VS Code 和 Flutter/Dart，小部件自动完成功能不起作用

Question

I'm working with some tutorials to learn Flutter and the one that I'm taking now uses VSCode. I actually prefer it to Android Studio because it doesn't overheat my Macbook. The only frustration I've had with it so far is that there are quite a few times where autocomplete just stops working. For instance, if I wrap a Column in a widget and then start typing Container, Android Studio will pop up an autocomplete showing Container VS Code used to do this for me, but has stopped for some reason. I can still get the autocomplete list if I press Ctrl+Spacebar.

I'm using the following:

• VS Code - 1.36.1

• Dart Extension - 3.2.0

• Flutter Extension - 3.2.0

• Material Icon Theme - 3.8.0

This is the latest version for all of these.

Is there some setting or something that I need to change? I've spent the last two hours trying to work out what's going on. In searching, I did see some references to earlier versions of VS Code and the extensions causing problems, but nothing about these versions.

Answer 1

Go to pubspec.yaml and hit save or run get packages. It worked for me, hope it helps

Answer 2

There are generally two reasons for VS Code to automatically open code completion - 1) when you press a key that the extension ahs told VS Code should invoke it and 2) when VS Code thinks it would be useful (for example when you start typing on a blank line). If you're typing in a line of existing code it won't always do this.

Pressing Ctrl+Space is the correct way to open completion in the cases where it doesn't appear automatically.

That said, if you can provide more information about a specific instance, I can take a look if it's something we could/should pop completion open for. It would be best raised at https://github.com/Dart-Code/Dart-Code/issues with a screenshot and details of exactly where your cursor is (and how you got there).

Answer 3

不要使用太多的flutter扩展，我也面临这个问题，然后我意识到安装了3个flutter扩展，只使用一个，对我有用，试试看。

Answer 4

I did have a derivative of this problem when I was working with VS Code and flutter and this is what I did. This is for windows though. This is what I did ; Go to C:\\Users<your username >\\AppData\\Roaming\\Code and delete all the files and the directory called "Code". Usually the folder AppData is hidden so you'll have to unhide it. Then restart your computer and then reopen VS Code. This I think cleared some of the unwanted cache files which kind of made things right again. Hope it helped.

Answer 5

PAY ATTENTION!! Check if your operation system take the same shortcut that the VSCODE Intellisense use for code completion. For example: if the Operational System of your laptop use control+space for change the input language of your keyboard, this shorcut will work for operational system only. It's need to disable in the settings keyboard. After this, the intellisense autocomplete must work well. It's works for me!

Answer 6

Doing a flutter clean and then flutter pub upgrade worked for me. Sometimes flutter clean using the command line does not work if you have android studio then in tools go to flutter and then do flutter clean.

Answer 7

Make sure

Preferences > Editor > Intentions > Quick assist powered by the Dart Analysis Server

is enabled ( Screenshot ).

If so, most likely your Dart Analysis server is crashing. Navigate to your HOME folder:

cd ~

And then below should resolve your issue:

sudo chown -R $USER .dart .flutter

Clear your cache if the issue still exists:

File > Invalidate Caches > Clear file system cache and Local History > Invalidate and Restart.

Also, Power Save Mode should be disabled:

File > Power Save Mode

Answer 8

just do flutter clean then flutter create. and then flutter pub upgrade, and also see if your flutter SDK is latest or not.

Answer 9

Check to make sure Android Studio is not on low power mode

Menu>File>Low Power Save Mode

Answer 10

I solved in in my Macbook Pro by

Going to System Preferences > Keyboard > Shortcuts > Input Sources

Disable: Select the previous input source (^ space)

Updating VS Code dart and flutter extensions

Restarting the computer.

And voila. Ctrl + space now shows options in VS Code.