https／tcp ssh／tls

// https 处理
+ (AFSecurityPolicy*)customSecurityPolicy {
    // 证书
    NSString *cerPath = [[NSBundle mainBundle] pathForResource:@"server" ofType:@"cer"];//证书的路径
    NSData *certData = [NSData dataWithContentsOfFile:cerPath];
    // AFSSLPinningModeCertificate 使用证书验证模式
    AFSecurityPolicy *securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone];
    
    // 如果是需要验证自建证书，需要设置为YES
    securityPolicy.allowInvalidCertificates = NO;
    
    //validatesDomainName 是否需要验证域名，默认为YES；
    //如置为NO，建议自己添加对应域名的校验逻辑。
    securityPolicy.validatesDomainName = NO;
    securityPolicy.pinnedCertificates = [NSSet setWithObjects:certData, nil];
    return securityPolicy;
}

- (void)socket:(GCDAsyncSocket *)sock didReceiveTrust:(SecTrustRef)trust completionHandler:(void (^)(BOOL shouldTrustPeer))completionHandler {
    completionHandler(YES);
    return;
}