how to remove html5 local storage of an iOS app using UIWebview

Question

I have an app that uses UIWebview which is used to browser different sites/urls. I am in need of an option \"clear client data\" similar to iOS mobile safari \"Remove All we

Answer 1

Note, that, if you’re using PhoneGap, you’ll also have to clear their internal backup of the localstorage cache:

//Remove the localstorage db
NSString *path = [[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"Backups"] stringByAppendingPathComponent:@"localstorage.appdata.db"];
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];

//Also remove the cached versions
path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
for (NSString *string in [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil]) {
    if ([[string pathExtension] isEqualToString:@"localstorage"]) {
        [[NSFileManager defaultManager] removeItemAtPath:path error:nil];
    }
}

Answer 2

You should be able to do it cleaning the content of the Caches directory of your app:

EDIT: Update code as suggested by @RaphaelSchweikert because of wrong error management.

// first, remove the cookies. 
NSHTTPCookie *cookie;
NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
for (cookie in [storage cookies]) {
    [storage deleteCookie:cookie];
}

NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
NSArray *array = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];
for (NSString *string in array) {
    NSLog(@"Removing %@", [path stringByAppendingPathComponent:string]);
if ([[string pathExtension] isEqualToString:@"localstorage"])
    [[NSFileManager defaultManager] removeItemAtPath:[path stringByAppendingPathComponent:string] error:nil];
}

Inside that folder on my simulator I see many .localstorage files ;-) Try and let me know