How to delete the cache in UIWebview?

Question

I have loaded the url in webview, loading is successful but whenever I hit again its show two url in cache and again its show three url etc. it means it continues to maintain the stack. I am using a lot of method but not working properly.

These are following what i am trying till now.

1.

[[NSURLCache sharedURLCache] removeCachedResponseForRequest:NSURLRequest];


[[NSURLCache sharedURLCache] removeAllCachedResponses];

for(NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {

if([[cookie domain] isEqualToString:someNSStringUrlDomain]) {

    [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}
}

2.

int cacheSizeMemory = 4*1024*1024; // 4MB
int cacheSizeDisk = 32*1024*1024; // 32MB
NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:cacheSizeMemory diskCapacity:cacheSizeDisk diskPath:@"nsurlcache"];
[NSURLCache setSharedURLCache:sharedCache];

3.

 NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil];
[NSURLCache setSharedURLCache:sharedCache];
[sharedCache release];

4.

-(void) viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];

[self.webView removeFromSuperview];
self.webView.delegate = nil;
self.webView = nil;
}

5.

[[NSURLCache sharedURLCache] setDiskCapacity:0];
[[NSURLCache sharedURLCache] setMemoryCapacity:0];

6.

- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.webView stopLoading];
}
- (void) stopLoading {
[self.webView stopLoading];
self.webView.delegate = nil;
NSBundle *mainBundle = [NSBundle mainBundle];
NSURL *homeIndexUrl = [mainBundle URLForResource:@"Home" withExtension:@"html"];
NSURLRequest *urlReq = [NSURLRequest requestWithURL:homeIndexUrl];
[self.webView loadRequest:urlReq];
[EALoaderView hideLoaderForView:self.view animated:YES];
[self.webView loadHTMLString:html baseURL:nil];
 }

I have also try from these following Answer.

1.Clearing UIWebview cache

2.NSURLProtocol isn't asked to load after YES response to canInitWithRequest

3.How To Clear A UIWebView

4.How to delete the cache from UIWebview or dealloc UIWebview

5.How to clear UIWebView cache?

6.UIwebview without Cache

I am doing a lot of R&D but not found the exact solution to resolve these things.

Thanks.

roby · Accepted Answer · 2016-09-26 07:43:11Z

I use the code bellow to delete cache, wish it works for you:

//This must be called in Main Thread
+ (void)clearWebCache
{
 //http://stackoverflow.com/questions/31289838/how-to-delete-wkwebview-cookies
    //https://github.com/ShingoFukuyama/WKWebViewTips
    //http://stackoverflow.com/questions/27105094/how-to-remove-cache-in-wkwebview/32491271#32491271
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"9.0")) {
        NSSet *websiteDataTypes = [NSSet setWithArray:@[WKWebsiteDataTypeDiskCache,
                                                        //WKWebsiteDataTypeOfflineWebApplicationCache,
                                                        WKWebsiteDataTypeMemoryCache,
                                                        //WKWebsiteDataTypeLocalStorage,
                                                        //WKWebsiteDataTypeCookies,
                                                        //WKWebsiteDataTypeSessionStorage,
                                                        //WKWebsiteDataTypeIndexedDBDatabases,
                                                        //WKWebsiteDataTypeWebSQLDatabases
                                                        ]];
        //// All kinds of data
        //            NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
        //// Date from
        NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
        //// Execute
        [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
            // Done
        }];
    }
    else {
        NSHTTPCookie *cookie;
        NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
        for (cookie in [storage cookies]) {
            [storage deleteCookie:cookie];
        }
        [[NSURLCache sharedURLCache] removeAllCachedResponses];
    }
}

user2557885 · Accepted Answer · 2017-09-20 15:40:34Z

-1

Hayia, Fellows! researched this theme for a while and found a solution that works for me the best - use WKWebView it doesn't leak! That's it - so simple.

answered Sep 20, 2017 at 15:40

user2557885

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