导航到页面会增加内存使用率Windows Universal 8.1

本文介绍了导航到页面会增加内存使用率Windows Universal 8.1的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在创建Windows Universal 8.1应用程序.每次我导航到一个页面，然后又导航回该页面，然后再次导航到该页面时，该页面的新实例将保存在内存中.显然，垃圾收集器会在一段时间后释放内存，但是如果不需要，我宁愿不使用该内存.有没有办法回收或处理这些页面?

I'm creating a Windows Universal 8.1 application. Everytime I navigate to a page and then navigate back and then to the page again a new instance of the page is being held in memory. Obviously the garbage collector frees the memory after a while, however I'd rather not use the memory if it's unneeded. Is there a way to recycle or dispose of these pages?

推荐答案

在Windows Uriversal App中，我们可以使用 NavigationCacheMode 来recycle页面.可以在页面的构造函数中设置它.例如，有一个我们要回收的MainPage:

In Windows Uriversal App, We can use NavigationCacheMode to recycle a page. It can be set in the constructor of the page. For example, there is a MainPage we want to recycle:

public MainPage()
{
    this.InitializeComponent();

    // Set the NavigationCacheMode of Page to Enabled. 
    // The page is cached, but the cached instance is discarded when the size 
    //     of the cache for the frame is exceeded.
    this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;

    // OR Set the NavigationCacheMode of Page to Required. 
    // The page is cached and the cached instance is reused for every visit 
    //     regardless of the cache size for the frame.
    // this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Required;
}

设置后，我们无需重新创建即可返回MainPage.

After setting it, We can go back to MainPage without re-create it.

如果NavigationCacheMode设置为已禁用.页面的内存从其 OnNavigatedFrom 时将被释放.

If NavigationCacheMode is set to Disabled. The memory of page will be released when OnNavigatedFrom from it.

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