WKWebView携带不上cookie的问题处理

自从WKWebView推出后Apple官方及众多开发者都推荐使用它代替UIWebView，确实通过加载速度、占用内存方面的对比都要好上几个档次，索性就把项目中的浏览器控件换成了WKWebView，一开始进行的挺顺利的，正当我窃窃自喜时却遭到了当头一棒，正是被众多开发者诟病的WKWebView的cookie缓存问题，在这里咱不分析为何cookie带不上，也不分析如何解决问题，只介绍通过各种渠道找到的众多ioser解决方法中能解决问题的一种方法，废话不多说了直接上代码

1.取出cookie缓存到cookie容器中

-(void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {

    NSHTTPURLResponse *response = (NSHTTPURLResponse *)navigationResponse.response;
    NSArray *cookies =[NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:response.URL];
    for (NSHTTPCookie *cookie in cookies) {
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
    }

    decisionHandler(WKNavigationResponsePolicyAllow); // 必须实现 加载
}

-(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {

    //取出cookie
    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    //js函数
    NSString *JSFuncString =
    @"function setCookie(name,value,expires)\
    {\
    var oDate=new Date();\
    oDate.setDate(oDate.getDate()+expires);\
    document.cookie=name+'='+value+';expires='+oDate+';path=/'\
    }\
    function getCookie(name)\
    {\
    var arr = document.cookie.match(new RegExp('(^| )'+name+'=({FNXX==XXFN}*)(;|$)'));\
    if(arr != null) return unescape(arr[2]); return null;\
    }\
    function delCookie(name)\
    {\
    var exp = new Date();\
    exp.setTime(exp.getTime() - 1);\
    var cval=getCookie(name);\
    if(cval!=null) document.cookie= name + '='+cval+';expires='+exp.toGMTString();\
    }";

    //拼凑js字符串
    NSMutableString *JSCookieString = JSFuncString.mutableCopy;
    for (NSHTTPCookie *cookie in cookieStorage.cookies) {
        NSString *excuteJSString = [NSString stringWithFormat:@"setCookie('%@', '%@', 1);", cookie.name, cookie.value];
        [JSCookieString appendString:excuteJSString];
    }
    //执行js
    [webView evaluateJavaScript:JSCookieString completionHandler:^(id obj, NSError * _Nullable error) {
        DebugLog(@"%@",error);
    }];

}

好了到此为止是可以解决同域名下的cookie携带问题，至于跨域目前没有涉及到，后续接着研究

by：初光夫