从选取器中的选定行读取值

Question

我在Xcode中创建了带有3列，2和3列的选择器，根据第一列中的数据填充了数据。它运行正常，数据正确显示，我唯一的问题是如何编写当前显示2和3.列的选定行的值到某个字符串？

谢谢。

Answer 1

使用 - [UIPickerView selectedRowInComponent:]确定选择了哪一行，然后在数据数组中的该索引处返回该对象。

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

   NSInteger selectedRow = [pickerView selectedRowInComponent:0];
    NSString *selectedPickerRow=[yourArrayOfElements objectAtIndex:selectedRow];


    // Handle the selection
}

Answer 2

实施didSelectRow委托

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


  NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
  UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
  NSString *cellText = [NSString stringWithString: cell.textLabel.text];


   NSIndexPath *indexPath1 = [NSIndexPath indexPathForRow:row+1 inSection:0];
   UITableViewCell *cell1 = [self.tableView cellForRowAtIndexPath:indexPath1];
   NSString *cell1Text = [NSString stringWithString: cell1.textLabel.text];

   NSIndexPath *indexPath2 = [NSIndexPath indexPathForRow:row+2 inSection:indexPath.section];
   UITableViewCell *cell2 = [self.tableView cellForRowAtIndexPath:indexPath2];
   NSString *cell2Text = [NSString stringWithString: cell2.textLabel.text];

}