Question

问题是我有自定义单元格的tableview。在单元格里面，我有一个按钮。单击该按钮时，它应该更改tableview之外的标签文本。

编辑：我试图改变的标签文字是另一种观点。 ViewController有一个tableview和一个标签视图。在tableview内部是一个按钮，单击它时会更改标签的视图文本。

CustomCell和TableSource：

        //Stores the response object that will be sent back to the android client
        OutgoingWebResponseContext response = WebOperationContext.Current.OutgoingResponse;
        String description = "User added";
        response.StatusCode = System.Net.HttpStatusCode.OK;

        //Tries to add the new user
        try
        {
            userTable.Insert(username,firstname,lastname,email,hash);
        }
        catch (SqlException e)
        {
            //Default response is a conflict
            response.StatusCode = System.Net.HttpStatusCode.Conflict;

            description = "Bad Request (" + e.Message + ")";

            //Check what the conflict is
            if (userTable.GetData().AsEnumerable().Any(row => username == row.Field<String>("username")))
            {
                description = "Username in use";
            }
            else if (userTable.GetData().AsEnumerable().Any(row => email == row.Field<String>("email")))
            {
                description = "Email address in use";
            }
            else
            {
                response.StatusCode = System.Net.HttpStatusCode.BadRequest;
            }
        }

        //display and respond with the description
        Console.WriteLine(description);
        response.StatusDescription = description;
    }

查看控制器：

namespace Testing.iOS
{
    public partial class CustomCell : UITableViewCell
    {

        // Code omitted

        public class TableSource : UITableViewSource
        {  
            ViewController vc = new ViewController();

            public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
            {
                var cell = tableView.DequeueReusableCell (CustomCell.Key) as CustomCell;

                if (cell == null) 
                {
                    cell = new CustomCell ();
                    var views = NSBundle.MainBundle.LoadNib("CustomCell", cell, null);
                    cell = Runtime.GetNSObject( views.ValueAt(0) ) as CustomCell;
                }

                cell.btn.TouchUpInside += (object sender, EventArgs e) => 
                {     
                    // Change label that is outside tableview
                    vc.updateLabel();
                };

                // Code omitted

                return cell;
            }
        }
    }
}

Answer 1

使用协议和代理。首先在CustomCellDelegate类中使用方法CustomCell编写updateLabel()协议，并将self作为参数之一传递。

-(void)updateLabelForCell:(UITabelViewCell *)cell;

并在updateLabel()方法中调用委托方法

[self updateLabelForCell:self];

然后在ViewController类中实现委托方法。基于名为update的标签的函数。将ViewController设置为tableviewcell的委托。

Answer 2

在cellForRowAtIndexPath方法中添加以下代码

[CustomCell.buttonOutlet addTarget:self action:@selector(BtnClicked:) forControlEvents:UIControlEventTouchUpInside];

然后用BtnClicked方法处理你的逻辑。

-(void)BtnClicked:(UIButton *)sender{

       labelOutlet.text = @"new text";

}

单击tableview中的按钮时，如何更改tableview外的标签文本

2 个答案: