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;