关于delegate代理应用场景的套路

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    if (_delegate && [_delegate respondsToSelector:@selector(conversationListViewController:didSelectConversationModel:)]) {
        EaseConversationModel *model = [self.dataArray objectAtIndex:indexPath.row];
        [_delegate conversationListViewController:self didSelectConversationModel:model];
    } else {
        EaseConversationModel *model = [self.dataArray objectAtIndex:indexPath.row];
        EaseMessageViewController *viewController = [[EaseMessageViewController alloc] initWithConversationChatter:model.conversation.conversationId conversationType:model.conversation.type];
        viewController.title = model.title;
        [self.navigationController pushViewController:viewController animated:YES];
    }
}

@interface ConversationListController : EaseConversationListViewController
 self.delegate = self;

环信这里，父类的代理子类来实现，直接self.delegate = self;