iOS 清理某一个cookies 或者全部 cookies

原贴地址：http://blog.csdn.net/jinglijun/article/details/9048959

清除所有的cookie 方法：

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1. NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];  
2.     if (url) {  
3.         NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:url];  
4.         for (int i = 0; i < [cookies count]; i++) {  
5.             NSHTTPCookie *cookie = (NSHTTPCookie *)[cookies objectAtIndex:i];  
6.             [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];  
7.               
8.         }  

  清除某一个特定的cookie方法：

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1. 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]; } }  

清除某一个url缓存的方法：

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

清除所有缓存方法：        

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1. [[NSURLCache sharedURLCache] removeAllCachedResponses];