title: Showing a particular date in UIDatePicker in UIDatePickerModeDate on the iPhone
body: <p>I have an <code>NSString</code> object that contains the string <code>2013-02-28</code>. By default, the <code>UIDatepicker</code> shows the current date, but I want to show whatever date I had in the <code>NSString</code> object.</p>
  
  <p>I am converting the <code>NSString</code> object into <code>NSDate</code> and I don't know how to set that date on <code>UIDatePicker</code> in <code>UIDatePickerModeDate</code>. How could I do this?  I have tried the <code>setDate:</code> method, but it's not working.</p>