flutter swiper

the best swiper for flutter , with multiple layouts, infinite loop. compatible with android & ios.

new features: pagetransformer

finally, we have pagetransformer like android, just set a transformer to swiper, it returns a widget that has been transformed. for now, only support for layout default. thanks to @flutterrocks, you’ve done a great job.

we are now using this project transformer_page_view.

new features: layout

showcases

installation

add

flutter_swiper : ^lastest_version

to your pubspec.yaml ,and run

flutter packages get 

in your project’s root directory.

basic usage

create a new project with command

flutter create myapp

edit lib/main.dart like this:

import 'package:flutter/material.dart';

import 'package:flutter_swiper/flutter_swiper.dart';

void main() => runapp(new myapp());

class myapp extends statelesswidget {
  @override
  widget build(buildcontext context) {
    return new materialapp(
      title: 'flutter demo',
      theme: new themedata(
        primaryswatch: colors.blue,
      ),
      home: new myhomepage(title: 'flutter demo home page'),
    );
  }
}

class myhomepage extends statefulwidget {
  myhomepage({key key, this.title}) : super(key: key);

  final string title;

  @override
  _myhomepagestate createstate() => new _myhomepagestate();
}

class _myhomepagestate extends state<myhomepage> {

  @override
  widget build(buildcontext context) {
    return new scaffold(
      appbar: new appbar(
        title: new text(widget.title),
      ),
    body:  new swiper(
        itembuilder: (buildcontext context,int index){
          return new image.network("http://via.placeholder.com/350x150",fit: boxfit.fill,);
        },
        itemcount: 3,
        pagination: new swiperpagination(),
        control: new swipercontrol(),
      ),
    );
  }
}

constructor

basic

parameter	default	description
scrolldirection	axis.horizontal	if axis.horizontal, the scroll view’s children are arranged horizontally in a row instead of vertically in a column.
loop	true	set to false to disable continuous loop mode.
index	0	index number of initial slide.
autoplay	false	set to true enable auto play mode.
onindexchanged	void onindexchanged(int index)	called with the new index when the user swiped or autoplay
ontap	void ontap(int index)	called when user tap ui.
duration	300.0	the milliscends of every transaction animation costs
pagination	null	set new swiperpagination() to show default pagination
control	null	set new swipercontrol() to show default control buttons

pagination

the pagination extends from swiperplugin,the swiperplugin provides extra ui for swiper.set new swiperpagination() to show default pagination.

parameter	default	description
alignment	alignment.bottomcenter	change this value if you what to put pagination in other place
margin	const edgeinsets.all(10.0)	the distance between inner side of the parent container.
builder	swiperpagination.dots	there are two default styles swiperpagination.dots and swiperpagination.fraction,both can be customized.

if you’d like to customize your own pagination, you can do like this:

new swiper(
    ...,
    pagination:new swipercustompagination(
        builder:(buildcontext context, swiperpluginconfig config){
            return new yourownpaginatipon();
        }
    )
);

control buttons

the control also extends from swiperplugin,set new swipercontrol() to show default control buttons.

parameter	default	description
iconprevious	icons.arrow_back_ios	the icon data to display previous control button
iconnext	icons.arrow_forward_ios	the icon data to display next.
color	theme.of(context).primarycolor	control button color
size	30.0	control button size
padding	const edgeinsets.all(5.0)	control button padding

controller

the controller is used to control the index of the swiper, start or stop autoplay.you can create a controller by new swipercontroller() and save the instance by futher usage.

method	description
void move(int index, {bool animation: true})	move to the spicified index,with animation or not
void next({bool animation: true})	move to next
void previous({bool animation: true})	move to previous
void startautoplay()	start autoplay
void stopautoplay()	stop autoplay

autoplay

parameter	default	description
autoplaydelay	3000	autoplay delay milliseconds.
autoplaydisableoninteraction	true	if set true, autoplay is disabled when use swipes.

build in layouts

new swiper(
  itembuilder: (buildcontext context, int index) {
    return new image.network(
      "http://via.placeholder.com/288x188",
      fit: boxfit.fill,
    );
  },
  itemcount: 10,
  viewportfraction: 0.8,
  scale: 0.9,
)

new swiper(
  itembuilder: (buildcontext context, int index) {
    return new image.network(
      "http://via.placeholder.com/288x188",
      fit: boxfit.fill,
    );
  },
  itemcount: 10,
  itemwidth: 300.0,
  layout: swiperlayout.stack,
)

new swiper(
    itembuilder: (buildcontext context, int index) {
      return new image.network(
        "http://via.placeholder.com/288x188",
        fit: boxfit.fill,
      );
    },
    itemcount: 10,
    itemwidth: 300.0,
    itemheight: 400.0,
    layout: swiperlayout.tinder,
 )

very easy to create you own custom animation:

 new swiper(
  layout: swiperlayout.custom,
  customlayoutoption: new customlayoutoption(
      startindex: -1,
      statecount: 3
  ).addrotate([
    -45.0/180,
    0.0,
    45.0/180
  ]).addtranslate([
    new offset(-370.0, -40.0),
    new offset(0.0, 0.0),
    new offset(370.0, -40.0)
  ]),
  itemwidth: 300.0,
  itemheight: 200.0,
  itembuilder: (context, index) {
    return new container(
      color: colors.grey,
      child: new center(
        child: new text("$index"),
      ),
    );
  },
  itemcount: 10)

the customlayoutoption is designed to describe animations.
it is very easy to specify every state of items in swiper.

new customlayoutoption(
      startindex: -1,  /// which index is the first item of array below      
      statecount: 3    /// array length 
  ).addrotate([        // rotation of every item 
    -45.0/180,
    0.0,
    45.0/180
  ]).addtranslate([           /// offset of every item
    new offset(-370.0, -40.0),
    new offset(0.0, 0.0),
    new offset(370.0, -40.0)
  ])

codes

new constrainedbox(
  child: new swiper(
    outer:false,
    itembuilder: (c, i) {
      return new wrap(
        runspacing:  6.0,
        children: [0,1,2,3,4,5,6,7,8,9].map((i){
          return new sizedbox(
            width: mediaquery.of(context).size.width/5,
            child: new column(
              mainaxissize: mainaxissize.min,
              children: <widget>[
                new sizedbox(
                  child:  new container(
                    child: new image.network("https://fuss10.elemecdn.com/c/db/d20d49e5029281b9b73db1c5ec6f9jpeg.jpeg%3fimagemogr/format/webp/thumbnail/!90x90r/gravity/center/crop/90x90"),
                  ),
                  height: mediaquery.of(context).size.width * 0.12,
                  width: mediaquery.of(context).size.width * 0.12,
                ),
                new padding(padding: new edgeinsets.only(top:6.0),child: new text("$i"),)
              ],
            ),
          );
        }).tolist(),
      );
    },
    pagination: new swiperpagination(
      margin: new edgeinsets.all(5.0)
    ),
    itemcount: 10,
  ),
    constraints:new boxconstraints.loose(new size(screenwidth, 170.0))
),

121

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