Question

我正如here所述使用AFURLConnectionOperation batchOfRequestOperations。我的代码是下面示例代码的修改版本，它可以工作。

NSMutableArray *mutableOperations = [NSMutableArray array];
for (NSURL *fileURL in filesToUpload) {
    NSURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileURL:fileURL name:@"images[]" error:nil];
    }];

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

    [mutableOperations addObject:operation];
}

NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:@[...] progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {
    NSLog(@"%lu of %lu complete", numberOfFinishedOperations, totalNumberOfOperations);
} completionBlock:^(NSArray *operations) {
    NSLog(@"All operations in batch complete");
}];
[[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];

我遇到的问题是，我无法弄清楚如何单独使用AFURLConnectionOperation类，特别是setUploadProgressBlock，其定义如下：

- (void)setUploadProgressBlock:(void (^)(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite))block;

问题是batchOfRequestOperations是静态方法，需要在实例上定义进度块。我无法找到设置AFURLConnectionOperation并将其用作实例的任何示例（除了单请求，我不想要）。即使我可以，我也想重新创建我正在使用的批处理方法的功能。

有没有办法同时使用这个非常方便的块和非常方便的批处理方法？如果没有，我会接受其他建议......

tl; dr：我想批量处理一些上传操作，并使用简单的进度块来跟踪他们的进度。

Answer 1

您可以在batchOfRequestOperations中获取每个操作并使用它们：

[AFURLConnectionOperation batchOfRequestOperations:operations 
 progressBlock:^(NSUInteger numberOfCompletedOperations, NSUInteger totalNumberOfOperations) 
 {
     for(AFHTTPRequestOperation *operation in operations)
     {
         [operation setUploadProgressBlock:^(NSUInteger __unused bytesWritten,
                                        long long totalBytesWritten,
                                        long long totalBytesExpectedToWrite) {
         NSLog(@"PROGRESS: %lld TOTAL: %lld", totalBytesWritten, totalBytesExpectedToWrite);
         //Do whatever you want with the progress
         }];
     }
  }

completionBlock:^(NSArray *operations) {}
];

现在您已经获得了每个请求的进度，您可以轻松地存储和增加全局进度的值。

是否可以同时使用[AFURLConnectionOperation batchOfRequestOperations ...]和setUploadProgressBlock？

1 个答案: