ios - 如何使用文本字段处理 TableView 单元格

Question

我的表格 View 单元格包含一个标签和一个文本字段，我正在重复使用我的单元格并且它正在工作。但是当我在第一个文本字段中输入文本并按回车键时，我想转到下一个文本字段，我该如何处理？

Answer 1

这就是我所做的:

1. 使用以下方法创建了委托(delegate)协议(protocol):

   - (void)textFieldInCellDidReturn:(UITableViewCell*)cell;
   - (void)textFieldInCellDidBeginEditing:(UITableViewCell*)cell;
   - (void)textFieldInCellDidEndEditing:(UITableViewCell*)cell;
   

2. 在单元格中:

   -(BOOL)becomeFirstResponder
   {
       return [self.inputTextField becomeFirstResponder];
   }
   
   -(void)textFieldDidBeginEditing:(UITextField *)textField
   {
       if ([self.delegate respondsToSelector:@selector(textFieldInCellDidBeginEditing:)])
       {
           [self.delegate textFieldInCellDidBeginEditing:self];
       }
   }
   -(void)textFieldDidEndEditing:(UITextField *)textField
   {
       if ([self.delegate respondsToSelector:@selector(textFieldInCellDidEndEditing:)])
       {
           [self.delegate textFieldInCellDidEndEditing:self];
       }
   }
   -(BOOL)textFieldShouldReturn:(UITextField *)textField
   {
       if ([self.delegate respondsToSelector:@selector(textFieldInCellDidReturn:)])
       {
           [self.delegate textFieldInCellDidReturn:self];
       }
       return NO;
   }
   

3. 在 View Controller 和 TableView 委托(delegate)中，声明 iVar NSIndexPath* indexPathOfFirstResponder 并采用委托(delegate)

   - (void)textFieldInCellDidBeginEditing:(UITableViewCell *)cell
   {
       indexPathOfFirstResponder = [self.theTable indexPathForCell:cell];
   }
   
   -(void)textFieldInCellDidReturn:(UITableViewCell *)cell
   {
       NSIndexPath* indexPathForCell = [self.theTable indexPathForCell:cell];
       if(indexPathForCell.row < [self.theTable numberOfRowsInSection:indexPathForCell.section]-1)
       {
           NSIndexPath* nextIndexPathInSection = [NSIndexPath indexPathForRow:indexPathForCell.row+1 inSection:indexPathForCell.section];
           UITableViewCell* nextCellInSection = [self.theTable cellForRowAtIndexPath:nextIndexPathInSection];
           if (nextCellInSection)
           {
               [nextCellInSection becomeFirstResponder];
           }
           else
           {
               indexPathOfFirstResponder = nextIndexPathInSection;
               [self.theTable scrollToRowAtIndexPath:nextIndexPathInSection atScrollPosition:(UITableViewScrollPositionMiddle) animated:YES];
           }
       }
       else
       {
           [self.theTable endEditing:YES];
       }
   }
   
   -(void)textFieldInCellDidEndEditing:(UITableViewCell *)cell
   {
       indexPathOfFirstResponder = nil;
   }
   
   -(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
   {
       if ([indexPath isEqual:indexPathOfFirstResponder])
       {
           [cell becomeFirstResponder];
       }
   }