AFNetworking iOS ,AFHTTPSessionManager 怎么block块外输出数据？？？？

_dataDictionary = [[NSMutableDictionary alloc]initWithCapacity:0];

  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json; charset=utf-8",@"text/json", @"text/plain", nil];
//    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@/ordershow/frontPage.json?pageNo=1&pageSize",IP_URL]];
    [manager GET:url.absoluteString parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

        NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        _dataDictionary = [[[SBJsonParser alloc] init] objectWithString:str];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"------------ç---------- shi bai -----------------%@",error);
   
    }];
        //输出请求的数据
         NSLog(@"------------%@",_dataDictionary);
         

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为什么不直接把 NSLog(@"------------%@",_dataDictionary) 放到 block 里面？

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看懂了，AFN的异步请求成功调用block，所以你现在的写法取到的是nil。
如果想外面取得block内部的数据，可以写个block把这个成功回调传出来

/*
*void (^)(ResultModel *))block 供数据返回
*data  需要提交给接口的数据
/
+ (void)getBlock:(void (^)(ResultModel *))block andPostData:(NSString*)data{
// AFN代码
// 执行AFN接口解析，并且在AFN回调里执行下面的代码
    if (block) {
        ResultModel *result = [[ResultModel alloc] initWithDict:(NSDictionary*)JSON];
        block(result);//我们使用一个block回调把获取到的数据传递出来。
            }
}