The problem of blurred display of pdf.js on iOS side

in h5, I have a requirement to display pdf files on mobile. I use the pdf.js method, and the framework uses the actual effect of angularjs,. There is no problem on Android, and the display on iOS is very blurred. Is there a solution?
Android end effect:

ios:

of course, both of them use the same code. How to solve the problem of ambiguity on ios

Hybrid-app javascript pdf html5
Jun.10,2021

window.devicePixelRatio
can be searched. Or look at the source code.
related to canvas drawing

I just found a problem when I looked at the source code. Thank you. The reason is that there is a problem when using angularjs to encapsulate pdf instructions

.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-42a76d9-6063.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-42a76d9-6063.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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