Question

我知道即时提出一个非常常见的问题。但在经历了很多类似的问题和文章后我无法理解

如何在didSelectRowAtIndexPath委托方法中访问UITableViewCell内的UITextfield。

我发布下面的代码。我可能不会按照预期的方式去...但

我想在didSelectRowAtIndexPath中创建textfield（所选行）[becomeFirstResponder] 这样我就可以在下面的文本字段中显示uiPicker。请帮帮我。

   - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];


        if(self.isTableForHospital)
        {
            UIView *myview=[self createRowViewForHospitalTable:[customArray objectAtIndex:indexPath.row]];
            myview.tag=indexPath.row;
            [cell addSubview:myview];
            cell.selectionStyle=UITableViewCellSelectionStyleNone;
        }
        else
        {
            cell.textLabel.text=[customArray objectAtIndex:indexPath.row];
        }
    }
    return cell;
}

-(UIView *)createRowViewForHospitalTable:(NSString *)rowText
{
    UIView *hospital_row_view=[[UIView alloc]init];
    UILabel *lblRowText=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 300, 50)];
    lblRowText.text=rowText;

    txtDepartment=[[UITextField alloc]initWithFrame:CGRectMake(310, 0, 185, 30)];
        //...rest styling for textfield goes here..
    txtRole=[[UITextField alloc]initWithFrame:CGRectMake(495, 0, 185, 30)];

    [hospital_row_view addSubview:lblRowText];
    [hospital_row_view addSubview:txtDepartment];
    [hospital_row_view addSubview:txtRole];
    return  hospital_row_view;
}

- (void)textFieldDidEndEditing:(UITextField *)textField {  }

- (void)textFieldFinished:(id)sender{
    NSString *value=@"sa";
    [sender resignFirstResponder];
}

// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{    
    UITableViewCell *cellSelected = [tableView cellForRowAtIndexPath: indexPath];

    UIView *myview=[cellSelected.contentView viewWithTag:indexPath.row];
    for(UIView *item in [myview subviews])
    {
        if([item isKindOfClass:[UITextField class]])
        {
            [item becomeFirstResponder];        
        }
    }
}

Answer 1

在迭代单元子视图和获取UITextField方面，我想我有你的答案。

我在另一个帖子here上找到了这个，并将其修改为更通用：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    UITextField* textField = [[UITextField alloc] init];

    UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];

    UIView* subview = [[cell.contentView subviews] lastObject]; // Make sure your UITextField really *is* the last object you added.

    if ([subview isKindOfClass:[UITextField class]]) {
        textField = (UITextField*)subview;
    }

    [textField becomeFirstResponder];

}

...其中“textField”是实际文本字段对象的占位符。希望这有帮助！

Answer 2

我认为你不需要为文本字段分配init，因为它最终会指向单元格的文本字段（如果有的话）。

我相信你是在不必要地分配它。

循环遍历didSelectRowAtIndexPath中的自定义单元格的子视图以获取UITextField文本

2 个答案: