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iphoneobjective-cuipicker

UIPicker specific question(iphone)

I am starting to learn to use the UIPicker in an application. what I want to do is that when the user clicks on the zipcode textbox, I want the uipicker to pop up and display list of zipcodes available. Just like a drop down in c# or VB.net. Do I have to create a new view and place the uipicker there? Thanks

Solution

  • In order to have a UIPickerView appearing in your app you do not need an additional view.

    Assuming you are in a UIViewController:

    @interface MyController : UIViewController {
    UIPickerView* mPicker;
}
-(void)showPicker;
-(void)hidePicker;
@end

-(void)showPicker {
    [self.view addSubview:mPicker];
    mPicker.center = CGPoint // set out of sight

    [UIView beginAnimations:nil context:nil];
    // do your transformations
    [UIView commitAnimations];
}

-(void)hidePicker {
    // do your exit animations
}

    You can also add a delegate function to the second animations to remove the mPicker from the superview.

    For more information have a look at the UIView Reference.