Xamarin.Forms Navigation.PushAsync不起作用 [英] Xamarin.Forms Navigation.PushAsync Not Working

问题描述

我有一个Xamarin.Forms项目，我有一个自定义控件，在点击该控件时应打开一个新页面.不幸的是，当我呼叫Navigation.PushAsync(...);时，什么也没有发生.我已经阅读了无数StackOverflow问题(这样的)和Xamarin论坛进行了几次Google搜索，但似乎没有一个解决方案可以解决我的问题.

I have a Xamarin.Forms project, and I have a custom control that should open a new page when tapped. Unfortunately, nothing happens when I call Navigation.PushAsync(...);. I've read countless StackOverflow questions (such as this one) and Xamarin Forums threads and done several Google searches, but none of the solutions seem to solve my issue.

• 我的控件继承自ContentView，因为所有Xamarin.Forms视图 做.
• src是一个自定义类，其中包含一些数据点，这些数据点 由此控件和EventDetailsPage使用.
• 我可以确认手势可以正常工作，但是对PushAsync()的调用没有任何作用.
• 我尝试以某种方式操纵该语句，以便使用NavigationPage(这样它就变成myNavigationPage.Navigation.PushAsync(new EventDetailsPage(src));).
• 我还尝试过创建一个构造器，该构造器采用Page并与上述要点类似地使用它.

• My control inherits from ContentView, as all Xamarin.Forms views do.
• src is a custom class that contains some data points that are used by this control and EventDetailsPage.
• I can confirm that the gesture does work itself, but the call to PushAsync() does nothing.
• I have tried manipulating the statement in ways so that a NavigationPage is used (such that it becomes myNavigationPage.Navigation.PushAsync(new EventDetailsPage(src));).
• I have also tried creating a constructor that takes a Page and uses it in away similar to the above point.

我的控件的构造函数:

public EventControl() {
    InitializeComponent();
    GestureRecognizers.Add(new TapGestureRecognizer() {
        Command = new Command(() => Navigation.PushAsync(new EventDetailsPage(src)))
    });
}

通常，在我没有尝试解决其他问题的情况下，在StackOverflow上问一个新问题是我的最后选择.感谢您的帮助.

Typically, asking a new question on StackOverflow is my last resort when nothing else that I've tried solved my problem. Any help is appreciated.

推荐答案

我发现了问题. 基思·罗马(Keith Rome)带领我浏览EventDetailsPage，我评论了一行XAML，就解决了这个问题.该行正在向页面添加自定义控件(与EventControl不相关).我不知道控件的定义或其自定义渲染的定义是否引起了奇怪的行为，但是删除该行解决了此问题.

I found the problem. Keith Rome lead me to look through EventDetailsPage and I commented out a line of XAML, and that solved the problem. That line was adding a custom control to the page (not related to EventControl). I don't know if the control's definition or its custom render's definition was causing the strange behavior, but removing that line solved the issue.

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