I tried the following way:
[[NSURLCache sharedURLCache] removeAllCachedResponses];
[[NSURLCache sharedURLCache] setDiskCapacity:0];
[[NSURLCache sharedURLCache] setMemoryCapacity:0];
It clears the cache.db but it is still in memory.
It does not delete it permanently.
I am able to read it through "strings"
Does anybody know how to purge cache.db in iOS(pragmatically)
Try this,
NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil];
[NSURLCache setSharedURLCache:sharedCache];
Related
The cache mechanism of AFNetworking is not working for me, I have an image of 500ko with big dimension and I want to cache it. But every time I close the application and open it again I have to wait for 20sec for the image to load so the cache system is not working here is the code:
I tried :
[imageView setImageWithURL:[NSURL URLWithString:imageURL]
placeholderImage:[UIImage imageNamed:#"placeholder"]];
and then tried :
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:imageURL]
cachePolicy:NSURLRequestReturnCacheDataElseLoad
timeoutInterval:60];
[imageView setImageWithURLRequest:imageRequest
placeholderImage:[UIImage imageNamed:#"placeholder"]
success:nil
failure:nil];
NSURLCache does not write to disk in its default so we need to declare a shared NSURLCache in app delegate :
NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:2 * 1024 * 1024
diskCapacity:100 * 1024 * 1024
diskPath:nil];
[NSURLCache setSharedURLCache:sharedCache];
Reference
I have walked through various solution to clear the local image cache in UIWebView, while i trying to load the image in html it atomically displays the previous image(i using the same name to replace the image in template).
[[NSURLCache sharedURLCache] removeAllCachedResponses];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:[NSURL fileURLWithPath:[[CustomFunctions getFilesPath] stringByAppendingPathComponent:obj]] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:30.0];
[webview1 loadRequest:request];
[webview1 reload];
this is my code and can any one please suggest me to do this. Thanks in advance. sorry for my English.
//to prevent internal caching of webpages in application
NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil];
[NSURLCache setSharedURLCache:sharedCache];
//[sharedCache release];
sharedCache = nil;
try using this. It will clear the url cache memory of your application.
Try this ...
[[NSURLCache sharedURLCache] removeCachedResponseForRequest:NSURLRequest];
This would remove a cached response for a specific request. There is also a call that will remove all cached responses for all requests ran on the UIWebView:
[[NSURLCache sharedURLCache] removeAllCachedResponses];
i have an app that loads pdf file from server in UIWebView
when i change the pdf file from the server it does't changes in the app, i tried all this methods
[[NSURLCache sharedURLCache] removeCachedResponseForRequest:request];
[[NSURLCache sharedURLCache] removeAllCachedResponses];
for(NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
if([[cookie domain] isEqualToString:MyURLString]) {
[[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}
}
still the new pdf file doesn't change , sometimes it take some time to change and sometimes it don't
is there any other methods ?
it's weird that neither [[NSURLCache sharedURLCache] removeAllCachedResponses]; nor [[NSURLCache sharedURLCache] removeAllCachedResponses]; works for you.
you may try one more (although not nice) trick:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
if(request.cachePolicy != NSURLRequestReloadIgnoringLocalCacheData) {
NSURLRequst* noCacheRequest = [[NSURLRequest alloc] initWithURL:request.URL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:request.timeoutInterval];
[webView loadRequest:noCacheRequest];
return false;
}
else
return true;
}
also, try setHTTPShouldHandleCookies:, like here
I can't seem to find a way to clear UIWebView cache. I have tried the following, but nothin worked so far:
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyNever];
[[NSURLCache sharedURLCache] removeCachedResponseForRequest:_request];
[[NSURLCache sharedURLCache] removeAllCachedResponses];
_request = nil;
[NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil];
[NSURLCache setSharedURLCache:sharedCache];
_request = [NSMutableURLRequest requestWithURL:t_url
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
// also tried NSURLRequestReloadIgnoringLocalAndRemoteCacheData and NSURLRequestReloadIgnoringCacheData
timeoutInterval:10.0];
[_request setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData];
[_request setHTTPShouldHandleCookies:NO];
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
willCacheResponse:(NSCachedURLResponse *)cachedResponse {
return nil; // Actually never gets called
}
Anybody came across this? Thanks!
You seem to have tried almost everything. I'm aware you are rejecting the cookies. Yet, Why dont you try this? This worked for me...
NSHTTPCookie *aCookie;
for (aCookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
[[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:aCookie];
}
I'm developing an application that uses the xml parsing. Everything works wing perfection but when I edit the xml file changes are not displayed. I think it may be a matter of cache because the file is loaded correctly on the server. how do I fix it?
-(IBAction)avviaParsing{
NSString *urlstring=#"http://www.acicastelloonline.it/app_ios/show.xml";
NSURL *xmlURL=[NSURL URLWithString:urlstring];
NSXMLParser *parser = [[ NSXMLParser alloc] initWithContentsOfURL:xmlURL];
[parser setDelegate:self];
[parser parse];
[parser release];}
here is three option, you should try this code before XMLParsing:
you select only one of the three.
clearing
[[NSURLCache sharedURLCache] removeAllCachedResponses];
disable cache
NSURLCache *cache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil];
[NSURLCache setSharedURLCache:cache];
[sharedCache release];
this is other solution.
NSURL *xmlURL=[NSURL URLWithString:URL];
NSURLRequest *request = [NSURLRequest requestWithURL:xmlURL cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:0.0f];
NSXMLParser *xmlParser =[[NSXMLParser alloc] initWithData:[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];