WKWebView 支持https请求

- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {

if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {

if ([challenge previousFailureCount] == 0) {

NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];

completionHandler(NSURLSessionAuthChallengeUseCredential, credential);

} else {

completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);

}

} else {

completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);

}

}