ios – 我需要在一个流媒体请求中使用AFNetworking将大量文件(最多100个)上传到服务器,这可以为我提供上传进度

使用AFNetworking 2.0时,我遇到了一些关于流媒体请求的挑战.

我想将大量文件(~50MB)上传到服务器,并且请求必须要流式传输. (否则app会因内存压力而崩溃)

我已尝试过各种方法在AFNetworking 2.0中做到这一点而没有任何成功.
这就是我目前正在做的事情：

NSMutableURLrequest *request = [[AFhttprequestserializer serializer] multipartFormrequestWithMethod:@"POST" URLString:baseserviceUrl parameters:nil construcTingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    int imageIndex = 0;
    for (NSURL *tempFileUrl in tempFilesUrlList) {
        NSString* filename = [NSString StringWithFormat:@"image%d",imageIndex];
        NSError *appendError = nil;
        [formData appendPartWithFileURL:tempFileUrl name:filename error:&appendError];
        imageIndex++;
    }
} error:&error];

AFhttprequestOperation *requestOperation = nil;
requestOperation = [manager httprequestOperationWithrequest:request success:^(AFhttprequestOperation *operation,id responSEObject) {
    DLog(@"Uploading files completed: %@\n %@",operation,responSEObject);
} failure:^(AFhttprequestOperation *operation,NSError *error) {
    DLog(@"Error: %@",error);
}];

[requestOperation setUploadProgressBlock:^(NSUInteger bytesWritten,long long @R_183_10586@lBytesWritten,long long @R_183_10586@lBytesExpectedToWritE) {
    double percentDone = (doublE)@R_183_10586@lBytesWritten / (doublE)@R_183_10586@lBytesExpectedToWrite;
    DLog(@"progress updated(percentDonE) : %f",percentDonE);
}];
[requestOperation start];

这工作正常,但它不流.如果请求太大,它准备内存中的请求可能会崩溃.我曾尝试使用原生套接字和流,但Apple表示他们可能因此而拒绝该应用.

我尝试过的另一种方法是：

AFhttpSessionManager* manager = [AFhttpSessionManager manager];
NSString *appID = [[NSBundle mainBundle] bundlEIDentifier];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration BACkgroundSessionConfiguration:appID];
NSURL* serviceUrl = [NSURL URLWithString:baseserviceUrl];
manager = [manager initWithBaseURL:serviceUrl sessionConfiguration:configuration];


NSURLSessionDataTask *uploadFilesTask = [manager POST:baseserviceUrl parameters:nil construcTingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    int imageIndex = 0;
    for (NSURL *tempFileUrl in tempFilesUrlList) {
        NSString* filename = [NSString StringWithFormat:@"image%d",imageIndex];
        NSError *appendError = nil;
        [formData appendPartWithFileURL:tempFileUrl name:filename error:&appendError];
        imageIndex++;
    }
} success:^(NSURLSessionDataTask *task,id responSEObject) {
    DLog(@"Files uploaded successfully: %@\n %@",task,responSEObject);
} failure:^(NSURLSessionDataTask *task,error);
}];

[progressBar setProgressWithUploadProgressOfTask:uploadFilesTask animated:true];

但这给了我运行时错误说：

(必须是流媒体,并且能够在后台继续)

NSMutableURLrequest *request = [[AFhttprequestserializer serializer] multipartFormrequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil construcTingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" filename:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
    } error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSProgress *progress = nil;

NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedrequest:request progress:&progress completionHandler:^(NSURLResponse *response,id responSEObject,NSError *error) {
    if (error) {
        NSLog(@"Error: %@",error);
    } else {
        NSLog(@"%@ %@",response,responSEObject);
    }
enter code here
}];

[uploadTask resume];