Xamarin Forms Delete Web Cache / Javascript Storage - xamarin.forms

Question

I have an app that is using an http server to serve files to a Web View. The web viewers are caching image links which is causing broken images when their paths changes.
I can delete the web store on Android and UWP but I cannot figure out how to properly with iOS.
Android:
Android.Webkit.WebStorage.Instance.DeleteAllData();
UWP:
Windows.UI.Xaml.Controls.WebView.ClearTemporaryWebDataAsync();
I have tried the following with no luck:
NSHttpCookieStorage.SharedStorage.RemoveCookiesSinceDate(NSDate.DistantPast);
WKWebsiteDataStore.DefaultDataStore.FetchDataRecordsOfTypes(WKWebsiteDataStore.AllWebsiteDataTypes, (NSArray records) =>
{
for (nuint i = 0; i < records.Count; i++)
{
var record = records.GetItem<WKWebsiteDataRecord>(i);
WKWebsiteDataStore.DefaultDataStore.RemoveDataOfTypes(
websiteDataTypes: record.DataTypes,
date: new[] { record },
completionHandler: ()=> { });
}
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}"); });
}
});
NSUrlCache.SharedCache.RemoveAllCachedResponses();
NSUrlCache.SharedCache.DiskCapacity = 0;
NSUrlCache.SharedCache.MemoryCapacity = 0;

Answer 1

Found the answer at: https://gochannel.org/links/link/snapshot/640
Rewrote to Xamarin IOS
private void DeleteCachedFiles()
{
if (UIDevice.CurrentDevice.CheckSystemVersion(9, 0))
{
NSHttpCookieStorage.SharedStorage.RemoveCookiesSinceDate(NSDate.DistantPast);
WKWebsiteDataStore.DefaultDataStore.FetchDataRecordsOfTypes(WKWebsiteDataStore.AllWebsiteDataTypes, (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}"); });
}
});
NSUrlCache.SharedCache.RemoveAllCachedResponses();
}
else
{
// Remove the basic cache.
NSUrlCache.SharedCache.RemoveAllCachedResponses();
var cookies = NSHttpCookieStorage.SharedStorage.Cookies;
foreach (var c in cookies)
{
NSHttpCookieStorage.SharedStorage.DeleteCookie(c);
}
}
try
{
// Clear web cache
DeleteLibraryFolderContents("Caches");
// Remove all cookies stored by the site. This includes localStorage, sessionStorage, and WebSQL/IndexedDB.
DeleteLibraryFolderContents("Cookies");
// Removes all app cache storage.
DeleteLibraryFolder("WebKit");
}
catch (Exception ex)
{
App.UnhandledException(ex, $"Error deleting cache {ex.Message}");
}
}
private void DeleteLibraryFolder(string folderName)
{
var manager = NSFileManager.DefaultManager;
var library = manager.GetUrls(NSSearchPathDirectory.LibraryDirectory, NSSearchPathDomain.User).First();
var dir = Path.Combine(library.Path, folderName);
manager.Remove(dir, out NSError error);
if (error != null)
{
App.UnhandledException(new Exception(error.Description), error.Description);
}
}
private void DeleteLibraryFolderContents(string folderName)
{
var manager = NSFileManager.DefaultManager;
var library = manager.GetUrls(NSSearchPathDirectory.LibraryDirectory, NSSearchPathDomain.User).First();
var dir = Path.Combine(library.Path, folderName);
var contents = manager.GetDirectoryContent(dir, out NSError error);
if (error != null)
{
App.UnhandledException(new Exception(error.Description), error.Description);
}
foreach (var c in contents)
{
try
{
manager.Remove(Path.Combine(dir, c), out NSError errorRemove);
if (errorRemove != null)
{
App.UnhandledException(new Exception(error.Description), error.Description);
}
}
catch (Exception ex)
{
App.UnhandledException(ex, $"Error deleting folder contents: {folderName}{Environment.NewLine}{ex.Message}");
}
}
}