Roaa 🦄💙 Profile picture
Dec 26, 2021 7 tweets 3 min read Read on X
Class constructors in #Dart
With some #Flutter use cases 💙

1️⃣ Generative Constructors
2️⃣ Constant Constructors
3️⃣ Named Constructors
4️⃣ Redirecting Constructors
5️⃣ Factory Constructors

A thread 🧵
#DartDev #FlutterDev #OOP
1️⃣ Generative Constructor
Most common form, initializes Class variables Image
2️⃣ Constant Constructors
It lets you create compile-time constants. This is especially important to create constant widgets in your Flutter app for better performance. Image
3️⃣ Named Constructors
Lets you create multiple constructors. For example, you can use named constructors to create multiple variations of your widgets Image
4️⃣ Redirecting Constructors
Has an empty body and calls the main constructor. Image
5️⃣ Factory Constructors
Used for complex properties initializations. Image
And there's the default constructor, which is a no-argument constructor generated when no constructor is declared. Image

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More from @roaakdm

Apr 18, 2022
#Flutter Animation guide 📑

1️⃣ Implicit - AnimatedFoo & TweenAnimationBuilder
2️⃣ Explicit - FooTransition, AnimatedBuilder & AnimatedWidget

1️⃣.1️⃣ Implicit - Ready-to-use
Add ‘Animated’ to a regular widget (Container, Positioned, .etc) with a duration and you’re good to go!

1/7
1️⃣.2️⃣ Implicit Animations - Custom

No AnimatedFoo widget fits your requirements and you still want something quick to set up? Use the #TweenAnimationBuilder widget! Simply changing the Tween values triggers an animation.

Use the child param for better performance!

2/7
2️⃣.1️⃣ Explicit - Ready-to-use

“Control” how your animations are animated with an #AnimationController and a #FooTransition widget (ScaleTransition, RotationTransition, …etc). You can now tell the animation when to start, reverse, repeat, ...etc

3/7
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