OnNavigatedFrom之后，页面不会自行销毁/卸载 [英] Page doesn't destroy/unload itself after OnNavigatedFrom

问题描述

我正在使用框架显示我的当前页面.用户可以在两个页面之间切换.

I am using a frame to show my current page. The user can switch between two pages.

我通过以下网址导航到页面:

I navigate to the pages via:

frame.Navigate(typeof(FirstPage));

和

frame.Navigate(typeof(SecondPage));

我认为每次切换页面时，旧页面都会被存储/卸载所有内容.

I thought that every time I switch between the pages the old page will be destoyed/unload all it's content.

但是从内存使用情况来看，它看起来并不像这样:

But looking on the memory usage, it doesn't look like it:

(每次导航到SecondPage时，我都会运行垃圾收集器，以便您可以看到何时进行导航)

(every time I navigate to the SecondPage I run the garbage collector so you can see when a navigation occured)

我必须更改frame.Navigation()方法还是必须在OnNavigationFrom()方法中添加一些内容?

Do I have to change the frame.Navigation() method or do I have to add something to the OnNavigationFrom() method?

推荐答案

如果您不希望应用程序导航后占用更多内存，只需设置

If you don't want the app to cosume much memory after navigation, just set the NavigationCacheMode property on your pages to NavigationCacheMode.Required.

您的应用不会在每次导航到页面时都为其创建新实例.

Your app will not be creating new instances of the pages everytime you navigate to them.

这篇关于OnNavigatedFrom之后，页面不会自行销毁/卸载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！