SLRequest进度回调( iOS 6)

Question

我正在使用iOS6的新社交API实现一个Facebook视频上传，一切都很好，除了我没有找到一种方法来知道上传的进展情况……Apple似乎提供的唯一API是，如果上传完成或失败，他们可能是如此-他们没有提供一种方法来了解它？

我也没有发现任何关于这个话题的问题，我不可能是唯一对这个话题感兴趣的人，如果有人知道任何其他事情，请让我们知道。

谢谢！

Answer 1

使用preparedURLRequest获取NSURLRequest对象。通过使用NSURLConnection手动发送请求，您可以提供一个可以处理委托方法的委托，比如connection:didSendBodyData:totalBytesWritten:totalBytesExpectedToWrite:。

Answer 2

我一直在努力解决这个问题，并最终让它工作起来。我想我应该分享我的代码片段：

-(void)sendTwitter {
ACAccountStore *account = [[ACAccountStore alloc] init];
ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:
                              ACAccountTypeIdentifierTwitter];

[account requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error) {
    if (granted == YES) {
        NSArray *arrayOfAccounts = [account accountsWithAccountType:accountType];
        if ([arrayOfAccounts count] > 0) {
            twitterAccount = [arrayOfAccounts lastObject];

            NSString *status = @"Secrets";
            UIImageView *uploadImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 640, 480)];
            UIImage *uploadImage = [image resizedImageToFitInSize:uploadImageView.bounds.size scaleIfSmaller:NO];

            NSURL *requestURL = [NSURL URLWithString:@"https://upload.twitter.com/1.1/statuses/update_with_media.json"];

            SLRequest *postRequest = [SLRequest
                                      requestForServiceType:SLServiceTypeTwitter
                                      requestMethod:SLRequestMethodPOST
                                      URL:requestURL parameters:nil];
            [postRequest addMultipartData:UIImageJPEGRepresentation(uploadImage, 0.6) withName:@"media[]" type:@"multipart/form-data" filename:nil];
            [postRequest addMultipartData:[status dataUsingEncoding:NSUTF8StringEncoding] withName:@"status" type:@"multipart/form-data" filename:nil];
            [postRequest setAccount:twitterAccount];

            NSURLRequest *preparedRequest = [postRequest preparedURLRequest];

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

            [operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
                NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
            }];
            [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
                    NSLog(@"Twitter upload success");
                    [self completedSendingPhotos];
                } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                    NSLog(@"Twitter upload error");
                }];

            [operation start];
        }
    }
}];

}

Answer 3

对于那些对这里感兴趣的人来说，我是如何使用AFNetworking的，在拥有一个SLRequest对象之后，我使用@Jesper的方式来获得一个进度监听器。

NSURLRequest* preparedRequest = [uploadRequest preparedURLRequest];

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:preparedRequest];
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
    NSLog(@"%lld bytes out of %d sent.", totalBytesWritten, fileSize);
    float progress = totalBytesWritten/(float)fileSize;
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Facebook upload success");
    });
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Facebook upload error");
    });
}];

[operation start];

希望这能有所帮助！