Build Flutter app in release mode for iOS

Building steps

If you have problems using flutter command in terminal because it is not found - read Configuring steps below.

Step 1

Open terminal, run command

cd /Users/John/myFlutterApp/

Run

flutter build ios

Open Xcode and run .xcworkspace file in iOS folder. It should now work smoothly and Slow mode banner should be gone.

Configuring steps

Step 1

Locate folder where flutter is installed on your mac. If it was installed using Android Studio. Just open Android Studio create new flutter project and you will see Flutter SDK path.For example let it be /Users/John/flutter/

Step 2

open terminal on your Mac and run

cd /Users/John/

As you can see we are now one level up from SDK path

Step 3

run

export PATH=`pwd`/flutter/bin:$PATH

If you now run flutter in terminal you should see list of available params. So you can run

flutter doctor

To check is everything is fine with installation.Now flutter command only works for this terminal session. And if you close it and later open it again and run fuller command - you will get error that this command is unknown. So you want to save flutter command to be available even after terminal was closed.

Step 4

run

open ~/.bash_profile

you will see text editor where you need to paste

export PATH=/Users/John/flutter/bin:$PATH

save file. If you close terminal now and open it again - you should be able to run flutter command.

Even after running flutter build ios, Xcode always ran the Debug version (slow mode).

To solve this, I had to change the Build Configuration of the Run schema:

1. Click on Runner, and Edit scheme

2. Select Release for the Build Configuration of the Run schema

Hoping this is helpful.

You could do it from Android Studio directly as well.

> Run
> Flutter Run 'main.dart' in Release Mode