通过AFNetworking 2.0上传iOS图像

我一直在寻找新的AFNetworking 2.0上传图像的例子.
但是我正在撞墙,无法弄清楚代码有什么问题.
所以这是我使用的代码

NSData *imageData = UIImageJPEGRepresentation(image,0.5);
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];


AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://myserverurl.com"];

NSURLrequest *request = [NSURLrequest requestWithURL:URL]; 

NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithrequest:request fromData:imageData progress:nil completionHandler:^(NSURLResponse *response,id responSEObject,NSError *error) {
    if (error) {
        NSLog(@"Error: %@",error);
    } else {
        NSLog(@"success: %@ %@",response,responSEObject);
    }
}];
[uploadTask resume];

TIA@H_197_7@

UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
NSData *imageData = UIImageJPEGRepresentation(image,0.5);
AFhttprequestOperationManager *manager = [AFhttprequestOperationManager manager];
NSDictionary *parameters = @{@"foo": @"bar"};
[manager POST:@"http://example.com/resources.json" parameters:parameters construcTingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFormData:imageData name:@"image"];
} success:^(AFhttprequestOperation *operation,id responSEObject) {
    NSLog(@"success: %@",responSEObject);
} failure:^(AFhttprequestOperation *operation,NSError *error) {
    NSLog(@"Error: %@",error);
}];