ion-refresher

概要(CONTENTS)

Ionic4项目中我们可以使用Ionic4下拉分页组件ion-refresher对项目进行布局。

ion-refresher官方文档地址:https://ionicframework.com/docs/api/refresher

The refresher provides pull-to-refresh functionality on a content component. The pull-to-refresh pattern lets a user pull down on a list of data using touch in order to retrieve more data.

Data should be modified during the refresher's output events. Once the async operation has completed and the refreshing should end, call complete() on the refresher.

ion-refresher 用法(Usage)


<ion-content>
  <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)">
    <ion-refresher-content>ion-refresher-content>
  ion-refresher>
ion-content>


<ion-content>
  <ion-refresher slot="fixed" pullFactor="0.5" pullMin="100" pullMax="200">
    <ion-refresher-content>ion-refresher-content>
  ion-refresher>
ion-content>


<ion-content>
  <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)">
    <ion-refresher-content
      pullingIcon="arrow-dropdown"
      pullingText="Pull to refresh"
      refreshingSpinner="circles"
      refreshingText="Refreshing...">
    ion-refresher-content>
  ion-refresher>
ion-content>
import { Component } from '@angular/core';

@Component({
  selector: 'refresher-example',
  templateUrl: 'refresher-example.html',
  styleUrls: ['./refresher-example.css'],
})
export class RefresherExample {
  constructor() {}

  doRefresh(event) {
    console.log('Begin async operation');

    setTimeout(() => {
      console.log('Async operation has ended');
      event.target.complete();
    }, 2000);
  }
}

<ion-content>
  <ion-refresher slot="fixed">
    <ion-refresher-content>ion-refresher-content>
  ion-refresher>
ion-content>


<ion-content>
  <ion-refresher slot="fixed" pull-factor="0.5" pull-min="100" pull-max="200">
    <ion-refresher-content>ion-refresher-content>
  ion-refresher>
ion-content>


<ion-content>
  <ion-refresher slot="fixed">
    <ion-refresher-content
      pulling-icon="arrow-dropdown"
      pulling-text="Pull to refresh"
      refreshing-spinner="circles"
      refreshing-text="Refreshing...">
    ion-refresher-content>
  ion-refresher>
ion-content>
import React from 'react';

import { IonContent, IonRefresher, IonRefresherContent } from '@ionic/react';

function doRefresh(event: CustomEvent) {
  console.log('Begin async operation');

  setTimeout(() => {
    console.log('Async operation has ended');
    event.target.complete();
  }, 2000);
}

const Example: React.SFC<{}> = () => (
  <>
    {/*-- Default Refresher --*/}
    <IonContent>
      <IonRefresher slot="fixed" onIonRefresh={doRefresh}>
        <IonRefresherContent>IonRefresherContent>
      IonRefresher>
    IonContent>

    {/*-- Custom Refresher ion-refresher 属性(Properties) --*/}
    <IonContent>
      <IonRefresher slot="fixed" onIonRefresh={doRefresh} pullFactor={0.5} pullMin={100} pullMax={200}>
        <IonRefresherContent>IonRefresherContent>
      IonRefresher>
    IonContent>

    {/*-- Custom Refresher Content --*/}
    <IonContent>
      <IonRefresher slot="fixed" onIonRefresh={doRefresh}>
        <IonRefresherContent
          pullingIcon="arrow-dropdown"
          pullingText="Pull to refresh"
          refreshingSpinner="circles"
          refreshingText="Refreshing...">
        IonRefresherContent>
      IonRefresher>
    IonContent>
  >
  }
);

export default Example
<template>
  
  <ion-content>
    <ion-refresher slot="fixed" @ionRefresh="doRefresh($event)">
      <ion-refresher-content>ion-refresher-content>
    ion-refresher>
  ion-content>

  
  <ion-content>
    <ion-refresher slot="fixed" pull-factor="0.5" pull-min="100" pull-max="200">
      <ion-refresher-content>ion-refresher-content>
    ion-refresher>
  ion-content>

  
  <ion-content>
    <ion-refresher slot="fixed" @ionRefresh="doRefresh($event)">
      <ion-refresher-content
        pulling-icon="arrow-dropdown"
        pulling-text="Pull to refresh"
        refreshing-spinner="circles"
        refreshing-text="Refreshing...">
      ion-refresher-content>
    ion-refresher>
  ion-content>
template>

<script lang="ts">
  import { Component, Vue } from 'vue-property-decorator';

  @Component()
  export default class Example extends Vue {

    doRefresh(event) {
      console.log('Begin async operation');

      setTimeout(() => {
        console.log('Async operation has ended');
        event.target.complete();
      }, 2000);
    }
  }
script>

ion-refresher 属性(Properties)

closeDuration

Description

Time it takes to close the refresher.

Attribute close-duration
Type string
Default '280ms'

disabled

Description

If true, the refresher will be hidden.

Attribute disabled
Type boolean
Default false

pullFactor

Description

How much to multiply the pull speed by. To slow the pull animation down, pass a number less than 1. To speed up the pull, pass a number greater than 1. The default value is 1 which is equal to the speed of the cursor. If a negative value is passed in, the factor will be 1 instead.

For example: If the value passed is 1.2 and the content is dragged by 10 pixels, instead of 10 pixels the content will be pulled by 12 pixels (an increase of 20 percent). If the value passed is 0.8, the dragged amount will be 8 pixels, less than the amount the cursor has moved.

Attribute pull-factor
Type number
Default 1

pullMax

Description

The maximum distance of the pull until the refresher will automatically go into the refreshing state. Defaults to the result of pullMin + 60.

Attribute pull-max
Type number
Default this.pullMin + 60

pullMin

Description

The minimum distance the user must pull down until the refresher will go into the refreshing state.

Attribute pull-min
Type number
Default 60

snapbackDuration

Description

Time it takes the refresher to to snap back to the refreshing state.

Attribute snapback-duration
Type string
Default '280ms'

ion-refresher 事件(Events)

Name Description
ionPull Emitted while the user is pulling down the content and exposing the refresher.
ionRefresh Emitted when the user lets go of the content and has pulled down further than the `pullMin` or pulls the content down and exceeds the pullMax. Updates the refresher state to `refreshing`. The `complete()` method should be called when the async operation has completed.
ionStart Emitted when the user begins to start pulling down.

ion-refresher 内置方法(Methods)

cancel

Description

Changes the refresher's state from refreshing to cancelling.

Signature cancel() => void

complete

Description

Call complete() when your async operation has completed. For example, the refreshing state is while the app is performing an asynchronous operation, such as receiving more data from an AJAX request. Once the data has been received, you then call this method to signify that the refreshing has completed and to close the refresher. This method also changes the refresher's state from refreshing to completing.

Signature complete() => void

getProgress

Description

A number representing how far down the user has pulled. The number 0 represents the user hasn't pulled down at all. The number 1, and anything greater than 1, represents that the user has pulled far enough down that when they let go then the refresh will happen. If they let go and the number is less than 1, then the refresh will not happen, and the content will return to it's original position.

Signature getProgress() => Promise