Question

I have created two UITextFields and want to create two different UIPickerViews for both the textFields with different values and how to map the individual textFields to each pickerView specifically?
any help ?

Answer 1

First of all create two array that contain different value that you want to display in the diff picker, we say aray1 and ary2 .

Now add this in .h file

  @interface YourViewController : UIViewController<UITextFieldDelegate,UIPickerViewDelegate, UIPickerViewDataSource>
    {

        UIToolbar* keyboardDoneButtonView;
        UIPickerView *pickerView;
        NSString * txtFieldSelected;
        NSArray *ary2;
        NSArray *ary1;
    }

And in .h file

 - (void)viewDidLoad

        {
            [super viewDidLoad];
            firstTF.delegate = self;
            secondTF.delegate = self;
            ary1 =[NSArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8", nil];
           ary2 =[NSArray arrayWithObjects:@"a",@"s",@"d",@"f",@"g",@"h",@"x",@"c", nil];
        }

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{

        if (textField == firstTF) {
            txtFieldSelected = @"firstTF";
        }else if (textField == secondFF) {
            txtFieldSelected = @"secondTF";
        }
        CGRect pickerFrame = CGRectMake(0, 40, 0, 0);  

        pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];  
        pickerView.showsSelectionIndicator = YES;  
        pickerView.dataSource = self;  
        pickerView.delegate = self;  

        keyboardDoneButtonView = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];  
        keyboardDoneButtonView.barStyle     = UIBarStyleBlackTranslucent;  
        [keyboardDoneButtonView sizeToFit];  

        NSMutableArray *barItems = [[NSMutableArray alloc] init];

        UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];  
        [barItems addObject:cancelBtn];  

        UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];  
        [barItems addObject:flexSpace];  

        UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)];  
        [barItems addObject:doneBtn];  


        [keyboardDoneButtonView setItems:barItems animated:YES]; 
        textField.inputAccessoryView = keyboardDoneButtonView;

        textField.inputView = pickerView;


    return YES;
}


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


- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{
    if (txtFieldSelected == @"firstTF") {
        return ary1.count;
    }else if (txtFieldSelected == @"secondTF") {
        return ary2.count;
    }
    return 1;

}

-(void)doneButtonPressed:(id)sender{  
    if (txtFieldSelected == @"firstTF") {
        [firstTF resignFirstResponder];

    }else if (txtFieldSelected == @"secondTF") {

        [secondTF resignFirstResponder];
    }
}  

-(void)cancelButtonPressed:(id)sender{ 

    if (txtFieldSelected == @"firstTF") {
        [firstTF resignFirstResponder];

    }else if (txtFieldSelected == @"secondTF") {
        [secondTF resignFirstResponder];

    }
}  


- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
    // called when a row is selected

    if (txtFieldSelected == @"firstTF") {

        firstTF.text = [ary1 objectAtIndex:row];
    }else if (txtFieldSelected == @"secondTF") {
        secondTF.text = [ary2 objectAtIndex:row];

    }

}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    if (txtFieldSelected == @"firstTF") {
        return [ary1 objectAtIndex:row];
    }else if (txtFieldSelected == @"secondTF") {
        return [ary2 objectAtIndex:row];
    }

    return @"Good Day";
}