Iphone, pickerView controller.

I tried many ways, but was not successful. I have to make use of a picker. First it should have 2 components, secondly One component and finally one component. there is button,afte开发者_开发技巧r pressing this button the picker components should change as above. If there is any way please share it.

[picker reloadData];

use this in your IBAction also use int variable suppose int checker (0 for two component,1 and 1 for 1 component)

the in IBAction write code like this

checker++;
  if(checker>2)
    checker=0;
   [picker reloadData];

and it numberOfComponents datasource method use this checker for making your if else

look like this

if(checker>0)
   return 1;
else 
  return 2;

remember checker must be global type.