如何取消AFdownloadrequest操作并且不保留以前的进度(删除临时文件)iOS

我正在从服务器下载文件.
我能够成功下载文件.
但每当我取消下载请求(中间)操作并重新开始下载.
下载从先前的进度开始(而不是从零开始).
但我想从零开始重新下载.

设置operation.deleteTempFileOnCancel = YES;也没有帮助

当我取消之间的下载时,在给定的目标路径上没有创建文件

operation.tempPath is returning null (not able to delete temporary file)

我使用以下代码

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:model.downloadUrl]];
     operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:path shouldResume:YES];
     operation.deleteTempFileOnCancel = YES;


            // download operation progressive block
            [operation setProgressiveDownloadProgressBlock:^(AFDownloadRequestOperation *operation,NSInteger bytesRead,long long totalBytesRead,long long totalBytesExpected,long long totalBytesReadForFile,long long totalBytesExpectedToReadForFile)
             {
                 // calculate current download progress

                 }
             }];

            // download operation completion block
            [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject)
             {


             } 

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

                 // operation Failed


             }];

           [operation start];

如果在中间取消下载然后再次启动,我想从零开始下载.我使用的是iOS 7

解决方法

好吧,我刚刚找到了解决方法.我会在这里发布,以防其他人有同样的问题.

在此行之后,您可以检查是否实际创建了tempPath

operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:path shouldResume:YES];
NSLog("%@",operation.tempPath);

然后将该路径添加到字典中

Nsstring *tempPath = _operation.tempPath;
[self.tempPathDict setobject:tempPath forKey:your_key];

当您停止操作时,您可以调用此代码

Nsstring *tempPath = [self.tempPathDict objectForKey:your_key];
// Cancel the operation you want
[operation cancel];
// Remove the tempFile 
NSError *error = [[NSError alloc] init];
[[NSFileManager defaultManager] removeItemAtPath:tempPath error:&error];
// And last remove the path from the dictionary
[self.tempPathDict removeObjectForKey:your_key];