Twitter Auth Example

TwitterAuth.m

#import <AFNetworking/AFNetworking.h>

 - (void) requestToken {
    
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:configuration];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    
    NSData *plainData = [[NSString stringWithFormat:@"%@:%@", @"YOUR_TOKEN", @"YOUR_SECRET"] dataUsingEncoding:NSUTF8StringEncoding];
    NSString *encodedUsernameAndPassword = [plainData base64EncodedStringWithOptions:0];
    NSString *authHeader = [NSString stringWithFormat:@"Basic %@", encodedUsernameAndPassword];
    [manager.requestSerializer setValue:authHeader forHTTPHeaderField:@"Authorization"];
    
    NSString *URL = @"https://api.twitter.com/oauth2/token?grant_type=client_credentials";
    [manager POST:URL parameters:nil progress:nil
          success:^(NSURLSessionDataTask *operation, id responseObject) {
              
          }
          failure:^(NSURLSessionDataTask *operation, NSError *error) {
              
          }];
    
}