使用 AFNetworking 发送图像和其他参数

Posted 2023-02-23

【中文标题】使用 AFNetworking 发送图像和其他参数

【英文标题】：send image along with other parameters with AFNetworking

【发布时间】：2013-05-22 12:43:10

【问题描述】：

我正在更新使用ASIHTTPRequest 和AFNetworking 的旧应用程序代码。就我而言，我正在向API 发送一组数据，这些数据是不同的类型：图像和其他。

这是我目前采用的代码，实现 API 客户端，请求共享实例，准备 params 字典并将其发送到远程 API：

NSMutableDictionary *params = [NSMutableDictionary dictionary];
[params setValue:@"Some value" forKey:aKey];

[[APIClient sharedInstance]
 postPath:@"/post"
 parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) 
     //some logic


  failure:^(AFHTTPRequestOperation *operation, NSError *error) 
     //handle error

 ];

当我想将图像添加到params 字典时会发生什么情况？

使用ASIHTTPRequest，我曾经做过以下事情：

NSData *imgData = UIImagePNGRepresentation(anImage);

NSString *newStr = [anImageName stringByReplacingOccurrencesOfString:@"/"
                                                              withString:@"_"];



[request addData:imgData
    withFileName:[NSString stringWithFormat:@"%@.png",newStr]
  andContentType:@"image/png"
          forKey:anOtherKey];

我深入研究了AFNetworking 文档，发现他们将图像附加到NSMutableRequest 中，如下所示：

AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"avatar.jpg"], 0.5);
NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) 
    [formData appendPartWithFileData:imageData name:@"avatar" fileName:@"avatar.jpg" mimeType:@"image/jpeg"];
];

我应该如何以一种巧妙的方式将它们混合在一起，以将我的图像数据集成到APIClient 请求中？提前谢谢。

【参考方案1】：

我使用相同的 AFNetworking 上传带有一些参数的图像。这段代码对我来说很好。也许会有所帮助

NSData *imageToUpload = UIImageJPEGRepresentation(uploadedImgView.image, 1.0);//(uploadedImgView.image);
if (imageToUpload)

    NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:keyParameter, @"keyName", nil];

    AFHTTPClient *client= [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:@"http://------"]];

    NSMutableURLRequest *request = [client multipartFormRequestWithMethod:@"POST" path:@"API name as you have" parameters:parameters constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) 
        [formData appendPartWithFileData: imageToUpload name:@"image" fileName:@"temp.jpeg" mimeType:@"image/jpeg"];
    ];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
     
         NSDictionary *jsons = [NSJSONSerialization JSONObjectWithData:responseObject options:kNilOptions error:nil];
         //NSLog(@"response: %@",jsons);

     
                                     failure:^(AFHTTPRequestOperation *operation, NSError *error)
     
         if([operation.response statusCode] == 403)
         
             //NSLog(@"Upload Failed");
             return;
         
         //NSLog(@"error: %@", [operation error]);

     ];

    [operation start];

祝你好运！！

【讨论】：

您好，图片的key 放在哪里？谢谢。

@"image" 是您要上传的任何图像的键。

path参数里具体放什么？

【参考方案2】：

使用 AFNetworking 2.0.1，此代码对我有用。

-(void) saveImage: (NSData *)imageData forImageName: (NSString *) imageName 
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

    NSString *imagePostUrl = [NSString stringWithFormat:@"%@/v1/image", BASE_URL];
    NSDictionary *parameters = @@"imageName": imageName;

    NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:imagePostUrl parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) 
        [formData appendPartWithFileData:imageData name:@"image" fileName:imageName mimeType:@"image/jpeg"];
    ];

    AFHTTPRequestOperation *op = [manager HTTPRequestOperationWithRequest:request success: ^(AFHTTPRequestOperation *operation, id responseObject) 
        DLog(@"response: %@", responseObject);
     failure:^(AFHTTPRequestOperation *operation, NSError *error) 
        DLog(@"Error: %@", error);
    ];
    op.responseSerializer = [AFHTTPResponseSerializer serializer];
    [[NSOperationQueue mainQueue] addOperation:op];

如果需要 JSON 响应，请使用：

op.responseSerializer = [AFJSONResponseSerializer serializer];

而不是

op.responseSerializer = [AFHTTPResponseSerializer serializer];

【讨论】：

AFHTTPClient 被拆分为AFHTTPRequestOperationManager & AFHTTPSessionManager。它在 2.0 中不再存在。