Why isn't the UIPickerView widthForComponent delegate method called everytime the view appears?

Question

I\'ve got two controls on an iPhone screen - a TableView and a UIPickerView. When you select the single cell in the TableView you\'re taken to another screen where you\'re show

Answer 1

Actually, just using setNeedsLayout will also work and might be a bit cleaner.

[picker reloadAllComponents];
[picker setNeedsLayout];

Answer 2

It turns out that if you reset the picker's delegate, the component widths are redrawn each time a selection is made. The modified code looks like this:

-(void)viewWillAppear:(BOOL)animated {

 ....

 self.PopulatePickerArray; // Populate components based on selection

 sizePicker.delegate = nil; // NEW CODE
 sizePicker.delegate = self; // NEW CODE

 [picker reloadAllComponents];

}

Found info on this web page - Changing-Width-UIPicker-Continually

Answer 3

I am not sure, but you can try to call [pickerView reloadAllComponents]; in your viewWillAppear method.

  if(currentNumbersOfComponents < 4){
    currentNumbersOfComponents++;
    [picker reloadAllComponents];
}

The numberOdComponents method returns currentNumberOfComponents