Where is the privacy setting of Apple's mobile phone?

The privacy features of Apple iOS are as follows: 1. Some applications will only request to use your location when using it. When you actively use an App in the foreground, or the app runs in the background (indicated by the status bar), the app is regarded as "in use"; 2. Turn location service on or off: in Settings >; Privacy > turn location services on or off in location services; 3. turn system services, location services and permissions on and off: settings > privacy > location services > system services.