我有一组单元格(StackLayout类型),它们都在WrapLayout中。我似乎无法弄清楚如何使其重新排序,类似于Drag & Drop ListView。
这是WrapLayout:
WrapLayout layout = new WrapLayout
{
Spacing = 5,
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(5, Device.OnPlatform(20, 5, 5), 5, 5),
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
};
这是一个单元格:
// Configure cell
var cell = new StackLayout
{
WidthRequest = Device.Idiom == TargetIdiom.Phone ? 60 : 140,
HeightRequest = Device.Idiom == TargetIdiom.Phone ? 60 : 50,
BackgroundColor = Color.FromRgb(60, 56, 72),
Children = {
new Label {
Text = Device.Idiom == TargetIdiom.Phone ? book.Contains("1") || book.Contains("2") || book.Contains("3") ? book.Substring(0,4).Replace(" ", "") : book.Substring(0,2) : book,
FontSize = 18,
TextColor = Color.White,
LineBreakMode = LineBreakMode.TailTruncation,
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalTextAlignment = TextAlignment.Center,
HorizontalTextAlignment = TextAlignment.Center
}
}
};
layout.Children.Add(cell);
任何有助于实现这一目标的帮助表示赞赏。
答案 0 :(得分:1)
你所指的WrapLayout是一个自定义布局,它是由我相信的开发人员创建的其中一个演示。要具有拖放功能,您必须自己手动实现它。
我个人会将事件处理程序附加到单元格的Tapped事件:
var cell = new StackLayout
{
Tapped += Cell_Tapped;
WidthRequest = Device.Idiom == TargetIdiom.Phone ? 60 : 140,
HeightRequest = Device.Idiom == TargetIdiom.Phone ? 60 : 50,
BackgroundColor = Color.FromRgb(60, 56, 72),
Children = {
new Label {
Text = Device.Idiom == TargetIdiom.Phone ? book.Contains("1") || book.Contains("2") || book.Contains("3") ? book.Substring(0,4).Replace(" ", "") : book.Substring(0,2) : book,
FontSize = 18,
TextColor = Color.White,
LineBreakMode = LineBreakMode.TailTruncation,
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalTextAlignment = TextAlignment.Center,
HorizontalTextAlignment = TextAlignment.Center
}
}
};
layout.Children.Add(cell);
然后创建一个事件处理程序:
void Cell_Tapped(object sender, EventArgs e)
{
// Stuff you want to do with that cell
// Make the current selected cell invisible, attach it to a boxview that is being moved by the tap event
}
但这只适用于点按而不是真正的拖放实现,而Xamarin.Forms目前不允许您访问触摸事件。您可以为iOS和Android上的单元格编写自定义渲染器,以允许您在两个平台上访问TouchesBegan和TouchesEnded类型的事件。
此Xamarin link提供了有关在iOS和Android上集成触控的演练。
我希望这会有所帮助,我相信这有不同的实现方式。