Question

I am trying to pass my UItextfield value over to a UIPicker that I have loading in a alertview I’m just not sure what functions are available to me to get the values back into the picker?

At a guess I should be doing something in my

- (NSInteger)pickerView:(UIPickerView*)pv numberOfRowsInComponent:(NSInteger)component
{
    if (pv == pickerViewA) {
        return 10;
    }
    else
        return 16;
}

but looking at the developers notes their is not much info about the UIPickerViewDataSource other than returning number of rows…

any help would be greatly appreciated.

Answer 1

There are other data source and delegates as-

//for title of a row in a component
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

//for width of a componenet
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component

//for row height of a component
-(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component

//for number of components 
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView

for more info look at documentation –
http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIPickerViewDelegate_Protocol/Reference/UIPickerViewDelegate.html

and

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIPickerView_Class/Reference/UIPickerView.html