使用UIPickerView的NumberOfRowsInComponent正确注册我从核心数据返回的int 16值

I have a Book data entity that has as an attribute an int 16 type value called numBooks. Due to the way everything is setup, I am actually grabbing the number I need inside titleForRow, and saving the value to a global variable of type NSNumber.I have a Book data entity that has as an attrib