Dart 1升级至Dart 2.4后Router组件适配问题求助

Hey there! Let's work through those Router errors you're hitting during your Dart 1 to Dart 2.4 upgrade. Angular's Router API went through some significant changes between these versions, so those errors are totally expected—here's how to fix them:

1. Replacing the removed generate method #

In Dart 2.x, the Router.generate() method was removed entirely. Instead, you can use either generateUrl() for direct URL string generation, or combine createUrlTree() + serializeUrl() if you need more control over the URL structure.

Updated code for the new window case: #

// Option 1: Quick URL generation with generateUrl
var url = _router.generateUrl(routeName, queryParams: parameters);
window.open(url, "_blank");

// Option 2: More flexible approach with UrlTree
var urlTree = _router.createUrlTree([routeName], queryParams: parameters);
var url = _router.serializeUrl(urlTree);
window.open(url, "_blank");

Note: Use queryParams for query string parameters (like ?id=123). If your parameters are path parameters (embedded in the URL path like /user/123), pass them directly in the list for createUrlTree, e.g., _router.createUrlTree([routeName, parameters['userId']]).

2. Fixing the navigate method argument mismatch #

The Router.navigate() method no longer accepts a List as its first parameter. In Dart 2.x, you have two straightforward options to fix this:

• Pass the route name directly and attach parameters via named arguments
• Use navigateByUrl() with a pre-built URL string

Updated code for the navigation case: #

// Option 1: Navigate with route name and parameters
_router.navigate(routeName, queryParams: parameters);

// Option 2: Navigate using a pre-generated URL string
var url = _router.generateUrl(routeName, queryParams: parameters);
_router.navigateByUrl(url);

Additional Important Checks #

• Ensure you're importing the correct packages: For Dart 2.x Angular, the Router lives in the angular_router package. Update your imports to:

  import 'package:angular_router/angular_router.dart';
  import 'package:angular/angular.dart'; // For @Injectable decorator
  

• Verify your pubspec.yaml includes the angular_router dependency, matching your Angular Dart version compatible with Dart 2.4.

That should resolve both errors and get your SpRouterImpl working as expected in Dart 2.4!

内容的提问来源于stack exchange，提问作者Subramanian