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Description:

appinio swiper

appinio_swiper is a Flutter package for a Tinder Card Swiper. ✨
It allows swiping in all directions with any Custom Widget (Stateless or Statefull).
Very smooth animations supporting Android, iOS & WebApp.
Why? #
We build this package because we wanted to:

have a complete customizable slider
be able to swipe in every direction
trigger unswipe however we want
choose our own settings for the swiper such as duration, angle, padding..
trigger swipe, swipe left/right or swipe up/down however we want
set swipe options and restrict horizontal or vertical swipe.
set loop for infinite scroll
update the list of cards between swipes.
Check in which direction the card is being swiped and modify your widget accordingly.- We can have any number of
background cards.
Pass any combination of swipe options.
NEW - check when user is swiping card back before reaching the threshold value.
NEW - Get current card index, offset and rotation
NEW - Programmatically animate card swipe.
NEW - We can have any number of background cards.
NEW - Pass any combination of swipe options.

❗NEW Features ❗ #
Animate the top card. #
Now you can arbitrarily animate the position of the top card using AppinioSwiperController.animatTo.
Listen to the card offset and rotation. #
Now you can track the offset and rotation of the top card by listening to the AppinioSwiperController.
Know when user is coming back without completely swiping the card. #
Now you can track if user is swiping the card back to the center with the CancelSwipe SwiperActivity.
Space background cards as per your requirement. #
Now you can decide the spacing between the background cards and can also hide them by
giving backgroundCardOffset = Offset.zero.
onSwipeCancelEvent. #
We have added onSwipeCancel event to check if the card swiped completely or if the swipe got canceled in the middle.
Add different combinations for swipe options. #
Now you can provide any combination of swipe options. For example: The user can swipe to the left and bottom but not
top, or any possible combination.
Show any number of background cards. #
Now you can decide how many background cards you want to show.
Listen to card swipes #
Now you can check in which direction the card is being swiped and modify your widget accordingly
Trigger swipe up and swipe down through controller #
You can now trigger swipe up and swipe down with our AppinioSwiperController regardless of the chosen swipe
direction (which is still used when swipe is called through the controller). Just like the swipeLeft and
swipeRight call, you can call swipeUp or swipeDown through the controller anywhere you want.
Restrict horizontal or vertical swipe #
You can now restrict the swipe in either horizontal directions or vertical directions using swipeOptions property.
Set looping for card swipe #
Now you can set the loop property to true and make the list infinitely scrollable.
Update the cards while swiping #
In this version we have replaced the list of cards with cardsBuilder. Now the widget only renders two cards at a
time which makes it lightweight and scalable. So you can perform operations on your card anytime.
Show Cases #

Trigger swipe right and swipe left however you want...

Unswipe the cards however you want...

Customize the angle...

Customize the threshold of the swiper, when the card should slide away...

Installation #
Create a new project with the command
flutter create MyApp
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Add
appinio_swiper: ...
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to your pubspec.yaml of your flutter project.
OR
run
flutter pub add appinio_swiper
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in your project's root directory.
In your library add the following import:
import 'package:appinio_swiper/appinio_swiper.dart';
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For help getting started with Flutter, view the online documentation.
Usage #
You can place your AppinioSwiper inside of a Scaffold or CupertinoPageScaffold like we did here. Optional
parameters can be defined to enable different features. See the following example..
import 'package:appinio_swiper/appinio_swiper.dart';
import 'package:flutter/cupertino.dart';

class Example extends StatelessWidget {

@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
child: SizedBox(
height: MediaQuery
.of(context)
.size
.height * 0.75,
child: AppinioSwiper(
cardsCount: 10,
onSwiping: (AppinioSwiperDirection direction) {
print(direction.toString());
},
cardsBuilder: (BuildContext context, int index) {
return Container(
alignment: Alignment.center,
child: const Text(index.toString()),
color: CupertinoColors.activeBlue,
);
},
),
),
);
}
}
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Constructor #
Basic

Parameter
Default
Description
Required

cardCount
-
Number of cards you want to render.
true

backgroundCardCount
1
Number of cards you want to render in background.
false

backgroundCardScale
.9
Scale factor for the background card.
false

backgroundCardOffset
-
Offset for the background card.
false

cardBuilder
-
Callback of the type CardsBuilder.
true

swipeOptions
-
value of type AppinioSwipeOptions to restrict swipes.
false

invertAngleOnBottomDrag
true
Sets whether the card should angle in the opposite direction when it is dragged from the bottom half.
false

controller
-
Trigger swipe, unSwipe and animateTo.
false

padding
EdgeInsets.symmetric(horizontal: 20, vertical: 25)
Control swiper padding
false

duration
200 milliseconds
The duration that every animation should last
false

cardsSpacing
40
The spacing between background cards.
false

maxAngle
30
Maximum angle the card reaches while swiping
false

threshold
50
Threshold from which the card is swiped away
false

isDisabled
false
Set to true if swiping should be disabled, has no impact when triggered from the outside
false

onTapDisabled
-
Function that get triggered when the swiper is disabled
false

onSwipeBegin
-
Called when user starts to swipe a card.
false

onSwipeEnd
-
Called swipe action completes.
false

onCardPositionChanged
-
Called when card position changes.
false

onEnd
-
Called when there is no Widget left to be swiped away
false

defaultDirection
right
Direction in which the card is swiped away when triggered from the outside
false

allowUnswipe
true
Set to false if unswipe should be disabled away
false

unlimitedUnswipe
false
Set to true if the user can unswipe as many cards as possible
false

onUnswipe
-
Called with the boolean true when the last card gets unswiped and with the boolean false if there is no card to unswipe
false

onSwipeCancelled
-
Gets called when the user leaves the card before the threshold is reached
false

Controller
The Controller is used to control the swipeDefault, swipeLeft, swipeRight, swipeUp
, swipeDown , unswipe and animateTo function of the swiper from outside of the widget. You can create a controller
called AppinioSwiperController and save the instance for further usage. Please have a closer look to 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.

swipeUp
Changes the state of the controller to swipe up and swipes the card to the up side.

swipeDown
Changes the state of the controller to swipe down and swipes the card to the down side.

unswipe
Changes the state of the controller to unswipe and brings back the last card that was swiped away.

animateTo
Animates the current offset of the card on top to the required Offset in a given duration.

Made with ❤ by Flutter team at Appinio GmbH