多次按下按钮会加载多个页面(Android) [英] Pressing buttons multiple times loads multiple pages (Android)

问题描述

当我几次按下按钮时，我想解决该问题-提供许多相同的页面.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-正常工作.
Navigation.ModalStack-无法获取名称.

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

推荐答案

在这个常见问题上有各种各样的话题，我可以在论坛上看到您已经对此发表过评论的话题，还有NavigationExtensions类:

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);
        }
    }
}

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

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