按按钮多次加载多个页面(Android)

Question

我想解决问题时，我想解决该问题。几次按下按钮 - 提供许多相同的页面。我在这里找到了这样的代码。

var stack = Navigation.NavigationStack;
if (stack[stack.Count - 1].GetType() != typeof(DetailsPage))
await Navigation.PushAsync (new DetailsPage ());

Navigation.NavigationStack-工作正常。
Navigation.ModalStack- don t work. But I can t获取名称。

Answer 1

在这个常见问题上有各种线程，我可以在您已经对其进行评论的论坛上看到，也有NavigationExtensions类：

public static class NavigationExtensions
{
    public static async Task PushModalAsyncSingle(this INavigation nav, Page page, bool animated = false)
    {
        if (App.Navigation.ModalStack.Count == 0 || 
            App.Navigation.ModalStack.Last().GetType() != page.GetType())
        {
            await nav.PushModalAsync(page, animated);
        }
    }
    public static async Task PushAsyncSingle(this INavigation nav, Page page, bool animated = false)
    {
        if (App.Navigation.NavigationStack.Count == 0 ||
            App.Navigation.NavigationStack.Last().GetType() != page.GetType())
        {
            await nav.PushAsync(page, animated);
        }
    }
}

这是讨论：https://forums.xamarin.com/discussion/29787/double-tapping-in-tapping-in-xamarin-forms-on-android