iphone UIPickerView question

Here's the situation, I'm a newb at this - so I could be totally on the wrong path.

I am building an app with multiple views; in one of those views I need the user to select from a dropdown list (UIPickerView) --> for simplicity let's call that view "PC" which has PC.h and PC.m files.

Through IB I was able to drop a UIPickerView object to the PC view, and I initialize that "object" in my ViewController.h and ViewController.m files. Meaning, I'm able to load the view, populate data in the view, etc. etc.

My challenge/problem is - I want the UIPicker to be hidden until the user clicks a button on the PC view, then I want to show the UI开发者_如何学GoPicker and hide it again once the user selects something from the menu.

I've searched and searched and can't find anything, so any help here is appreciated!

---

assuming that your UIPickerView instance (object) is called pv;

This is how your header-file may look like:

@interface YourViewController : UIViewController 
{
    IBOutlet UIPickerView *pv;
}

@property (nonatomic, retain) UIPickerView *pv;

@end

You then need to connect the pv-instance within the InterfaceBuilder to your Picker-View.

Trivial Approach:

somewhere in your viewDidLoad of the embedding view-controller:

pv.hidden = YES;

within the button action method (connected to your button-touch-up-instide event):

pv.hidden = NO;

within the action method of your "menu"

pv.hidden = YES;