AFNetworking 2.0 使用总结

iOS应用开发，存在网络请求是在所不免的，而AFNetworking是一个很不错的选择。如下是本人对AFNetworking请求的一些总结，希望能帮到你们！

1.JSON Post请求

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NSString *strName = @ "user1" ; NSString *strPsw = @ "pwd1" ;   AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; manager.requestSerializer = [AFJSONRequestSerializer serializer]; NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:strName, @ "user" , strPsw, @ "password" , nil]; NSString *strURL = [GT123_ServerHost stringByAppendingString:GT123_LogonServlet]; [manager POST:strURL parameters:parameters        success:^(AFHTTPRequestOperation *operation, id responseObject)   {       if (responseObject != nil)       {           NSDictionary *dicRes = responseObject;           NSString *strState = [dicRes objectForKey:@ "state" ];           if (strState && [strState isEqualToString:@ "success" ])           {               NSString *strSession = [dicRes objectForKey:@ "session" ];                              NSLog(@ "%@" , strSession);           }  else {           }       }  else {       }   } failure:^(AFHTTPRequestOperation *operation, NSError *error)   {   }];

上段代码是用户登陆请求，用到了AFHTTPRequestOperationManager的POST请求。请求参数放到NSDictionary里（NSMutableDictionary也可），strURL是请求服务地址，success和failure后面写请求回调内容。返回内容responseObject实际上是一个NSDictionary对象，解析比较容易。

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2.JSON Get请求

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long long lTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;   AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; NSString *strURL = [NSString stringWithFormat:@ "%@%@?max=20&et=%lld" ,GT123_ServerHost,GT123_GetNewsListBeforeServlet, lTimestamp]; [manager GET:strURL parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {      if (responseObject != nil)      {          NSDictionary *dicRes = responseObject;          NSString *strState = [dicRes objectForKey:@ "state" ];          if (strState && [strState isEqualToString:@ "success" ])          {              NSArray *lNews = [dicRes objectForKey:@ "post_list" ];              if (lNews && lNews.count > 0)              {                  NSLog(@ "news count - %lu" , (unsigned  long )lNews.count);              }          }  else {          }      }  else      {      } } failure:^(AFHTTPRequestOperation *operation, NSError *error) { }];

上段代码是获取新闻列表的具体实现，用到了AFHTTPRequestOperationManager的GET请求。因此请求参数放到strURL里。请求返回内容responseObject也是一个NSDictionary对象。

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3.图片上传

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- ( void )uploadImg:(UIImage *)img withName:(NSString *)imgName {            NSData *imageData = UIImageJPEGRepresentation(img, 1.0);            NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];      [parameters setObject:imgName forKey:@ "name" ];      [parameters setObject:@ "jpg" forKey:@ "type" ];            AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];      manager.requestSerializer = [AFJSONRequestSerializer serializer];      NSString *strURL = [GT123_ServerHost stringByAppendingString:GT123_UploadPostPictureServlet];      [manager POST:strURL parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData)       {           if (imageData)           {               [formData appendPartWithFileData:imageData name:imgName fileName:imgName mimeType:@ "image/jpeg" ];           }       } success:^(AFHTTPRequestOperation *operation, id responseObject) {                      if (responseObject)           {               NSDictionary *dicRes = responseObject;               NSString *strState = [dicRes objectForKey:@ "state" ];               if (strState && [strState isEqualToString:@ "success" ])               {                   NSLog(@ "upload success!" );               }  else {               }           }  else {           }                  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {       }]; }

以上代码经过post方法将图片上传到服务器。与上述所讲json post请求不一样，这里须要填充constructingBodyWithBlock内容，也就是图片数据和参数。图片数据是NSData类型，须要将UIImage转成NSData。若是须要传其余参数的话，放到parameters里，同图片数据一块儿上传服务器。

 

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1	[formData appendPartWithFileData:imageData name:imgName fileName:imgName mimeType:@ "image/jpeg" ];

上一行代码里name和fileName参数能够随意给个值，不要太纠结。

返回内容仍是一个NSDictionary对象。

 

 

AFNetworking请求方面，本人的总结暂时有这些，后续再补上...