iOS持久化Cookies与清空（可以用来保存登陆状态和退出登陆）

//本地拿到存储的cookies

NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"cookiesInfo" ofType:@"plist"];NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];NSArray *cookies = [data objectForKey:@"cookiesKey"];NSURL *url = [NSURL URLWithString:HomeBseUrl];if (cookies) {    if (isClearCookies) {        //清除cookies        NSHTTPCookie *cookie;        NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];        for (cookie in [storage cookies])        {            [storage deleteCookie:cookie];        }        //缓存web清除        [[NSURLCache sharedURLCache] removeAllCachedResponses];        NSURLCache * cache = [NSURLCache sharedURLCache];        [cache removeAllCachedResponses];        [cache setDiskCapacity:0];        [cache setMemoryCapacity:0];        if (url) {//清除所有cookie            NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:url];            for (int i = 0; i < [cookies count]; i++) {                NSHTTPCookie *cookie = (NSHTTPCookie *)[cookies objectAtIndex:i];                [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];            }        }    }else{       //设置cookies         NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];        [cookieProperties setObject:[cookies objectAtIndex:0] forKey:NSHTTPCookieName];        [cookieProperties setObject:[cookies objectAtIndex:1] forKey:NSHTTPCookieValue];        [cookieProperties setObject:[cookies objectAtIndex:3] forKey:NSHTTPCookieDomain];        [cookieProperties setObject:[cookies objectAtIndex:4] forKey:NSHTTPCookiePath];        NSHTTPCookie *cookieuser = [NSHTTPCookie cookieWithProperties:cookieProperties];        [[NSHTTPCookieStorage sharedHTTPCookieStorage]  setCookie:cookieuser];     } }

//设置完后再加载webView loadingrequest

//获取cookies 并持久化

NSHTTPCookie *cookie;NSHTTPCookieStorage *nCookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];NSArray *cookiesURL = [nCookies cookiesForURL:[NSURL URLWithString:HomeBseUrl]];for (id c in cookiesURL){    if ([c isKindOfClass:[NSHTTPCookie class]])    {        cookie=(NSHTTPCookie *)c;        if ([cookie.name isEqualToString:@"PHPSESSID"]) {            NSNumber *sessionOnly = [NSNumber numberWithBool:cookie.sessionOnly];            NSNumber *isSecure = [NSNumber numberWithBool:cookie.isSecure];            NSArray *cookies = [NSArray arrayWithObjects:cookie.name, cookie.value, sessionOnly,          cookie.domain, cookie.path, isSecure, nil];            NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"cookiesInfo" ofType:@"plist"];            NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];            [data setObject:cookies forKey:@"cookiesKey"];            NSLog(@"________%@", data);//直接打印数据。            [data writeToFile:plistPath atomically:YES];             break;        }    }}

//如果存取不成功，可以新建一个名为cookiesInfo的plist文件

用的话自己调整一下存cookies 的地方 我目前在viewWilldisappear 和 应用程序退出时存的