Is it possible to disable the network in iOS Simulator

Question

I am trying to debug some inconsistent behaviour I am seeing in an application that gets its primary data from the internet   I don t see the issues in the simulator  just on the device  so I d like to reproduce the network and connectivity environment in the simulator   Is there any way of disabling the network in the simulator    I am connecting to the Mac remotely to code  no other choice right now  so disabling the OS network isn t an option

User · Answer

You can throttle the internet connection with a 3rd party app such as  Charles  http   www charlesproxy com   Hit command   shift   T on a Mac to setup the throttling

User · Answer

Use a simple Faraday cage to block or limit the external RF signal level   You can make your own with aluminum foil   The openings should be smaller than the wavelength of your data service if that s what you want to block     800 Mhz has a 37 cm  14   wavelength  1900 Mhz has a 16 cm  6   wavelength   This works better with an actual device than with the simulator since the Mac is hard to work on when inside the Faraday cage  -

User · Answer

Download Additional tools package  Network Link Conditioner    Description   Example in Sierra

User · Answer

One probably crazy idea or patch    Just toggle the flag of network reachability  This is code which I use to toggle my flag runtime by triggering   Simulator Memory Warning  and its COMPLETELY SAFE  just make sure code should be in DEBUG Mode only  -  void applicationDidReceiveMemoryWarning  UIApplication   application     ifdef DEBUG     isInternetAvailable    isInternetAvailable   endif

User · Answer

You can use Little Snitch to cut off network traffic to any individual process  including ones that run on the iOS simulator  That way you can keep your internet connection and disconnect your running app

User · Answer

The only way to disable network on iOS simulator I know is using tools like Little Snitch or Hands Off  With them you can deny block any out- and ingoing network connections  You can set it up so that it only blocks connections from the simulator app  Works like a firewall

User · Answer

Since Xcode does not provide such feature  you will definitely go for some third party application  tool  Turning off the MAC network will also help to turn off the iOS Simulator network   You can turn off you MAC internet from  System Preferences        Network  and turn off the desire network source   To turnoff you MAC Ethernet internet source    To turnoff you MAC WiFi internet source if your MAC is on Wifi Internet

User · Answer

A simple solution is to create an Airplane Mode for your Mac  Here is how to do this    go into Network in System Preferences click on Location dropdown menu click on plus icon to add a new location name the new location  Airplane Mode  or similar  and click  Done  select the location you just created from the Location dropdown menu click on each available network interface in the list at the left of the window in turn  disabling each one  click on the Configure iPv4 menu  and choose Off for Wi-Fi  just click on the Turn Wi-Fi Off button click Apply  and this location will block all network activity   When you want to turn networking back on  just select Automatic from the Location dropdown menu  and click Apply   credit for this solution  http   hints macworld com article php story 20130325002258846

User · Answer

With Xcode 8 3 and iOS 10 3   XCUIDevice shared   siriService activate voiceRecognitionText   Turn off wifi   XCUIDevice shared   press XCUIDeviceButton home    Be sure to include  available iOS 10 3     at the top of your test suite file   You could alternatively  Turn on Airplane Mode  if you prefer   Once Siri turns off wifi or turns on Airplane Mode  you will need to dismiss the Siri dialogue that says that Siri requires internet  This is accomplished by pressing the home button  which dismisses the dialogue and returns to your app

User · Answer

You can use the network link conditioner on your Mac  You can download it from the apple developer website  It should be available where we get the older versions of Xcode and iOS  With this network conditioner you can change the strength of the network from wifi to no network    Also when you install the network conditioner it gets installed in the system preferences

User · Answer

If you have at least 2 wifi networks to connect is a very simple way is to use a bug in iOS simulator    quit from simulator  cmd-q  if it is open connect your Mac to one wifi  it may be not connected to internet  no matters  launch simulator  menu  xCode- Open Developer Tool- iOs Simulator  and wait while it is loaded switch wifi network to other one profit   The bug is that simulator tries to use a network  IP   which is not connected already   Until you relaunched simulator- it will have no internet  even if that first wifi network you connected had internet connection   so you can run  cmd-R  and stop  cmd-   project s  to use simulator without connection  but your Mac will be connected   Then  if you ll need to run simulator connected- just quit and launch it

User · Answer

You could use OHHTTPStubs and stub the network requests to specific URLs to fail

User · Answer

Just turn off your WiFi in Mac OSX this works a treat

User · Answer

I would suggest you using Charles Proxy app on Mac It allows you using Bandwidth Throttle feature that was created just for adjusting network connection Star Stop Throttling   command   T  Throttle Settings      command   T     shift   If you create you own Preset via Add Preset with Bandwidth 0 and 0 for Download and upload you can simulate no Internet connection  Also it is very useful to enable it only for some specific hosts As an alternative you can disable your connection on Mac because all traffic from Simulator go thought your computer

User · Answer

If your app is connecting to a specific domain  you can simply add it to your  etc hosts file and route it to a non-existing IP in your local network    For the application it will be the same as if there was no internet connection or the server is not reachable   sudo nano  etc hosts   add the following line   192 168 1 123   example com   or use 127 0 0 1 if you are not running a webserver on your local machine

User · Answer

you could disable the network of the host instead

User · Answer

Yes  In Xcode  you can go to Xcode menu item -  Open Developer Tools -  More Developer Tools and download  Additional Tools for Xcode   which will have the Network Link Conditioner   Using this tool  you can simulate different network scenarios  such as 100  loss  3G  High latency DNS  and more  and you can create your own custom ones as well

User · Answer

Just updating the answer to the current date  Since Xcode 4     there is a preferences pane in  Applications Utilities called Network Link Conditioner  Either you use one of the existent profiles or you create your own custom profile with 0 Kbps Up Downlink and 100  dropped

User · Answer

I m afraid not   the simulator shares whatever network connection the OS is using  I filed a Radar bug report about simulating network conditions a while back  you might consider doing the same

User · Answer

There are two way to disable IOS Simulator internet    Unplug your network connection  Turn Wi-Fi off   It s the simplest way

[ios] Is it possible to disable the network in iOS Simulator?

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