This post is a follow up to Install root CA in Android.
The problem is the same here and the solution is somewhat similar too. First, export the CA certificate like explained in the Android specific post.
Email the certificate as an attachment to an email account you can access via Safari on your device. Only Safari seems to allow the cert to install. Open the attachment and you will see the following prompt.
Profile installation prompt
Allow. You may see a message about which device you want to install the certificate. If so, pick the device you need the cert installed.
Chose a device to install profile
Install Profile page will display with the cert to be imported.
Install profile page
Install and provide the device passcode.
Install profile warning. Should you trust this cert?
Another warning will show about risks of installing an unmanaged certificate. If you trust the certificate, go ahead and touch
Install again. You’re almost done now.
Lastly, you will need to go to
Settings > General > About > Certificate Trust Settings and toggle
enable full trust for root certificates. Again, only do this if you trust the certificate origin.
Trusting the certificate as root certificate
All done. You can now navigate SSL websites with certificates issued by the root CA you just installed.