Question

我有两个文本视图，他们都从同一个对话框中获取文本。以下方法有效。

但是如你所见，我对两个textview都做了同样的事情，唯一的区别是他们的资源ID。有更好的办法吗？

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{ 
  ........
  var firstPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon1);
  firstPickerDialog.Click += OnFirstPickerDialogClick;
  var secondPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon2);
  secondPickerDialog.Click += OnSecondPickerDialogClick;
  return view;
}

void OnFirstPickerDialogClick(object sender, System.EventArgs e)
{
  var dialog = new PickerDialogView(ViewModel.Test1);
  dialog.DateSelected += (s, date) => ViewModel.Test1 = date;
  dialog.Show(((MainView)Activity).SupportFragmentManager, "PickerDialogView");
}

void OnSecondPickerDialogClick(object sender, System.EventArgs e)
{
  var dialog = new PickerDialogView(ViewModel.Test2);
  dialog.DateSelected += (s, date) => ViewModel.Test2 = date;
  dialog.Show(((MainView)Activity).SupportFragmentManager, "PickerDialogView");
}

Answer 1

也许是这样的？

var firstPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon1);
firstPickerDialog.Click += (s,e) => SelectDate(ViewModel.Test1, d => ViewModel.Test1 = d);
var secondPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon2);
secondPickerDialog.Click += (s,e) => SelectDate(ViewModel.Test2, d => ViewModel.Test2 = d);


void SelectDate(DateTime currentDate, Action<DateTime> setter)
{
    var dialog = new PickerDialogView(currentDate);
    dialog.DateSelected += (s, date) => setter(date);
    dialog.Show(((MainView)Activity).SupportFragmentManager, "PickerDialogView");
}

但这可能会导致内存问题，因为您不会取消注册事件。我是这样做的：

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{ 
    //........
    var firstPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon1);
    firstPickerDialog.Click += OnFirstPickerDialogClick;
    var secondPickerDialog = view.FindViewById<ImageView>(Resource.Id.icon2);
    secondPickerDialog.Click += OnSecondPickerDialogClick;
    return view;
}

void OnFirstPickerDialogClick(object sender, System.EventArgs e)
{
    SelectDate(ViewModel.Test1, d => ViewModel.Test1 = d);
}

void OnSecondPickerDialogClick(object sender, System.EventArgs e)
{
    SelectDate(ViewModel.Test2, d => ViewModel.Test2 = d);
}

void SelectDate(DateTime currentDate, Action<DateTime> setter)
{
    var dialog = new PickerDialogView(currentDate);
    dialog.DateSelected += (s, date) => setter(date);
    dialog.Show(((MainView)Activity).SupportFragmentManager, "PickerDialogView");
}

然后你可以简单地调用

firstPickerDialog.Click -= OnFirstPickerDialogClick;
secondPickerDialog.Click -= OnSecondPickerDialogClick;

清理它。您的dialog.DateSelected += ...有同样的问题。

永远记住小孩：每个+ =应该有一个 - =对方否则内存boogeyman会来找你：）

同一个对话框上有两个TextView

1 个答案: