转自：https://blog.csdn.net/weixin_36259863/article/details/78048396
-(void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
NSLog(@"This will execute successfully!");
if ([[challenge protectionSpace] authenticationMethod] == NSURLAuthenticationMethodServerTrust) {
[[challenge sender] useCredential:[NSURLCredential credentialForTrust:[[challenge protectionSpace] serverTrust]] forAuthenticationChallenge:challenge];
}
}
