使用 AFNetworking 2.0 加载图像答案

【问题标题】：Loading an Image with AFNetworking 2.0使用 AFNetworking 2.0 加载图像
【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..

标签： ios objective-c afnetworking-2

【解决方案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。

【解决方案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（：

【讨论】：