当我使用 admob flutter 时，位置 arguments 太多

Question

why i get this error Too many positional arguments: 0 expected, but 1 found. (Documentation) Try removing the extra positional arguments, or specifying the name for named arguments

final ams = AdMobService();

here in this code: Too many positional arguments: 0 expected, but 1 found. (Documentation) Try removing the extra positional arguments, or specifying the name for named arguments

@override void initState() { Admob.initialize(ams.getAdMobAppId()); }

  String getAdMobAppId() {
    if (Platform.isIOS) {
      return 'ca-app-pub-2334510780816542~6726672523';
    } else if (Platform.isAndroid) {
      return 'ca-app-pub-2334510780816542~7385148076';
    }
    return null;
  }

  String getInterstitialAdUnitId() {
    if (Platform.isIOS) {
      return 'ca-app-pub-3940256099942544/4411468910';
    } else if (Platform.isAndroid) {
      return 'ca-app-pub-3940256099942544/1033173712';
    }
    return null;
}```

Answer 1

Dart supports "positional" arguments and "named" arguments. Positional arguments are given by just using their position, but named arguments are provided like: name: value . For example:

void myCustomFunction(
  String name,  // positional argument
  {int? age,}   // named argument
) {
  // function body
}

You could then call this function like:

myCustomFunction("hello");  // "hello" is passed in to the parameter "name"
myCustomFunction(
  "hello",  // positional argument (1st argument in list)
  age: 10,  // named argument (we provide the name "age")
)

This error is saying "you gave me 1 positional argument, but the function didn't expect any positional arguments". To fix it, you need to do one of two possible things:

1. If Admob.initialize() has no parameters, just use Admob.initialize()
2. If Admob.initialize() has a named parameter for the API key, you will have to use something like Admob.initialize(apiKey: "your api key") (note that the actual name apiKey might be different, take a look at the documentation for admob)