Question

我有一个表视图，我在其中添加一个自定义单元格。在自定义单元格中，我有一个文本字段。在该文本字段中，我想从选择器视图中插入值。当用户单击文本字段时，将打开选择器视图。我为此目的有以下代码，但我没有在文本字段中获得价值。代码..

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *) indexPath 
    {    
        NSString *identifier = [NSString stringWithFormat:@"%d-%d",indexPath.section,indexPath.row];
        cell_object = (Custom_cell2 *)[tableView dequeueReusableCellWithIdentifier:identifier]; 
        if(cell_object == nil) 
        {
            [[NSBundle mainBundle] loadNibNamed:@"Custom_cell2" owner:self options:nil];
        }

        // Configure the cell...
        cell_object.selectionStyle=UITableViewCellSelectionStyleNone;
        cell_object.txt_name.backgroundColor=[UIColor clearColor];
        cell_object.txt_name.userInteractionEnabled=NO;
        NSArray *array = [array_from objectAtIndex:indexPath.section];
        NSString *cellValue = [array objectAtIndex:indexPath.row];  
        cell_object.txt_name.text = [NSString stringWithFormat:@"%@",cellValue];
        cell_object.txt_time.backgroundColor=[UIColor whiteColor];
        cell_object.txt_time.textColor=[UIColor blackColor];
        //cell_object.txt_time.userInteractionEnabled=NO;
        //cell_object.txt_time.text =@"";
        return cell_object;
    }

上面的自定义单元格代码。

    -(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
    {
        myPicker.hidden=FALSE;
        UIToolbar *tool = [[UIToolbar alloc] initWithFrame:CGRectMake(0,0, 320, 44)]; //better code with variables to support view rotation
        tool.tintColor=[UIColor blackColor];
        UIBarButtonItem *space=[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil] autorelease];
        UIBarButtonItem *doneButton =[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(done)] autorelease];
        //using default text field delegate method here, here you could call
        //myTextField.resignFirstResponder to dismiss the views
        [tool setItems:[NSArray arrayWithObjects: space,doneButton,nil] animated:NO];
        cell_object.txt_time.inputAccessoryView = tool;
        [myPicker addSubview:tool];
        //you can -release your doneButton and myToolbar if you like
        [[[UIApplication sharedApplication] keyWindow] addSubview:myPicker];        
        return NO;
    }

    - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent: (NSInteger)component
    {
        if (pickerView == myPicker)
        {
            [cell_object.txt_time setText:[NSString stringWithFormat:@"%@",[array_time objectAtIndex: [pickerView selectedRowInComponent:0]]]];
            [table_routine reloadData];
        }
    }

当我点击cell_object.txt_time然后出现一个选择器视图，但它没有从文本提交的选择器中插入值。

这段代码中有什么错误？

提前致谢...

Answer 1

[pickerView selectRow：1 inComponent：0 animated：NO]; textField.text = [array_name objectAtIndex：[pickerView selectedRowInComponent：0]];

您可以尝试使用此代码从pickerview选择中添加文本...

Answer 2

当您要将myPicker添加为subView时，请确认您已设置并在代码中添加以下行。

    myPicker.delegate = self;

Answer 3

实际上你不能像这样设置UITableViewCell textlLabel的值。对于tableView中的任何更改，您必须重新加载它或单独重新加载Cell。

解决方案是创建一个数组并将pickerView值存储在该数组中。

然后在cellForRowAtIndexPath：

cell_object.txt_time setText: [array objectAtIndex: indexPath];

试试这个..

当用户点击文本字段时，如何从pickerview在自定义单元格的文本字段中插入值？

3 个答案: