如果是使用[[session dataTaskWithRequest:request] resume];这种调用方式监听不到代理回调

[LZAscott]

NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];

[[session dataTaskWithRequest:request] resume];