WKWebView攜帶不上cookie的問題處理

自從WKWebView推出后Apple官方及眾多開發者都推薦使用它代替UIWebView，確實通過加載速度、占用內存方面的對比都要好上幾個檔次，索性就把項目中的瀏覽器控件換成了WKWebView，一開始進行的挺順利的，正當我竊竊自喜時卻遭到了當頭一棒，正是被眾多開發者詬病的WKWebView的cookie緩存問題，在這里咱不分析為何cookie帶不上，也不分析如何解決問題，只介紹通過各種渠道找到的眾多ioser解決方法中能解決問題的一種方法，廢話不多說了直接上代碼

1.取出cookie緩存到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); // 必須實現 加載
}

-(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    
    //取出cookie
    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    //js函數
    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();\
    }";

    //拼湊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];
    }
    //執行js
    [webView evaluateJavaScript:JSCookieString completionHandler:^(id obj, NSError * _Nullable error) {
        DebugLog(@"%@",error);
    }];
    
}

好了到此為止是可以解決同域名下的cookie攜帶問題，至於跨域目前沒有涉及到，后續接着研究

by：初光夫