cookie

参考：
ios htttp网络请求cookie的读取与写入

NSHTTPCookieStorage(获取和删除cookie)

iOS中Cookie介绍

---

1、在请求（post、get、上传）中设置在本地中存储的cookie

manager.requestSerializer.HTTPShouldHandleCookies = YES;
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
[manager.requestSerializer setValue:[ud objectForKey:@"dictCookies"] forHTTPHeaderField: @"Cookie"];

2、网络回调response中拿到是否超时state状态

3、在登录接口response中来获取cookie存到本地

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
NSDictionary *dictCookies = [NSHTTPCookie requestHeaderFieldsWithCookies:[cookieJar cookies]];
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
[ud setObject:dictCookies[@"Cookie"] forKey:@"dictCookies"];

4、登录超时、登出时删除cookie

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
for (NSHTTPCookie *cookie in [cookieJar cookies])
{
[[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"baseId"];
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"loginId"];
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"dictCookies"];

5.webview设置cookie

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:_urlString]];
//设置Cookies
[request setValue:[[NSUserDefaults standardUserDefaults] objectForKey:@"dictCookies"] forHTTPHeaderField: @"Cookie"];
[_webview loadRequest:request];

6.webview获取登陆超时状态

NSString *responseString = [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.innerText"];
NSData *data= [responseString dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
id jsonObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];

7. 需要重新登录

if ([[jsonObject objectForKey:@"state"] isEqualToString:@"1103"]) {//后台规定1103，就是超时了，下面进行超时处理

[_webview addSubview:[self accImageView]];

[WebViewController relogin];

}

设置不能多台设备同时登录：可以每次登录，后台更新cookie。