IOS上传图片成功但上传失败

Question

我一直在寻找新AFNetworking 2.0上传图片的示例。但我上传的图片总是失败。所以这是我使用的代码

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    UIImage *imagetes = info[UIImagePickerControllerOriginalImage];
    self.picprofile.image = imagetes;

    NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
    PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:@[refURL] options:nil];
    NSString *filename = [[result firstObject] filename];
    NSLog(@"FileName == %@", filename);

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    NSDictionary *parameters = @{@"do":@"profile",@"what":@"editFoto",@"session":sesion};
    NSString *URLString = BaseURLString;

    NSData *imageData = UIImageJPEGRepresentation(self.picprofile.image, 0.5); // image size ca. 50 KB
    NSLog(@"imageData == %@", imageData);
    [manager.requestSerializer setTimeoutInterval:120];

    manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:@"text/html"];
    [manager POST:URLString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:imageData name:@"foto" fileName:filename mimeType:@"image/jpeg"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Failure %@, %@", error, operation.responseString);
    }];

    [self dismissViewControllerAnimated:NO completion:nil];
}