开发过程中会遇见某些情况在https的请求下网页或者网页内的https图片无法正常显示
解决办法
1.在plist文件内将Allow Arbitrary Loads in Web Content 置为 YES
若有设置NSAllowsArbitraryLoads 为 YES,可不用设置上面

NSAllowsArbitraryLoads
2.加入wkWebView的代理方法
//加载不受信任的https
- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * _Nullable credential))completionHandler{
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
NSURLCredential *card = [[NSURLCredential alloc]initWithTrust:challenge.protectionSpace.serverTrust];
completionHandler(NSURLSessionAuthChallengeUseCredential,card);
}
}