iOS 模拟器无法连接到开发服务器

Question

I am developing on MacOS XCode 12.3, simulator iOS 14.3 attempting to connect to a development server on a machine on the local network. I have an entry in /etc/hosts specifying the address of the development server. This used to work, and still works in Mac applications.

The app in the simulator cannot access the server . Safari in the simulator also cannot access the server.

The log shows nil host used in call to allowsSpecificHTTPSCertificateForHost and nil host used in call to allowsAnyHTTPSCertificateForHost:

I have set Allow Arbitrary Loads and Allow Arbitrary Loads in Web Content to true and added the server to Exception Domains in Info.plist .

How can I resolve this issue?

Answer 1

It turns out that the simulator no longer uses /etc/hosts . I set up a local DNS server dnsmasq and that allowed the simulator to access the server again.

See https://zhimin-wen.medium.com/setup-local-dns-server-on-macbook-82ad22e76f2a

Replace <servername> and <ipaddress> with your details.

> brew install dnsmasq
> cp /usr/local/etc/dnsmasq.conf /usr/local/etc/dnsmasq.conf.orig
> echo "conf-dir=/usr/local/etc/dnsmasq.d/,*.conf" > /usr/local/etc/dnsmasq.conf
> echo "address=/<servername>/<ipaddress>" > /usr/local/etc/dnsmasq.d/<servername>
> sudo mkdir -p /etc/resolver 
> echo "nameserver 127.0.0.1"> /etc/resolver/<servername>
> sudo brew services start dnsmasq

Test the DNS service:

> dig <servername> @localhost +short
> 192.168.20.21