ios webview 加载链接携带cookie

ios 中有的请求需要带cookie,  验证登陆等. 

 ios默认是会把url 的cookie保存到本地, 但不是实时保存的, 会有延迟, 一般理解为在系统空闲时去保存 .  所以为了实时给url添加cookie, 我们最好将请求url 后获取到的cookie 保存到本地, 用NSUserDefault即可

在设置Cookie之前，先让我们了解一下通用Cookie格式，多个Cookie的格式通常为：cookie1=value1; cookie2=value2; cookie3=value3;

这里特别要注意，多个cookie之间用分号+空格分隔开，不是&也不是单纯的空格。我所了解到的iOS设置Cookie的方法有两种，分别如下。

方法一：

NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",YourURL]]];

NSMutableString *cookieString = [[NSMutableString alloc]init];

[cookieString appendFormat:@"userid=%@;",@"xxxx"];

[cookieString appendFormat:@"sessionid=%@;",@"xxxx"];

[cookieString appendFormat:@"nickname=%@;",@"xxxx"];

[req setValue:cookieString forHTTPHeaderField:@"Cookie"];

方法二：

NSDictionary *properties1 = [NSDictionary dictionaryWithObjectsAndKeys:

@"domain.com", NSHTTPCookieDomain,

@"/", NSHTTPCookiePath,

@"userid", NSHTTPCookieName,

@"tangtang", NSHTTPCookieValue, nil];

NSDictionary *properties2 = [NSDictionary dictionaryWithObjectsAndKeys:

@"domain.com", NSHTTPCookieDomain,

@"/", NSHTTPCookiePath,

@"pid", NSHTTPCookieName,

@"xiaotang", NSHTTPCookieValue,

nil];

NSHTTPCookie *cookie1 = [NSHTTPCookie cookieWithProperties:properties1];

NSHTTPCookie *cookie2 = [NSHTTPCookie cookieWithProperties:properties2];

NSArray* cookies = [NSArray arrayWithObjects:cookie1, cookie2, nil];

NSDictionary * headers = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];

request.allHTTPHeaderFields = headers; //这句才是关键

注意: 一定要把cookie设置到request.allHTTPHeaderFields中才会生效.

网上好多的demo都是这样设置cookie的 ---   [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];         亲测不能用

update  于当天下午

现在是这样, 要在每一次请求的时候都要带cookie, 如果要按上面那种写法之有在第一次请求的时候带cookie, 其他请求都带不上了,  

解决方法 :

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

{

NSString *urlString = [[request URL] absoluteString];

NSLog(@"urlString = %@",urlString);

NSMutableURLRequest *mutableRequest = [request mutableCopy];

NSDictionary *requestHeaders = request.allHTTPHeaderFields;

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];

// 判断请求头是否已包含，如果不判断该字段会导致webview加载时死循环

if (!requestHeaders[@"Cookie"]) {

NSString *ticket = [userDefaults objectForKey:MMH_USER_DEFAULT_USER_TICKET];

NSMutableString *cookieString = [[NSMutableString alloc]init];

[cookieString appendFormat:@"ESHOP_H5_T=%@;",ticket];

[mutableRequest setValue:cookieString forHTTPHeaderField:@"Cookie"];

NSLog(@"ticket  ==  %@", ticket);

request = [mutableRequest copy];

[webView loadRequest:request];

return NO;

}else{

return YES:

}