AFNetworking Memory

Question

使用AFNetworking從服務器下載文件。這裏的代碼：

self.networkQueue = [[[NSOperationQueue alloc] init] autorelease]; 
[networkQueue setMaxConcurrentOperationCount:3]; 

for(NSDictionary* fileDictionary in self.syncArray) { 
    @autoreleasepool { 

     if([[fileDictionary allKeys] containsObject:@"downloadZipURL"]) { 
      NSString* downloadPath = [fileDictionary objectForKey:@"downloadZipURL"]; 
      downloadPath = [downloadPath stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]; 
      NSURLRequest *requestURL = [NSURLRequest requestWithURL:[NSURL URLWithString:downloadPath]]; 

      NSString* localDestPath = [NSString stringWithFormat:@"%@/%@", [FileUtil userDocumentsDirectory], [downloadPath lastPathComponent]]; 
      NSString* localTempPath = [NSString stringWithFormat:@"%@.tmp", localDestPath]; 
      [(NSMutableDictionary*)fileDictionary setObject:localDestPath forKey:@"downloadDestination"]; 

      AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:requestURL]; 
      operation.outputStream = [NSOutputStream outputStreamToFileAtPath:localDestPath append:NO]; 
      operation.userInfo = fileDictionary; 

      [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { 
       if (networkQueue.operationCount == 0) 
       { 
        if(hasDownloadError || isCancellingSync) { 
         return ; 
        } 

        [self performSelectorInBackground:@selector(processAllFiles) withObject:nil]; 

       } 

      } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
       NSLog(@"Error: %@", error); 
      }]; 

      //   [operation setDownloadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) { 
      //    NSLog(@"Sent %lld of %lld bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, localDestPath); 
      //    float progress = (float)totalBytesWritten/(float)totalBytesExpectedToWrite; 
      //    [(NSMutableDictionary*)operation.userInfo setObject:[NSString stringWithFormat:@"Downloading %.0f%%", progress*100] forKey:@"downloadStatus"]; 
      //    [(NSMutableDictionary*)operation.userInfo setObject:[NSNumber numberWithFloat:progress] forKey:@"downloadProgress"]; 
      //    [syncViewController onPermitUpdated]; 
      //   }]; 

      [networkQueue addOperation:operation]; 
     } 
    } 
} 

我的問題是，一旦這段代碼運行，內存慢慢地被吃掉，永不放棄。現在，這些可以是大文件，這就是我使用outputStream的原因。

任何建議，將不勝感激。

Answer 1

關閉我的頭頂 - 我看到你沒有使用ARC。

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:requestURL]

你是什麼地方發佈這個操作？

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { 
       if (networkQueue.operationCount == 0) 
       { 
        if(hasDownloadError || isCancellingSync) { 
         return ; 
        } 

        [self performSelectorInBackground:@selector(processAllFiles) withObject:nil]; 

       } 

在這裏，您使用的networkQueue在completionBlock和塊保留networkQueue，然後添加在操作中networkQueue，保留了操作，導致他們都沒有重新分配。嘗試製作networkQueue的弱變量並使用它來打破循環。

如果這些不起作用 - 運行儀器並記下哪些對象留在內存中以及何時更改其引用計數。