首先介绍下AFNetworking中的使用：

2.0要注意个地方：IOS7及其以后，採用AFHTTPSessionManager，IOS7之前採用AFHTTPRequestOperationManager。

以AFHTTPSessionManager为例，代码例如以下：

<span style="font-size:14px;">AFHTTPSessionManager   *httpClient = [AFHTTPSessionManager manager];
    httpClient.requestSerializer = [AFHTTPRequestSerializer serializer];
    httpClient.responseSerializer = [AFHTTPResponseSerializer serializer];
    
    // SSL Pinning
    NSString *certificatePath = [[NSBundle mainBundle] pathForResource:@"certificate" ofType:@"der"];
    NSData *certificateData = [NSData dataWithContentsOfFile:certificatePath];
    
    AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
    [securityPolicy setAllowInvalidCertificates:YES];
    [securityPolicy setPinnedCertificates:@[certificateData]];
    [securityPolicy setSSLPinningMode:AFSSLPinningModeCertificate];
    
    [httpClient setSecurityPolicy:securityPolicy];
    
    [httpClient GET:@"http://xxxx" parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
        
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        //失败信息
    }];</span>

<span style="font-size:14px;">AFHTTPRequestOperationManager *httpClient1 = [AFHTTPRequestOperationManager manager];
    httpClient1.requestSerializer = [AFHTTPRequestSerializer serializer];
    httpClient1.responseSerializer = [AFHTTPResponseSerializer serializer];
    // SSL Pinning
    NSString *certificatePath1 = [[NSBundle mainBundle] pathForResource:@"certificate" ofType:@"der"];
    NSData *certificateData1 = [NSData dataWithContentsOfFile:certificatePath1];
    
    AFSecurityPolicy *securityPolicy1 = [[AFSecurityPolicy alloc] init];
    [securityPolicy1 setAllowInvalidCertificates:YES];
    [securityPolicy1 setPinnedCertificates:@[certificateData1]];
    [securityPolicy1 setSSLPinningMode:AFSSLPinningModeCertificate];
    
    [httpClient setSecurityPolicy:securityPolicy1];
    
    [httpClient1 GET:@"http://xxxx" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        //成功信息
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        //失败信息
    }];</span>

以ASIFormDataRequest为例。代码例如以下：

<span style="font-size:14px;">ASIFormDataRequest * request;
    request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:@""]];
    NSData *cerFile = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"d1" ofType:@"cer"]];
    SecCertificateRef cert = SecCertificateCreateWithData(NULL, (__bridge CFDataRef)cerFile);
    NSArray *array = [NSArray arrayWithObjects:(__bridge id)cert,nil];
    [request setClientCertificates:array];
    [request setValidatesSecureCertificate:NO];
    
    [request startSynchronous];</span>

ASIHTTPRequest的參考http://www.tuicool.com/articles/UN3AveR。代码就不贴了。