I can't solve 'Could not build the application for the simulator. '

Question

Yesterday, I created a flutter project named sample1. and I worked fine. but when I tried to open the file today and try to run it, I got an error.

the log says

Running "flutter pub get" in sample1...                            603ms
Launching lib/main.dart on iPhone 8 in debug mode...
Running pod install...                                           1,313ms
Running Xcode build...                                                  
Xcode build done.                                           11.8s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **


Xcode's output:
↳

    Command PhaseScriptExecution failed with a nonzero exit code
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Analyzing workspace
    note: Constructing build description
    note: Build preparation complete
    warning: Capabilities for Signing & Capabilities may not function correctly because its entitlements use a placeholder team ID. To resolve
    this, select a development team in the Runner editor. (in target 'Runner' from project 'Runner')

Could not build the application for the simulator.
Error launching application on iPhone 8.

I think I have tried everything written here, except the ones like

pub upgrade
pub run

because it says

zsh: command not found: pub

Could not build the application for the simulator. Error launching application on iPhone 11 Pro Max

The android version is working fine. Please kindly help me. Thank you

EDIT** I just created a new project and it seemed to be working fine but I am afraid it won't work next time I open it.

Answer 1

Before Anything you will first need to Run a successful Xcode build on your desired iOS device or Simulator directly from Xcode!

If you've successfully done so head over to : the instructions to run with Hot Reload⚡️ on iOS from VsCode & Android Studio

If not - Follow this 8 steps to getting your Xcode Build Up & Running ->

1. Open Xcode - do all the classic Set Up (Signing in with your dev account as a Team & choosing a UNIQUE bundle Identifier)

2. If you don't have cocoapods Installed on your Mac :

From terminal cd ~

then : for M1 Mac run the following :

arch -x86_64 sudo gem install ffi
sudo gem install cocoapods

while for intel macs just run :

sudo gem install cocoapods

3. Now once you have cocoapods installed on your machine

cd yourflutterprojectroot

flutter clean
flutter pub get

4. Update & install pods :

for M1 Macs :

cd ios
arch -x86_64 pod update
pod install
arch -x86_64 pod update

for intel macs :

cd ios
pod update
pod install
pod update

5. Connect your iPhone (if you want to run on real device)

In your iPhone Settings - set Auto-Lock to Never (& Unlock it !) - Connect your iPhone or iPad to Mac with USB cable & Accept Prompt "Trust Computer" on the iPhone

6. Run Xcode Build from Xcode make sure to Select your device or simulator

After running this alert should prompt select Ok

if this alert didn't prompt & build failed totally Try setting your Runner > Info > Configurations like this but first try to see if you can do step 7 - if you can do it don't change anything

7. In your iPhone Settings > General > A New Menu will have appeared - Navigate to it & Click « Verify App » or « Accept »

8. Now Run Xcode Build Again - it should build

— Xcode Build is done

💪🏽✨

---

Now -

You've done everything successfully 💪🏽✨ - congrats - it works -

• But what if you wanted to run directly from VSCode or Android Studio ?

It would make to long of a post - so i've split my answer for this second question :

find here the instructions to run with Hot Reload⚡️ on iOS from VsCode & Android Studio

See you there !

Answer 2

Run command like flutter pub upgrade not just pub upgrade.