Using UIPickerView to populate UITextView within a UIViewController .xib framework

Question

Let me preface by saying that I am completely new to programming. I have also done a bunch of searching on this issue and haven't found an answer that seems to address exactly what I am doing.

The result I am looking for is a text field that can be populated by the user by using a pickerView. After putting a UITextView box in the .xib file I am not sure how make it call a pickerView when tapped and then populate from that picker view.

Thank you for any help given. Let me know if I need to clarify more.

Answer 1

Create a UIPickerView and set it as the inputView property of your UITextView. Then, register your class for the dataSource/delegate of the UIPickerView to populate it and know when it has changed selection. Below is a simple solution for a picker with a single component.

SomeViewController.h:

@interface SomeViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate>
{
    UIPickerView *picker;
    NSArray *dataSource;
}

SomeViewController.m:

- (void)viewDidLoad
{
    [super viewDidLoad];

    picker = [[UIPickerView alloc] init];
    picker.dataSource = self;
    picker.delegate = self;

    myTextView.inputView = picker;
}

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

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

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

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    [myTextView setText:[dataSource objectAtIndex:row]];
}