Can not download files using mobile network but on wifi connection everything is working good-CodePudding

I am using wifi connection with my app I can download files but when I change the connection to mobile network app is working but not downloading files.

-(NSURLSession *)defaultSession {
if (_defaultSession == nil) {
    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
    config.allowsCellularAccess = NO;
    _defaultSession = [NSURLSession sessionWithConfiguration: config delegate: self delegateQueue: [NSOperationQueue mainQueue]];
}
return _defaultSession;

CodePudding user response：

Change the following line

config.allowsCellularAccess = NO;

config.allowsCellularAccess = YES;

CodePudding user response：

[1][I am still confusing why I am not able to download and see files on my mobile network but it works when I change to Wifi connection. Any help appreciate it!][2]

[and here is the my error message code session] [2]: https://i.stack.imgur.com/DoJ0m.png