Flutter Pub: Expected a key while parsing a block

问题:

I searched it on Stackoverflow but regarding flutter, I do not find any relevant solution, here and here may be the same question but they are not for flutter.

I'm using JSON file and register in Pubspec.ymal but showing error and also when I use an image and register it, the same error also occurs. Maybe there is a formatting mistake in it, but I don't know what is the problem with it.this is the documentation I followed.

Error on line 29, column 5 of pubspec.yaml: Expected a key while parsing a block mapping. assets: ^

This is my pubspec.yaml file

name: jsondata description: A new Flutter application.

  dependencies:  

  flutter:

  sdk: flutter

  cupertino_icons: ^0.1.0

  dev_dependencies:   

 flutter_test:

      sdk: flutter

    flutter:

    uses-material-design: true

      assets:

       - loadjson/person.json

回答1:

Spaces are significant in YAML

assets is indented too far

flutter_test:
  sdk: flutter

flutter:
  uses-material-design: true
  assets:
    - loadjson/person.json

回答2:

Error on line 29, column 4: Expected a key while parsing a block mapping. assets:

flutter: uses-material-design: true assets: - assets/images/image.jpg

In my case i just added # in front of uses-material-design: true

Try below code

flutter:   

  # uses-material-design: true 

   assets: 
    - assets/images/image.jpg

its working fine.

回答3:

In my case, uses-material-design intendation was broke. I put 1 (one) more space before it, and it worked fine.

回答4:

In My Case, the image was too large to load, decreasing dimension of image worked.

回答5:

i just remove the # form this line (uses-material-design: true).It's worked.

回答6:

I faced the same problem; you need to make sure those top level flags and all are correctly indented. Spaces are very important in that pubspec.yaml section