一直使用NSURLConnection請求HTTP接口，現在為了安全性的考慮打算使用HTTPS。

那麼怎麼修改呢？

1.不需要證書驗證 ps:我們使用的就是這種

1.1 直接修改HTTP為HTTPS;

1.2 確認有 "Security.framework"

1.3 修改完成，可以直接請求了。

2.需要證書驗證

其他的和1是一樣的，只不過需要加下面方法.

- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
     static CFArrayRef certs;
        if (!certs) {
            NSData*certData =[NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"srca" ofType:@"cer"]];
            SecCertificateRef rootcert =SecCertificateCreateWithData(kCFAllocatorDefault,CFBridgingRetain(certData));
            const void *array[1] = { rootcert };
            certs = CFArrayCreate(NULL, array, 1, &kCFTypeArrayCallBacks);
            CFRelease(rootcert);    // for completeness, really does not matter
        }

        SecTrustRef trust = [[challenge protectionSpace] serverTrust];
        int err;
        SecTrustResultType trustResult = 0;
        err = SecTrustSetAnchorCertificates(trust, certs);
        if (err == noErr) {
            err = SecTrustEvaluate(trust,&trustResult);
        }
        CFRelease(trust);
        BOOL trusted = (err == noErr) && ((trustResult == kSecTrustResultProceed)||(trustResult == kSecTrustResultConfirm) || (trustResult == kSecTrustResultUnspecified));

        if (trusted) {
            [challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
        }else{
            [challenge.sender cancelAuthenticationChallenge:challenge];
        }
}