1、相關介紹

iOS在UIWebView中獲取的cookie的方法：NSHTTPCookieStorage * nCookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];

再具體獲取某個域的cookie：NSArray* cookiesURL = [nCookies cookiesForURL:[NSURL URLWithString:@"你的URL"]];

通過[[NSHTTPCookieStorage sharedHTTPCookieStorage]  setCookie:userCookie]方法將 cookies來保存起來，但是這樣雖然可以保存cookies但是你應用退出之後還是會丟失(其實是cookies過期的問題)，做好的方法是把cookies放到NSUserDefaults保存起來.

2、實現

1.在UIWebView的代理方法中實現獲取cookies並將cookies放到NSUserDefaults保存起來：- (void)webViewDidFinishLoad:(UIWebView*)webView中寫入

- (void)webViewDidFinishLoad:(UIWebView*)webView{
  
  NSArray *nCookies = [[NSHTTPCookieStoragesharedHTTPCookieStorage] cookies];
  for (NSHTTPCookie *cookie in nCookies){
    if ([cookie isKindOfClass:[NSHTTPCookie class]]){
      
      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];
        [[NSUserDefaults standardUserDefaults] setObject:cookies forKey:@"cookies"];
        break;
      }
    }
  }
}

2.獲取cookies：運行之後，UIWebView加載url之前獲取保存好的cookies，並設置cookies，

NSArray *cookies =[[NSUserDefaults standardUserDefaults] objectForKey:@"cookies"];
  if (cookies.count >0) {
    NSMutableDictionary *cookieProperties = [NSMutableDictionarydictionary];
    [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 = [NSHTTPCookiecookieWithProperties:cookieProperties];
    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookieuser];
  }

注意：要在[self.webView loadRequest:req];之前設置獲取cookies！

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