AFNetworking2.5使用

    + (void)netWorkStatus  
    {  
        /** 
         AFNetworkReachabilityStatusUnknown          = -1,  // 未知 
         AFNetworkReachabilityStatusNotReachable     = 0,   // 无连接 
         AFNetworkReachabilityStatusReachableViaWWAN = 1,   // 3G 花钱 
         AFNetworkReachabilityStatusReachableViaWiFi = 2,   // WiFi 
         */  
        // 如果要检测网络状态的变化,必须用检测管理器的单例的startMonitoring  
        [[AFNetworkReachabilityManager sharedManager] startMonitoring];  
          
        // 检测网络连接的单例,网络变化时的回调方法  
        [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {  
            NSLog(@"%ld", status);  
        }];  
    }  

    + (void)JSONDataWithUrl:(NSString *)url success:(void (^)(id json))success fail:(void (^)())fail;  
    {  
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];  
          
        NSDictionary *dict = @{@"format": @"json"};  
        // 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情  
        [manager GET:url parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {  
            if (success) {  
                success(responseObject);  
            }  
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
            NSLog(@"%@", error);  
            if (fail) {  
                fail();  
            }  
        }];  
    }  

    + (void)XMLDataWithUrl:(NSString *)urlStr success:(void (^)(id xml))success fail:(void (^)())fail  
    {  
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];  
          
        // 返回的数据格式是XML  
        manager.responseSerializer = [AFXMLParserResponseSerializer serializer];  
          
        NSDictionary *dict = @{@"format": @"xml"};  
          
        // 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情  
        [manager GET:urlStr parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {  
            if (success) {  
                success(responseObject);  
            }  
              
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
            NSLog(@"%@", error);  
            if (fail) {  
                fail();  
            }  
        }];  
    }  

    + (void)postJSONWithUrl:(NSString *)urlStr parameters:(id)parameters success:(void (^)(id responseObject))success fail:(void (^)())fail  
    {  
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];  
        // 设置请求格式  
        manager.requestSerializer = [AFJSONRequestSerializer serializer];  
        // 设置返回格式  
        manager.responseSerializer = [AFHTTPResponseSerializer serializer];  
        [manager POST:urlStr parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {  
    //        NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];  
            if (success) {  
                success(responseObject);  
            }  
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
            NSLog(@"%@", error);  
            if (fail) {  
                fail();  
            }  
        }];  
          
    }  

    + (void)sessionDownloadWithUrl:(NSString *)urlStr success:(void (^)(NSURL *fileURL))success fail:(void (^)())fail  
    {  
        NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];  
        AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:config];  
      
        NSString *urlString = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  
          
        NSURL *url = [NSURL URLWithString:urlString];  
        NSURLRequest *request = [NSURLRequest requestWithURL:url];  
          
        NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {  
            // 指定下载文件保存的路径  
            //        NSLog(@"%@ %@", targetPath, response.suggestedFilename);  
            // 将下载文件保存在缓存路径中  
            NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];  
            NSString *path = [cacheDir stringByAppendingPathComponent:response.suggestedFilename];  
              
            // URLWithString返回的是网络的URL,如果使用本地URL,需要注意  
    //        NSURL *fileURL1 = [NSURL URLWithString:path];  
            NSURL *fileURL = [NSURL fileURLWithPath:path];  
              
    //        NSLog(@"== %@ |||| %@", fileURL1, fileURL);  
            if (success) {  
                success(fileURL);  
            }  
              
            return fileURL;  
        } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {  
            NSLog(@"%@ %@", filePath, error);  
            if (fail) {  
                fail();  
            }  
        }];  
          
        [task resume];  
    }  

+ (void)postUploadWithUrl:(NSString *)urlStr fileUrl:(NSURL *)fileURL fileName:(NSString *)fileName fileType:(NSString *)fileTye success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    // 本地上传给服务器时,没有确定的URL,不好用MD5的方式处理
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    //@"http://localhost/demo/upload.php"
    [manager POST:urlStr parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
//        NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"头像1.png" withExtension:nil];
        
        // 要上传保存在服务器中的名称
        // 使用时间来作为文件名 2014-04-30 14:20:57.png
        // 让不同的用户信息,保存在不同目录中
//        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
//        // 设置日期格式
//        formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
//        NSString *fileName = [formatter stringFromDate:[NSDate date]];
        
        //@"image/png"
        [formData appendPartWithFileURL:fileURL name:@"uploadFile" fileName:fileName mimeType:fileTye error:NULL];
        
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (fail) {
            fail();
        }
    }];
}

+ (void)postUploadWithUrl:(NSString *)urlStr fileUrl:(NSURL *)fileURL success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    // AFHTTPResponseSerializer就是正常的HTTP请求响应结果:NSData
    // 当请求的返回数据不是JSON,XML,PList,UIImage之外,使用AFHTTPResponseSerializer
    // 例如返回一个html,text...
    //
    // 实际上就是AFN没有对响应数据做任何处理的情况
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    
    // formData是遵守了AFMultipartFormData的对象
    [manager POST:urlStr parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
        // 将本地的文件上传至服务器
//        NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"头像1.png" withExtension:nil];
        
        [formData appendPartWithFileURL:fileURL name:@"uploadFile" error:NULL];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
//        NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
//        
//        NSLog(@"完成 %@", result);
        if (success) {
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"错误 %@", error.localizedDescription);
        if (fail) {
            fail();
        }
    }];
}