使用 AFNetworking 2.0 加载图像

Posted 2023-02-24

【中文标题】使用 AFNetworking 2.0 加载图像

【英文标题】：Loading an Image with AFNetworking 2.0

【发布时间】：2014-02-14 20:43:08

【问题描述】：

我正在尝试使用 AFNetworking 2.0 将照片添加到 POST。 这个 ios 应用程序将帖子和照片发送到博客。 我不知道为什么图片无法加载。

这是我目前得到的：

// publish text and image
-(void)publishTextAndImage:(NSString*)resultDisplay and:(NSString*)subject with:(NSString*)nonce

imageData = UIImageJPEGRepresentation(selectedImage, 0.7); // create a data object from selected image

NSString *myUUID = [[NSUUID UUID] UUIDString]; // create a UUID
NSString *formatString = [NSString stringWithFormat:@"<img src=\"/wp-content/uploads/%@\"/>",myUUID];
NSString *contentString = [formatString stringByAppendingString:resultDisplay];
NSString *moodString = [NSString stringWithFormat:@"%d",self.moodNumber];

NSDictionary *parameters = @@"title":subject,
                             @"content":contentString,
                             @"status":@"publish",
                             @"author":@"wordpress",
                             @"user_password":@"xrayyankee",
                             @"nonce":nonce,
                             @"categories":moodString,
                             @"attachment":@"image/jpeg";

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

[manager POST:@"http://thrills.it/?json=posts/create_post" 
 parameters:parameters 
 constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
 
     if (selectedImage)
     
         [formData appendPartWithFileData:imageData name:@"photo" fileName:myUUID mimeType:@"image/jpeg"];
     

  
 success:^(AFHTTPRequestOperation *operation, id responseObject)
 
     NSLog(@"JSON: %@", responseObject);

 
 failure:^(AFHTTPRequestOperation *operation, NSError *error)
 
     NSLog(@"Error: %@", error);
 ];

非常感谢

【问题讨论】：

您收到错误了吗？

我的项目也有同样的问题..您不需要更改发布图像的简单代码..但您需要更改 web 服务的代码以将图像发布到特定的 wordpress 帖子..

【参考方案1】：

我以这种方式使用 AFNetworking：

AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:@"http://thrills.it/?json=posts"]];
NSURLRequest *request = [client multipartFormRequestWithMethod:@"POST" path:@"create_post" parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData)

     if (selectedImage)
     
         [formData appendPartWithFileData:imageData name:@"photo" fileName:myUUID mimeType:@"image/jpeg"];
     

 ];

AFJSONRequestOperation *operation = [AFJSONRequestOperation    JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) 

    NSLog(@"JSON: %@", responseObject);
 failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) 
    NSLog(@"Error: %@", error);
];

[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) 
    float progressValue = (float)((double)totalBytesWritten/(double)totalBytesExpectedToWrite);
    NSLog(@"%f", progressValue);
];

[self.queue addOperation:operation];

.

@property (nonatomic, strong) NSOperationQueue *queue;

我的客户端是之前创建的，但它是这样创建的。

我希望这会有所帮助。

【讨论】：

谢谢，尼古拉斯。 AFNetworking 2.0 中不再存在 AFHTTPClient。我会降级到 1.0 并试一试，但我们只是设法解决了这个问题。以不同的方式命名参数是一个愚蠢的问题。无论如何，谢谢并为你投票。

【参考方案2】：

我知道了，代码很好，是参数命名有问题，这里是：

// publish text and image
-(void)publishTextAndImage:(NSString*)resultDisplay and:(NSString*)subject with:    (NSString*)nonce

imageData = UIImageJPEGRepresentation(selectedImage, 0.7); // create a data object from     selected image

NSString *myUUID = [[NSUUID UUID] UUIDString]; // create a UUID
NSString *formatString = [NSString stringWithFormat:@"<img src=\"/wp-    content/uploads/%@\"/>",myUUID];
NSString *contentString = [formatString stringByAppendingString:resultDisplay];
NSString *moodString = [NSString stringWithFormat:@"%d",self.moodNumber];

NSDictionary *parameters = @@"title":subject,
                         @"content":contentString,
                         @"status":@"publish",
                         @"author":@"wordpress",
                         @"user_password":@"xrayyankee",
                         @"nonce":nonce,
                         @"categories":moodString;

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

[manager POST:@"http://thrills.it/?json=posts/create_post" 
 parameters:parameters 
 constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
 
 if (selectedImage)
 
     [formData appendPartWithFileData:imageData name:@"attachment" fileName:myUUID     mimeType:@"image/jpeg"];
 

 
success:^(AFHTTPRequestOperation *operation, id responseObject)

 NSLog(@"JSON: %@", responseObject);


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

 NSLog(@"Error: %@", error);
];

所以基本上我从参数字典中删除了“附件”参数，并将附加的 imageData 的名称更改为@“附件”。这是 wordpress json api 非常挑剔的问题（：