ios – 后台会话不支持从NSData上传任务

2019年12月25日作者：佚名

我正在尝试使用Share扩展上传图像,但问题是当我添加后台任务时它给了我这个错误,它说后台任务不支持nsdata但是wwdc会话正在nsdata中上传图像.你能告诉我问题在哪里吗？以及我如何解决它

后台会话不支持从NSData上载任务

NSString *boundary = @"SportuondoFormBoundary";

NSString * configurationName = @"com.xxxxxxxx.PhotoSharing.backgroundConfiguration";

NSURLSessionConfiguration *configuration= [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:configurationName];
[configuration setSharedContainerIdentifier:kGroupNameToShareData];


configuration.HTTPAdditionalHeaders = @{
                                        @"api-key"       : @"55e76dc4bbae25b066cb",@"Accept"        : @"application/json",@"Content-Type"  : [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]
                                        };

NSURLSession *session=[NSURLSession  sessionWithConfiguration:configuration delegate:self delegateQueue:nil];


NSMutableData *body = [NSMutableData data];


for (NSString *key in parameters)
{
    [body appendData:[[NSString stringWithFormat:@"--%@rn",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="%@"rnrn",key] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@rn",[parameters objectForKey:key]] dataUsingEncoding:NSUTF8StringEncoding]];

}

NSData *imageData = UIImageJPEGRepresentation(image,0.8);
NSLog(@"imageDATE,%@",imageData);
if (imageData)
{
    [body appendData:[[NSString stringWithFormat:@"--%@rn",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="%@"; filename="image.jpg"rn",@"file"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: image/jpgrnrn" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:imageData];
    [body appendData:[[NSString stringWithFormat:@"rn"] dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[[NSString stringWithFormat:@"--%@--rn",boundary] dataUsingEncoding:NSUTF8StringEncoding]];




// Data uploading task. We could use NSURLSessionUploadTask instead of NSURLSessionDataTask if we needed to support uploads in the background
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",kURLBase,kURLAddPostDL]];
NSLog(@"url %@",url);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10000];
request.HTTPMethod = @"POST";
request.HTTPBody = body;



NSURLSessionUploadTask *upload=[session uploadTaskWithRequest:request fromData:request.HTTPBody];
[upload resume];

解决方法

看来Up NSURLSessionUploadTask不支持大尺寸NSData,
但是你可以给NSURLSessionUploadTask一个文件路径上传到服务器上,或者把你的图像暂时写在磁盘上然后给出路径.

这是一个上传文件路径和NSdata的例子.

Uploads using backgroundSessionConfiguration and NSURLSessionUploadTask cause app to crash

更新：

//Create a file to upload
UIImage *image = [UIImage imageNamed:@"onboarding-4@2x.png"];
NSData *imageData = UIImagePNGRepresentation(image);
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *URLs = [fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask];
NSString *documentsDirectory = [[URLs objectAtIndex:0] absoluteString];

//这是filePath URL

NSString *filePath = [documentsDirectory stringByAppendingString:@"testfile.png"];
[imageData writeToFile:filePath atomically:YES];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"https://file.upload/destination"]];
[request setHTTPMethod:@"PUT"];

//这里使用的是filePath.

NSURLSessionUploadTask *uploadTask = [upLoadSession uploadTaskWithRequest:request fromFile:[NSURL URLWithString:filePath] completionHandler:^(NSData *data,NSURLResponse *response,NSError *error) {
    //code
}];

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