thing
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [self.textField resignFirstResponder];
    [self.textField2 resignFirstResponder];
}

#pragma mark - Picker delegate stuff

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


- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    if (pickerView == self.picker){
        return self.pickerArray.count;
    }
    else if (pickerView == self.picker2){
        return self.picker2Array.count;
    }
    
    return 0;
}

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row   forComponent:(NSInteger)component
{
    if (pickerView == self.picker){
        return [self.pickerArray objectAtIndex:row];
    }
    else if (pickerView == self.picker2){
        return [self.picker2Array objectAtIndex:row];
    }
    
    return @"???";
    
    
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row   inComponent:(NSInteger)component
{
    if (pickerView == self.picker){
        self.textField.text = [self.pickerArray objectAtIndex:row];
    }
    else if (pickerView == self.picker2){
        self.textField2.text = [self.picker2Array objectAtIndex:row];
    }
    
}


@end

Slick and Simple, that's all what i can say about it. i ve been trying so many complicated solutions and none of them worked as charm as yours. thanx a million

Super simple. Great job. Thanks Kathleen.