在自定义 UITableViewCell 中多次调用 UIButton 单击事件 [英] UIButton click event getting called multiple times inside custom UITableViewCell

问题描述

我有一个自定义的 UITableViewCell，其中有一个 UIButton.单击按钮时，单击事件会被多次调用.这是我正在使用的代码.

I have a custom UITableViewCell which has an UIButton in it. When the button is clicked the click event is getting called multiple times. Here is the code what i am using.

CustomCell.cs

public static CustomCell Create ()
{
    return ( CustomCell ) Nib.Instantiate ( null , null ) [0];
}

internal void BindData()
{
    //some code

    btnSave.TouchUpInside+= (object sender, EventArgs e) => 
    {
        Console.WriteLine("button clicked");
    };
}

TableSource.cs

public override UITableViewCell GetCell (UITableView tableView,NSIndexPath indexPath)
{
    CustomCell cell = tableView.DequeueReusableCell ( CustomCell.Key ) as CustomCell ??  CustomCell.Create ();
    cell.BindData ();
    return cell;
}

知道为什么会这样吗?我是否正确地重复使用细胞?

Any idea why is this happening? am i reusing the cells properly?

谢谢.

推荐答案

我相信你不应该每次都调用 cell.BindData()，只有在你创建一个新的单元格时才调用.否则，您每次重复使用单元时都会运行它.

I believe you should not call cell.BindData() every time, only when you create a new cell. Otherwise you will be running it every time you re-use your cell.

分离绑定数据的东西...拉出按钮触摸

separate the bind data stuff... pull out the button touch

internal void BindData()
{
    //some code
}

然后把按钮的东西放在这里.

and then put the button stuff in here.

var cell = tableView.DequeueReusableCell(CustomCell.Key) as CustomCell;

if (cell == null)
{
    cell = CustomCell.Create ()
    cell.btnSave.TouchUpInside+= (object sender, EventArgs e) => 
    {
        Console.WriteLine("button clicked");
    };
}

cell.BindData ();

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