IOS supports setting browser proxies in the network. If you need to set proxies or global proxies for other applications, you will need to use proxy tools such as Shadowrocket. Firstly, you need to install Shadowrocket from APP-STORE.
Enter Shadowrocket and click the “Plus” sign in the upper right corner.
CIick “Type” to choose your proxy type,such as socks5.
Fill in your proxy information, disable UDP Relay, and suggest enabling TCP Fast Open.
Click “Connectivity Test” to check if the proxy is avaliable.Then click the button to start the proxy.