上传到实时服务器时CodeIgniter站点问题

I am a beginner in PHP and MVC, I just developed a project in CodeIgniter and it was complete and working superb on my local machine. So I registered a domain and uploaded my site to the live server and the exported the db by sql file, and there are were a ton of problems that I faced, and I am still stuck.I am a beginner in PHP and MVC, I just develope