AFNetworking 使用总结

 1 　　//1.baseURL
 2     NSString *baseURL = @"http://iappfree.candou.com:8080/free/applications";
 3     //2.创建AFHTTPClient
 4     AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:[NSURL  URLWithString:baseURL]];
 5     //3.创建request请求
 6     NSURLRequest *request = [client requestWithMethod:@"GET" path:@"limited?currency=rmb&page=1" parameters:nil];
 7     //4.创建连接
 8     AFJSONRequestOperation *op = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
 9         //请求成功处理
10         //直接反序列化（转成模型对象集合）
11         NSLog(@"%@", JSON);
12     } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
13         //请求失败处理出错处理
14         NSLog(@"错误信息：%@", error);
15     }];
16     //加入队列，进行多线程操作
17     [client.operationQueue addOperation:op];

 1 // AFNetwork根据是否能够连接到baseUrl来判断网络连接状态的
 2     NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
 3     
 4     AFHTTPClient *client = [AFHTTPClient clientWithBaseURL:url];
 5     /*
 6      AFNetworkReachabilityStatusUnknown          = -1,  未知
 7      AFNetworkReachabilityStatusNotReachable     = 0,   未连接
 8      AFNetworkReachabilityStatusReachableViaWWAN = 1,   3G
 9      AFNetworkReachabilityStatusReachableViaWiFi = 2,   WIFI
10      */
11     [client setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
12         switch (status) {
13             case AFNetworkReachabilityStatusUnknown:
14                 NSLog(@"未知错误");
15                 break;
16             case AFNetworkReachabilityStatusReachableViaWiFi:
17                 NSLog(@"WIFI");
18                 break;
19             case AFNetworkReachabilityStatusReachableViaWWAN:
20                 NSLog(@"3G网络");
21                 break;
22             case AFNetworkReachabilityStatusNotReachable:
23                 NSLog(@"未连接");
24                 break;
25         }
26     }];

//1.baseURL
    NSString *baseURL = @"http://musicdata.baidu.com";
    //2.创建AFHTTPClient
    AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:[NSURL  URLWithString:baseURL]];
    
    //3.建立请求
    NSURLRequest *request = [client requestWithMethod:@"GET" path:@"data2/pic/115457125/115457125.jpg" parameters:nil];
    
    //4.操作
    AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    
    //5.设置下载路径(保存在沙盒中)
    
    //获取documents路径的两种方法
#if 0
    //1>用NSSearchPathForDirectoriesInDomains
    NSArray *docs = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documents = [docs[0] stringByAppendingPathComponent:@"Jay.jpg"];
#elif 1
    //2>用
    NSString *documents = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/hehe.jpg"];
#endif
    //指定输出流
    op.outputStream = [NSOutputStream outputStreamToFileAtPath:documents append:YES];
    
    //设置下载完成操作
    [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"下载成功");
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"下载失败");
    }];
    //设置下载进度块代码
    /*
     bytesRead                      当读取的字节数
     totalBytesRead                 已经下载的字节数
     totalBytesExpectedToRead       文件总大小
     */
    [op setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
        CGFloat precent = (float)totalBytesRead / totalBytesExpectedToRead;
        NSLog(@"百分比：%g", precent);
    }];
    //启动下载
    [client.operationQueue addOperation:op];