Poppy Cooke

Poppy Cooke

1559807630

What SwiftUI Means for Flutter

On June 3 at WWDC ’19 Apple made a lot of big announcements, but an important one that didn’t quite make the top news headlines was the release of SwiftUI, a new declarative UI framework for building iOS (and iPadOS/macOS/watchOS/tvOS) apps. Of course, for software developers this was probably the most exciting news of all. After all, how many of us can actually afford the new Mac Pro?

The reason why developers are so excited is that Apple has finally joined the modern era of declarative UI programming. Apple developers had to sit on the sidelines as the likes of React Native and Flutter showed off their ability to drastically improve code simplicity and reduce development times with hot reloading. Apple developers also sighed as Google announced Jetpack Compose, a new declarative UI framework for Android, at I/O ’19. So when Apple made the SwiftUI announcement it was rightly met with collective gasps and cheers in the audience.

What we are witnessing is a continuation of the declarative UI programming revolution that was started by React. Thanks Facebook! That needs to be recognized and applauded. Flutter also deserves credit for getting us to this point. Flutter is one of the top 10 most-starred repos on Github, was recently ranked the #3 most loved framework in the 2019 Stack Overflow developer survey, and is the #1 fastest-growing skill among software engineers by LinkedIn. As an experienced native iOS developer who converted to Flutter 2 years ago and never looked back, I have a vested interest in watching the Flutter community succeed. So how should we interpret the SwiftUI announcement?

What is declarative UI programming anyway?

For those new to the topic, I want to briefly describe what declarative UIprogramming actually is. So, it turns out that writing UI code is arguably the most complicated part of any modern application. Today’s mobile/desktop/web apps have to be responsive, handle device rotation, dynamic font sizes, light/dark mode, different themes, user customizations, role-based permissions, feature-flagging, and A/B testing. Now throw a couple of animations on top of all that. Oh yeah, and make everything delightful. And finish it by yesterday.

Before declarative UI programming, you would typically write your code in the following fashion: Handle the login button. Show the busy spinner. Call the backend. Hide the busy spinner. Redirect to the home screen. Show a popup on failure. In this “imperative” paradigm, you directly change individual parts of your UI in response to various events. Seems simple, but as an app gets more complex, it gets harder to update without things breaking unexpectedly. Things get complicated real fast. It becomes difficult to see the relationship between events and handle edge cases. That’s why sometimes you see apps in bizarre, inconsistent UI’s. It is the result of a combination of states that the developers did not expect.

When imperative UI programming goes wrong.

In contrast, in a “declarative” paradigm, the user interface is “declared” as a function of some data that represents it. That data is called state. As that state changes, the UI updates automatically. So, using the same example above: If no user, show login. If user, show home. If busy, show spinner. If failure, show error. The difference is that all the different states are accounted for in one place, preventing unexpected or inconsistent results. The result is usually:

  • Vastly reduced complexity
  • Fewer lines of code
  • Improved code quality
  • Reduced development times

It’s no wonder that developers love it. So Apple joining the party is kind of a big deal. It validates the declarative paradigm for the whole Apple community.

What does this mean for Flutter?

I love Flutter. It took what React Native started and ran with it. With its native performance, zero dependencies on native platform UI components, and ability to support iOS, Android, Mac, Windows, IOT, and Web, I am convinced that it is the best choice for modern application development. I am also amazed at how it has captured the mindshare of beginners and experienced native mobile developers alike. I do want to see it succeed.

In the immediate term, SwiftUI will probably reduce the incentive for Apple-only developers to adopt Flutter. Developers will be able to receive many of Flutter’s benefits including declarative UI architecture as well as hot reload, which will alleviate the pain of Swift’s famously slow compile times. However, since SwiftUI only works on iOS 13 and up, apps will still have to support the old imperative style for several years before fully transitioning. That means potentially maintaining two entirely separate UI codebases for a long time!

With Flutter, Apple developers will see that they can use the same declarative UI techniques they have already learned, but also run their code on many more platforms.

In the longer term I think that Flutter will ultimately benefit from SwiftUI. Inevitably, the pressure will mount on Apple-only developers to port their apps to other platforms such as Android, Windows, and Web. With Flutter, Apple developers will see that they can use the same declarative UI techniques they have already learned, but also run their code on many more platforms. At that point, Flutter will be there waiting with open arms. Interesting in getting a head start?

Thanks for reading

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Further reading

Learn Flutter & Dart to Build iOS & Android Apps

Flutter & Dart - The Complete Flutter App Development Course

Dart and Flutter: The Complete Developer’s Guide

Flutter - Advanced Course

Flutter Tutorial - Flight List UI Example In Flutter

Flutter Tutorial for Beginners - Full Tutorial

Using Go Library in Flutter

Parsing JSON in Flutter

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Buddha Community

What SwiftUI Means for Flutter

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

sksl_warm-up

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

flutter_autofill

A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.

flutter_DatePicker

New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry  Tremblay

Terry Tremblay

1598396940

What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

flutter-mobile-desktop-web-embedded_min

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

humming_bird_dart_flutter

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

Dream11

Dream11

NuBank

NuBank

Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.

Brain  Crist

Brain Crist

1602147600

Flutter App Development Trends 2020

As the new decade dawns upon us, a slew of technologies has been making a lot of noise to grab the developers’ attention. While native app development is going strong, the trade winds are now blowing towards going cross-platform.

Adobe PhoneGap, React Native, Xamarin and Ionic are all leaving no stone unturned to be the undefeated champion of cross-platform development. Still, Google’s Flutter is all set to take them all on at once.

There are a tonne of resources available online to learn about Flutter, and you can start with this step by step flutter guide.

With reduced code development time, increased time-to-market speed, near-native performance, and a bevy of advantages under its hood, Flutter is set to dominate the market this decade.

Before we take a look at trends making the Flutter race ahead in 2020, let us do a quick recap of what Flutter is, for those who have been living under a rock.

#flutter #flutter-for-mobile-app #flutter-app-development #mobile-app-development #flutter-trends #software-development #advantages-of-flutter-mobile #pros-and-cons-of-flutter

Hertha  Mayer

Hertha Mayer

1595334123

Authentication In MEAN Stack - A Quick Guide

I consider myself an active StackOverflow user, despite my activity tends to vary depending on my daily workload. I enjoy answering questions with angular tag and I always try to create some working example to prove correctness of my answers.

To create angular demo I usually use either plunker or stackblitz or even jsfiddle. I like all of them but when I run into some errors I want to have a little bit more usable tool to undestand what’s going on.

Many people who ask questions on stackoverflow don’t want to isolate the problem and prepare minimal reproduction so they usually post all code to their questions on SO. They also tend to be not accurate and make a lot of mistakes in template syntax. To not waste a lot of time investigating where the error comes from I tried to create a tool that will help me to quickly find what causes the problem.

Angular demo runner
Online angular editor for building demo.
ng-run.com
<>

Let me show what I mean…

Template parser errors#

There are template parser errors that can be easy catched by stackblitz

It gives me some information but I want the error to be highlighted

#mean stack #angular 6 passport authentication #authentication in mean stack #full stack authentication #mean stack example application #mean stack login and registration angular 8 #mean stack login and registration angular 9 #mean stack tutorial #mean stack tutorial 2019 #passport.js