请求接口支持HTTPS

NSString *cerPath = [[NSBundle mainBundle] pathForResource:@"证书名称" ofType:@"cer"];
    NSData *cerData = [NSData dataWithContentsOfFile:cerPath];
    NSSet *cerSet = [[NSSet alloc]initWithObjects:cerData, nil];
    AFSecurityPolicy *securityPoliy = [AFSecurityPolicy defaultPolicy];
    //allowInvalidCertificates 是否允许无效证书（也就是自建的证书），默认为NO
    //如果是需要验证自建证书，需要设置为YES
    securityPoliy.allowInvalidCertificates = YES;
    //validatesDomainName 是否需要验证域名，默认为YES；
    securityPoliy.validatesDomainName = NO;
    //设置证书
    [securityPoliy setPinnedCertificates:cerSet];
    [dxClient setSecurityPolicy:securityPoliy];

  //如果使用自建证书，需要设置为YES
  securityPoliy.allowInvalidCertificates = YES;