# flutter_card_swiper
[](https://pub.dev/packages/flutter_card_swiper)
[](https://pub.dev/packages/flutter_card_swiper)
[](https://pub.dev/packages/flutter_card_swiper)
[](https://pub.dev/packages/flutter_card_swiper)
[](https://github.com/ricardodalarme/flutter_card_swiper/blob/main/LICENSE)
This is a Flutter package for a Tinder-like card swiper. ✨
It allows you to swipe left, right, up, and down and define your own business logic for each direction.
Very smooth animations supporting Android, iOS, Web & Desktop.
## Why?
We built this package because we wanted to:
- Have a fully customizable slider
- Swipe in any direction
- Undo swipes as many times as you want
- Choose your own settings such as duration, angle, padding and more
- Trigger swipes in any direction with the controller
- Add callbacks while swiping, on end, or when the swiper is disabled
- Detect the direction (left, right, top, bottom) the card was swiped
## Show Cases
| Swipe in any direction | Trigger swipes | Unswipe the cards |
| ---------------------- | :------------- | :---------------- |
| 
| 
| 
|
| Fully customizable |
| ------------------ |
| 
|
## Installation
Add this to your package's `pubspec.yaml` file:
```yaml
card_swiper: ...
```
**OR** run
```yaml
flutter pub add flutter_card_swiper
```
in your project's root directory.
## Usage
You can place your `CardSwiper` inside of a `Scaffold` like we did here. Optional parameters can be defined to enable different features. See the following example:
```dart
import 'package:flutter_card_swiper/flutter_card_swiper.dart';
import 'package:flutter/material.dart';
class Example extends StatelessWidget {
List cards = [
Container(
alignment: Alignment.center,
child: const Text('1'),
color: Colors.blue,
),
Container(
alignment: Alignment.center,
child: const Text('2'),
color: Colors.red,
),
Container(
alignment: Alignment.center,
child: const Text('3'),
color: Colors.purple,
)
];
@override
Widget build(BuildContext context) {
return Scaffold(
body: Flexible(
child: CardSwiper(
cardsCount: cards.length,
cardBuilder: (context, index) => cards[index],
),
),
);
}
}
```
## Constructor
#### Basic
| Parameter | Default | Description | Required |
| -------------------------- | :------------------------------------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------: |
| cardBuilder | - | Widget builder for rendering cards | true |
| cardsCount | - | Number of cards | true |
| initialIndex | 0 | Index of the first card when the swiper is initialized | false |
| controller | - | Trigger swipe | false |
| padding | EdgeInsets.symmetric(horizontal: 20, vertical: 25) | Controller to trigger swipe actions | false |
| duration | 200 milliseconds | The duration that every animation should last | false |
| maxAngle | 30 | Maximum angle that the card can reach during swiping | false |
| threshold | 50 | Threshold from which the card is swiped away | false |
| scale | 0.9 | Scale of the card that is behind the front card | false |
| isDisabled | false | Set to `true` if swiping should be disabled, has no impact when triggered from the outside | false |
| isHorizontalSwipingEnabled | true | Set to `false` if you want your card to move only across the vertical axis when swiping | false |
| isVerticalSwipingEnabled | true | Set to `false` if you want your card to move only across the horizontal axis when swiping | false |
| isLoop | true | Set to `true` if the stack should loop | false |
| onTapDisabled | - | Function that get triggered when the swiper is disabled | false |
| onSwipe | - | Function that is called when the user swipes a card. If the function returns `false`, the swipe action is canceled. If it returns `true`, the swipe action is performed as expected | false |
| onUndo | - | Function that is called when the controller calls undo. If the function returns `false`, the undo action is canceled. If it returns `true`, the undo action is performed as expected | false |
| onEnd | - | Function that is called when there are no more cards left to swipe | false |
| direction | right | Direction in which the card is swiped away when triggered from the outside | false |
| numberOfCardsDisplayed | 2 | Number of cards to display at a time | false |
#### Controller
The `Controller` is used to swipe the card from outside of the widget. You can create a controller called `CardSwiperController` and save the instance for further usage. Please have a closer look at our Example for the usage.
| Method | Description |
| ----------- | :----------------------------------------------------------------------------------------------- |
| swipe | Changes the state of the controller to swipe and swipes the card in your selected direction. |
| swipeLeft | Changes the state of the controller to swipe left and swipes the card to the left side. |
| swipeRight | Changes the state of the controller to swipe right and swipes the card to the right side. |
| swipeTop | Changes the state of the controller to swipe top and swipes the card to the top side. |
| swipeBottom | Changes the state of the controller to swipe bottom and swipes the card to the bottom side. |
| undo | Changes the state of the controller to undo and brings back the last card that was swiped away. |
## Credits
- **Ricardo Dalarme** (Package maintainer)
- [**Appinio GmbH**](https://appinio.com) (Original project creator)