rax-image
Image component for Rax.
Last updated 2 years ago by rax-publisher .
BSD-3-Clause · Repository · Bugs · Original npm · Tarball · package.json
$ npm install rax-image 
SYNC missed versions from official npm registry.

Image

npm

阿里内部同学推荐使用 @ali/rax-picture,对图片尺寸有很多内置的优化策略

支持

Web / Weex / 阿里小程序 / 微信小程序 / 字节跳动小程序

描述

用于展示图片

安装

$ npm install rax-image --save

引用

import Image from 'rax-image';

属性

属性 类型 默认值 必填 描述 支持
source object: { width: string, height: string, uri: string} - true 设置图片的 uri。height和width为可选项,优先级低于style上的同名属性,一般高于其他CSS中的同名属性。 browserweexminiAppwechatMiniprogrambytedanceMicroAppquickApp
style object: { width: number height: number } - true 图片样式 width 和 height 为必填属性,否则图片无法正常展示,可以补充其他属性 browserweexminiAppwechatMiniprogrambytedanceMicroAppquickApp
fallbackSource object: { width: string, height: string, uri: string} - false 备用图片的 uri(当主图加载失败时加载)。height和width为可选项,优先级低于style上的同名属性,一般高于其他CSS中的同名属性。 browserweex
loading string: 'eager' 'lazy' eager false 客户端如何加载图片,其中 Web 下需要浏览器原生支持loading属性。 browserminiAppwechatMiniprogrambytedanceMicroApp
resizeMode string: 'contain' 'cover' 'stretch' - false 决定当组件尺寸和图片尺寸不成比例的时候如何调整图片的大小 browserweexquickApp
mode String: scaleToFill false 小程序中的图片模式,可选项更多 miniAppwechatMiniprogrambytedanceMicroApp
quality string: 'original' 'normal' 'low' 'high' 'auto' - false 图片质量 weex
placeholder string - false 占位图的 URL,在图片下载过程中将展示占位图, 图片下载完成后将显示 source 中指定的图片。 weexminiApp
onClick function - false 点击图片时的回调函数 miniAppwechatMiniprogramquickApp
onLoad function - false 图片加载成功的回调函数 browserweexminiAppwechatMiniprogrambytedanceMicroAppquickApp
onError function - false 图片加载失败的回调函数 browserweexminiAppwechatMiniprogrambytedanceMicroAppquickApp
src string - false 图片下载完成后将显示 src 中指定的图片。 bytedanceMicroApp

onLoad onError 返回

当完成图片加载成功/失败时,将分别触发 onLoad/onError 中的回调函数 function(event) => {}

weex 下(iOS/Android)

成员 类型 描述
success boolean 标记图片是否成功加载,成功为 1/true,失败为 0/false
size object 加载的图片大小对象
size.naturalWidth number 图片宽度,如果图片加载失败则为 0/-1
size.naturalHeight number 图片高度,如果图片加载失败则为 0/-1

Web 下是 web 原生的 Event 事件

成员 类型 描述
target dom 图片自身元素
target.naturalWidth number 图片宽度
target.naturalHeight number 图片高度

小程序下

成员 类型 描述
type string 事件类型
detail object 点击位置信息
target object 点击对象属性信息
currentTarget object 同上

快应用下

成员 类型 描述
target object 图片自身元素
target.data.width number 图片宽度
target.data.height number 图片高度

示例

普通示例

import { createElement, render } from 'rax';
import DriverUniversal from 'driver-universal';
import Image from '../src/index';

const App = () => {
  const imageRef = useRef(null);
  return (
    <Image
      ref={imageRef}
      source={{
        uri: 'https://gw.alicdn.com/tfs/TB1bBD0zCzqK1RjSZFpXXakSXXa-68-67.png',
      }}
      style={{
        height: '68rpx',
        width: '67rpx',
      }}
    />
  );
};

render(<App />, document.body, { driver: DriverUniversal });

使用 fallbackSource 和 resizeMode

import { createElement, render } from 'rax';
import DriverUniversal from 'driver-universal';
import Image from '../src/index';

const App = () => {
  return (
    <Image
      source={{
        uri:
          'https://gw.alicdn.com/tfs/TB1g6AvPVXXXXa7XpXXXXXXXXXX-215-215.png',
      }}
      fallbackSource={{
        uri:
          'https://gw.alicdn.com/tps/i3/TB1yeWeIFXXXXX5XFXXuAZJYXXX-210-210.png_70x70.jpg',
      }}
      style={{
        width: '100rpx',
        height: '100rpx',
      }}
      resizeMode="cover"
    />
  );
};

render(<App />, document.body, { driver: DriverUniversal });

Current Tags

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