Intercepting Back Button in Xamarin Forms WPF

Question

I tried to intercept the back navigation button by subscribing to the Navigating event in the WPF project of a Xamarin Forms solution:

System.Windows.Application.Current.Navigating += new NavigatingCancelEventHandler(OnNavigating);

But OnNavigating is never called.

Is this the correct way to do it or is there a better one?

Answer 1

我的经验是在iOS / Android上使用Xamarin.Forms，但是这里有：

ContentPage具有OnBackButtonPressed（）事件。这是我们的用法：

    protected override bool OnBackButtonPressed()
    {
        if (GrdDisplayName.IsVisible)         //If grid is visible then hide it but don't exit
        {
            GrdDisplayName.IsVisible = false;
            return true;
        }
        return base.OnBackButtonPressed();     //Allow exit
    }