native background in the javascript import module which is seen from the top of the code like this
import {some_fun} from "some_package";
but in dart how to find which module is imported from which package for e.g.
import "package/material.dart";
and many more
how to know which package contain which function or classes
To find that out. In Android Studio or VSCode just hover over the name of the package you are importing. In this case 'package/material.dart' and press ctrl+click.
It will redirect you to the code and you can see all the functions,classes and variables. Just remember anything starting with _(underscore) is private and can not be used in other classes. However if they have setters and getters defined for them then they can be accessed.
Related
I am going to use Package Manager class in my code, but in android studio it is not recognizable class for it . I want to add dependency for it , but I do not know that how to search dependency related to this class on google so that I can easily find it and can add it to graddle.build file.
You can search for classnames in MavenCentral:
https://search.maven.org/
with c:yourClassName
I know that the availability of dart.library.html can be used as the condition for web, but what about desktop?
Although I suppose you can import a particular package for desktop and not for mobile if you create and use a new package in which different packages are specified for different platforms in pubspec.yaml as explained in the document,
it seems a little redundant to make such a package for that purpose.
Is it possible just by using a statement of the import 'foo.dart' if (...) 'bar.dart' style, and if possible, what library is put in its if (...) part?
You cannot use conditional imports to get different behavior between mobile and desktop; see this comment from the Dart team.
I am creating a Flutter project targeting of Android/iOS and Web is there any way to add the supported packages separately for both the Flutter Mobile and Web. For example, I am using the dart:io package in Flutter mobile applications to save the files, but it is not supported in Flutter web, so for web, I am using the dart:js package to download the files in the web application.
For C# we are simply using conditional symbols but Flutter I could not found any solution.
The problem is I could not import both the packages in my main.dart file. Can anyone help me to achieve this
Dart has conditional imports that can be conditioned on the availability of platform libraries.
That means that you can create one library in your package which uses dart:io, and another which uses dart:js, and then import whichever of these is supported.
import "file_loader.dart" // Version which just throws UnsupportedError
if (dart.library.io) "file_loader_io.dart"
if (dart.library.js) "file_loader_js.dart";
// Use imported API.
The important part is that you give these libraries the same API - the same types
with the same members, and the same top-level function - so that no matter which library is imported, the code that uses it is still valid.
When you compile the program, only one of the libraries will be used, so you won't get warnings if the other libraries are incorrect. You should test the code on all the supported platforms, just to be sure.
You should implement code separately, for example, my_ui_web.dart and my_ui_mobile.dart
Then you can import those files using if:
import 'package:my_awesome_app/my_ui_mobile.dart'
if (dart.library.html) 'package:my_awesome_app/my_ui_web.dart'
as myUI;
I created a library that uses the native navigation controller to navigate through react and native screens. The library is written in Swift and contains some objective-c code to setup the React bridge etc. Currently I can distribute this library through CocoaPods by creating a podspec and defining the React dependency there. However, this forces the user to setup React in their project through CocoaPods as well (like so: https://facebook.github.io/react-native/docs/integration-with-existing-apps.html). I'd like them to use the react-native link or manually linking option as well (like so: https://medium.com/#joshyhargreaves/adding-react-native-to-existing-ios-project-without-cocoapods-6f1ee9106009).
If I understand correctly I can create a static library and distribute that. So far I created this static library, added my mixed swift and objective-c code and tried to manually link it into my main project. This however produces an error in one of my classes inside my static library where I import React like so import React. Error is "No such module 'React'.
I updated the Header Search Paths of my static library to contain:
$(SRCROOT)/../react-native/React
and
$(SRCROOT)/../React
(react-native, React and my own lib are all inside the node_modules folder)
both set to recursive. Unfortunately it still doesn't find the module React. Does anyone know how to create a static library that contains a dependency with React?
The end goal would be to import this static library in my main project like import MyStaticNaivationLib in one of my viewcontrollers and subclass from a class that's defined in my static library.
My main project also uses https://github.com/rebeccahughes/react-native-device-info. This looks exactly what I want to achieve. It's a static library that has a dependency with React ("import RCTBridgeModule.h") which I can manually link in my main project. Only difference is that this project doesn't contain Swift code.
I wrote a custom module for the company, and you can view my documentation. This custom module have inner framework and I link this framework to the main project. In your custom_modulem do you have package.json with this?
"peerDependencies": {
"react": "16.8.3",
"react-native": "0.59.4"
}
https://github.com/Hardy1207/RNOkay
i've added a plugin called Image tool plugin for image resizeing... but when i called an instance of it
def imageTool = new ImageTool()
it gives me compilation error cause it can't resolve ImageTool class . i've tried to put import
import org.grails.plugins.imagetools.ImageTool
as a suggestion from a site .. but it didn't work .. so what is the real path to the imageTool so i can import it?? any help please:)
You can't access a class from the default package in a class that's in a package, and ImageTool is in the default package. The easiest thing to do is move that class into a subfolder, e.g. src/imagetool and add "package imagetool" to the source. You'll need to do this for each developer.
The plugin has moved to http://github.com/ricardojmendez/grails-imagetools/ and this has been fixed in that code, but I don't know if they have done a new release.