使用AFNetworking上传多个文件 - UIViewController不会释放

Question

我必须上传多个文件，跟踪其进度&订阅完成&故障块才能在操作结束时显示相关消息。

我写了我自己的AFHTTPClient包装器并创建了下面的方法。

- (void) uploadFiles:(NSArray*)files 
       path:(NSString*)path 
      parameters:(NSDictionary*)parameters 
     progressBlock:(void (^)(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite))block 
      success:(void (^)(AFHTTPRequestOperation *, id))success failure:(void (^)(AFHTTPRequestOperation *, NSError *))failure 
{ 
    NSMutableURLRequest *request = 
    [self multipartFormRequestWithMethod:@"POST" 
            path:path 
           parameters:parameters 
       constructingBodyWithBlock: 
    ^(id <AFMultipartFormData>formData) { 

     for (CRLMultiPartFile *file in files) { 
      NSAssert(file.name, @"Name cannot be nil"); 
      NSAssert(file.file, @"Nothing found to upload"); 
      NSAssert(file.filename, @"FileName cannot be nil"); 
      NSAssert(file.mimeType, @"Must set Mime-Type for %@", file.filename); 
      [formData appendPartWithFileData:file.file name:file.name fileName:file.filename mimeType:file.typeString]; 
     } 
    }]; 

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; 
    [operation setUploadProgressBlock:block]; 
    [operation setCompletionBlockWithSuccess:success failure:failure]; 
    [self enqueueHTTPRequestOperation:operation]; 
} 

调用此方法没有得到解除分配，并且因此所有包含的图像被保留在存储器中，以及因此导致内存泄漏和最终存储器警告视图控制器。

做的分析表明，在整个操作结束时，视图控制器具有refCount 1.

当我调用注释掉，在上传文件时，一切工作正常。

这是控制器中的代码。它使用进度模块更新用户界面上的元素。

NSMutableDictionary *params = [[NSMutableDictionary alloc] init]; 
ContactModel *model = (ContactModel*)[self.contacts lastObject]; 
[params setObject:model.phone forKey:@"receiver"]; 

__block typeof(self) sSelf = self; 

[[JMClient sharedClient] uploadFiles:files 
           path:@"picture_share/" 
          parameters:params 
         progressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) { 

          CGFloat progPercent = ceilf(((CGFloat)totalBytesWritten/(CGFloat)totalBytesExpectedToWrite) * 100); 

          CGFloat widthToCut = (progPercent * sSelf.progWidth)/100; 

          CGRect frame = sSelf.progresViewBG.frame; 
          frame.size.width = (sSelf.progWidth - widthToCut); 
          frame.origin.x = (sSelf.progOrigin + widthToCut); 
          sSelf.progresViewBG.frame = frame; 

          sSelf.progLabel.text = [NSString stringWithFormat:@"%i%%", (int)progPercent]; 

          frame = sSelf.progTipView.frame; 
          frame.origin.x = (sSelf.progresViewBG.frame.origin.x - frame.size.width/2); 
          sSelf.progTipView.frame = frame; 

          frame = sSelf.progLabel.frame; 
          frame.origin.x = (sSelf.progresViewBG.frame.origin.x - frame.size.width/2); 
          sSelf.progLabel.frame = frame; 

         } success:^(AFHTTPRequestOperation *success, id reponse) { 

          CGRect frame = sSelf.progresViewBG.frame; 
          frame.size.width = 0; 
          frame.origin.x = sSelf.progOrigin; 
          sSelf.progresViewBG.frame = frame; 
          [sSelf.cancelButton setImage:[UIImage imageNamed:@"trnsfr_prgss_complt.png"] forState:UIControlStateNormal]; 

          [sSelf performSelector:@selector(hideAwayProgressBars) withObject:nil afterDelay:3]; 

         } failure:^(AFHTTPRequestOperation *failure, NSError *error) { 

          [Mediator showMessage:TGLocalizedString(kMessageKeyForUploadingFailed)]; 
          [sSelf performSelector:@selector(hideAwayProgressBars) withObject:nil afterDelay:3]; 

         }]; 

self.operation = [[self.client.sharedClient.operationQueue operations] lastObject]; 

- (void) hideAwayProgressBars 
{ 
    [[NSNotificationCenter defaultCenter] postNotificationName:kNotifcationKeyForPhotoUploadComplete object:nil]; 
} 

通知由父控制器接收，它从超级视图中删除此控制器的视图，并将其设置为零。

P.S. CRLMultiPartFile是一个自定义的类来保存，如果你正在使用ARC文件的属性被上传

Answer 1

，你应该使用__weak代替__block，所以你不捕捉self块内。