Inline PDF displayed as raw content instead rendered pdf

I tried to display inline pdf using CI4 but it return raw content of pdf (seem like postscript) instead return rendered content of pdf. it was not happen in CI3. I tried using 'header("Content-type: application/pdf");' but nothing. what should i do?

sorry if bad english

I tried to display inline pdf using CI4 but it return raw content of pdf (seem like postscript) instead return rendered content of pdf. it was not happen in CI3. I tried using 'header("Content-type: application/pdf");' but nothing. what should i do?

sorry if bad english

https://bcit-ci.github.io/CodeIgniter4/l...ng-headers

edit:
https://bcit-ci.github.io/CodeIgniter4/c.../http.html

I tried to display inline pdf using CI4 but it return raw content of pdf (seem like postscript) instead return rendered content of pdf. it was not happen in CI3. I tried using 'header("Content-type: application/pdf");' but nothing. what should i do?

sorry if bad english

https://bcit-ci.github.io/CodeIgniter4/l...ng-headers

edit:
https://bcit-ci.github.io/CodeIgniter4/c.../http.html

Still didnt work until i comment

Code:

$this->setContentType('text/html');

in /system/HTTP/Response.php