UIWebviewWithCookie
这两天有个项目需求，在网上找了好多博文都不可以拿来就能实现（对于伸手党怎么能行），为了避免浪费大家的时间我在这里给出一份一定可行的方法：
1、相关知识点介绍
1. iOS在`UIWebView`中获取的cookie的方法：`NSHTTPCookieStorage * nCookies = [NSHTTPCookieStorage sharedHTTPCookieStorage]`
2. 再具体获取某个域的饼干：`NSArray* cookiesURL = [nCookies cookiesForURL：[NSURL URLWithString：@“你的URL”]];`
3. 通过`[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie]`方法将 `cookies`来保存起来，但是这样虽然可以保存`cookies`但是你应用退出之后还是会丢失(其实是cookies过期的问题)，做好的方法是把`cookies`放到`NSUserDefaults`保存起来:
2、实现方法
###1. 在UIWebView的代理方法中实现获取cookies并将cookies放到NSUserDefaults保存起来：
(void)webViewDidFinishLoad:(UIWebView *)webView中写入
NSArray *nCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
NSHTTPCookie *cookie;
for (id c in nCookies)
{
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];
[[NSUserDefaults standardUserDefaults] setObject:cookies forKey:@"cookies"];
break;
}
}
}
###2.获取cookies：运行之后，UIWebview加载url之前获取保存好的cookies，并设置cookies完
NSArray *cookies =[[NSUserDefaults standardUserDefaults] objectForKey:@"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];
注意：要在[self.webView loadRequest:req];之前设置获取cookies！ 到现在为止你的应用肯定就已经实现了你想要的功能！ 简书地址
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