Question

我想从我的应用上传文件到我的服务器。当应用处于活动状态时，以下代码效果很好。如果我按主页按钮或打开另一个应用程序上传停止。

我已启动后台提取功能，但仍无效。

Afnetworking有后台支持，但我无法弄清楚我是如何在我的代码中实现此功能的。

NSString *str=[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Archive.zip"];
NSDictionary *parameters = @{@"foo": @"bar"};
     NSURL *filePath = [NSURL fileURLWithPath:str];
    AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];

    NSData *imageData=[NSData dataWithContentsOfURL:filePath];


    NSMutableURLRequest *request =
    [serializer multipartFormRequestWithMethod:@"POST" URLString:@"http://url"
                                    parameters:parameters
                     constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
                         [formData appendPartWithFileData:imageData
                                                     name:@"image"
                                                 fileName:@"Archive.zip"
                                                 mimeType:@"application/zip"];
                     }];


    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    AFHTTPRequestOperation *operation =
    [manager HTTPRequestOperationWithRequest:request
                                     success:^(AFHTTPRequestOperation *operation, id responseObject) {
                                         NSLog(@"Success %@", responseObject);
                                     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                         NSLog(@"Failure %@", error.description);
                                     }];


    [operation setUploadProgressBlock:^(NSUInteger __unused bytesWritten,
                                        long long totalBytesWritten,
                                        long long totalBytesExpectedToWrite) {
        NSLog(@"Wrote %lld/%lld", totalBytesWritten, totalBytesExpectedToWrite);
    }];


    [operation start];

Answer 1

更改此行

[operation start];

到这个

[operation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{
        // Handle iOS shutting you down (possibly make a note of where you
        // stopped so you can resume later)
    }];


    [manager.operationQueue addOperation:operation];

您可以查看这些链接 AFHTTPRequestOperation doesn't work after stand by mode 和Alternative for enqueueHTTPRequestOperation in AFNetworking 2.0

AFNetworking后台文件上传

1 个答案: