iOS 清理某一個cookies 或者全部 cookies

清除所有的cookie 方法：

NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];  
    if (url) {  
        NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:url];  
        for (int i = 0; i < [cookies count]; i++) {  
            NSHTTPCookie *cookie = (NSHTTPCookie *)[cookies objectAtIndex:i];  
            [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];  
              
        } 

清除某一個特定的cookie方法：

    NSArray * cookArray = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:[NSURL URLWithString:self.loadURL]]; 
    NSString * successCode = @""; for (NSHTTPCookie*cookie in cookArray) { if ([cookie.name isEqualToString:@"cookiename"]) { [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie]; } }  

清除某一個url緩存的方法：

[[NSURLCache sharedURLCache] removeCachedResponseForRequest:[NSURLRequest requestWithURL:url]]; 

清除所有緩存方法：  

[[NSURLCache sharedURLCache] removeAllCachedResponses];