iOS-AFN Post JSON格式数据

- (void)postrequest{
    afhttpsessionmanager *manager = [afhttpsessionmanager manager];
    // >>>>>>>> post 发送json格式数据的时候加上
    manager.requestserializer = [afjsonrequestserializer serializer];
    manager.responseserializer = [afjsonresponseserializer serializer];
    // <<<<<<<<
    [manager.requestserializer setvalue:@"token_string" forhttpheaderfield:@"authorization"];
    nsstring *url = @"";
    nsdictionary *postdata = @{@"data1":@"one",@"data2":@"two"};
    [manager post:url parameters:postdata progress:^(nsprogress * _nonnull uploadprogress) {
        
    } success:^(nsurlsessiondatatask * _nonnull task, id  _nullable responseobject) {
        
    } failure:^(nsurlsessiondatatask * _nullable task, nserror * _nonnull error) {
       
    }];
}