safari 与 app内 cookies共享互通

重点：iOS11以前用SFSafariViewController ， ios11及以后用SFAuthenticationSession

SFSafariViewController可以无感获取，SFAuthenticationSession的弹窗授权暂时没有办法避免

 if (@available(iOS 11.0, *)) {
        SFAuthenticationSession *session = [[SFAuthenticationSession alloc]initWithURL:[NSURL URLWithString:@"https://www.jifenkoudai.com/jifen/index.html#/masterid"] callbackURLScheme:@"xianpaozc" completionHandler:^(NSURL * _Nullable callbackURL, NSError * _Nullable error) {
            NSString *scheme = [callbackURL scheme];
            //web通过 location.href把cookies值通过scheme传过来
        }];
        self.session = session;
        [self.session start];
    } else {
        //SFSafariViewController只能在init时候传入url，不可以跳转
        self.safariView = [[SFSafariViewController alloc] initWithURL:[NSURL URLWithString:@"https://www.jifenkoudai.com/jifen/index.html#/masterid"]];
        self.safariView.delegate = self;
        self.safariView.view.backgroundColor = [UIColor whiteColor];
        //不允许隐藏、透明度不得低于0.05、不允许设置view为CGSizeZero，不能移出屏幕外，但是可以放在某个view的底部
        self.safariView.view.alpha = 0.05;
        self.safariView.view.frame = CGRectMake(0.0, 0.0, 0.5, 0.5);
        [self.view insertSubview:self.safariView.view atIndex:0];
        //必须手动调用addChildViewController和didMoveToParentViewController
        [self addChildViewController:self.safariView];
        [self.safariView didMoveToParentViewController:self];
    }

SFSafariViewController在代理中，移除控制器

//加载完成之后调用
- (void)safariViewController:(SFSafariViewController *)controller didCompleteInitialLoad:(BOOL)didLoadSuccessfully
{
    if(didLoadSuccessfully){
        [self.safariView willMoveToParentViewController:nil];
        [self.safariView.view removeFromSuperview];
        [self.safariView removeFromParentViewController];
    }
}

appdelegate中回调处理scheme

#pragma mark - 处理浏览器的location.href 
-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options{
        //web通过 location.href把cookies值通过scheme传过来
        NSString *scheme = [url scheme];
}