更新一个uipicker

Question

我在uipicker中有两列。当我从第一列中选​​择某些内容时，我希望在另一列上更改选项。

任何人的源代码？

非常感谢

Answer 1

查看Apress的“Iphone 4开发”一书，第7章创建了一个从属选择器，你想要制作它（它被称为依赖uipickerview）。

Answer 2

尝试这样的事情 -

- (void)pickerView:(UIPickerView *)pickerView
      didSelectRow:(NSInteger)row
       inComponent:(NSInteger)component {
    if (component == 0) {

        //Here First Part of the Pickerview is represented using 0.
        // dependentPicker is the Pickerview outlet

        [dependentPicker selectRow:row inComponent:1 animated:YES];
        [dependentPicker reloadComponent:1];
    }
    else
    {
        [dependentPicker selectRow:row inComponent:0 animated:YES];
        [dependentPicker reloadComponent:1];
    }
}