多次按下按钮加载多个页面(Android)

问题描述

我想解决这个问题，当我多次按下按钮时 - 提供了许多相同的页面.我在这里找到了这样的代码.

I want to solve the problem, when I push the button several times - offers many of the same pages. I found here such code.

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 - 不起作用.但我无法得到姓名.

Navigation.NavigationStack - works fine.
Navigation.ModalStack - doesnt work. But I cant get Name.

推荐答案

关于这个常见问题有各种线程，我可以在论坛上看到你已经评论过它，也有 NavigationExtensions班级:

there are various threads on this common issue, I can see on the forums that you already commented on it, there are also NavigationExtensions class:

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);
        }
    }
}

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

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