UIPickerView touch issue

[jun0683]

can i use UIPickerView?

i tried add UIPickerView at dataviewcontoller ,but hasn't occurred scroll touch event ,but occurred scroll touch down event

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self != nil) {
        UIPickerView *ticketPickerView = [[UIPickerView alloc] initWithFrame:pickerViewFrame];
        ticketPickerView.showsSelectionIndicator= YES;
        ticketPickerView.userInteractionEnabled = YES;
        ticketPickerView.delegate = self;
        ticketPickerView.dataSource = self;
        [self.view addSubview:ticketPickerView];
    }
}