如何在 iOS 中使用 SSL 验证

Question

我正在尝试使用可信证书，并想看看以下代码是否有效。我不拥有此代码的任何所有权，但只是想了解如何调用此委托。我已将连接设置为自我委托，但它从未调用此方法。

- (BOOL)connection:(NSURLConnection *)connection
canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *) space {
if([[space authenticationMethod] 
isEqualToString:NSURLAuthenticationMethodServerTrust]) {
// Note: this is presently only called once per server (or URL?) until
//       you restart the app
if(shouldAllowSelfSignedCert) {
return YES; // Self-signed cert will be accepted
} else {
return NO;  // Self-signed cert will be rejected
}
// Note: it doesn't seem to matter what you return for a proper SSL cert
//       only self-signed certs
}
// If no other authentication is required, return NO for everything else
// Otherwise maybe YES for NSURLAuthenticationMethodDefault and etc.
return NO;
}

如果有人能指出我正确的方向，我将非常感激。

谢谢。