AFNetworking处理同步请求

AFNetworking2.0

 NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:1];
 AFHTTPRequestOperation *operstion = [[AFHTTPRequestOperation alloc] initWithRequest:urlRequest]; 
 [operstion start]; 
 [operstion waitUntilFinished];
return operstion.responseData;

AFNetworking3.0

NSString *urlString =@"";
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
dispatch_semaphore_t disp = dispatch_semaphore_create(0);
NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { 
       //处理model
       dispatch_semaphore_signal(disp); 
 }];
[dataTask resume];
dispatch_semaphore_wait(disp, DISPATCH_TIME_FOREVER);