Xamarin iOS 从 WKWebView 清除缓存

Question

我正在执行以下操作以清除 WkWebView 中的缓存。我想知道如何确认缓存被清除

 var request = new NSUrlRequest (webURL, NSUrlRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData, 0);

 NSUrlCache.SharedCache.RemoveAllCachedResponses ();
 NSUrlCache.SharedCache.MemoryCapacity = 0;
 NSUrlCache.SharedCache.DiskCapacity = 0;

有没有办法在发出请求时打印缓存

Answer 1

从这个 question 看来，您为 iOS 9 执行了此操作（c# 版本），它会打印出删除了哪些记录：

var websiteDataTypes = new NSSet<NSString>(new []
{
    //Choose which ones you want to remove
    WKWebsiteDataType.Cookies,
    WKWebsiteDataType.DiskCache,
    WKWebsiteDataType.IndexedDBDatabases,
    WKWebsiteDataType.LocalStorage,
    WKWebsiteDataType.MemoryCache,
    WKWebsiteDataType.OfflineWebApplicationCache,
    WKWebsiteDataType.SessionStorage,
    WKWebsiteDataType.WebSQLDatabases
});

WKWebsiteDataStore.DefaultDataStore.FetchDataRecordsOfTypes (websiteDataTypes, (NSArray records) =>
{
    for (nuint i = 0; i < records.Count; i++) {
        var record = records.GetItem<WKWebsiteDataRecord> (i);

        WKWebsiteDataStore.DefaultDataStore.RemoveDataOfTypes (record.DataTypes, 
            new[] {record}, () => {Console.Write($"deleted: {record.DisplayName}");});
    }
});

或者对于 iOS 8，从 ShingoFukuyama/WKWebViewTips 您可以检查 Library 目录中的子目录 Cookies、Caches、WebKit 是否已删除。

iOS 8

After much trial and error, I've reached the following conclusion:

Use NSURLCache and NSHTTPCookie to delete cookies and caches in the same way as you used to do on UIWebView.

If you use WKProccessPool, re-initialize it.

Delete Cookies, Caches, WebKit subdirectories in the Library directory.

Delete all WKWebViews

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