Image

描述

用于展示图片

安装

$ npm install rax-image --save

引用

import Image from 'rax-image';

属性

注： 1、支持列表中的代表 Web 代表 weex 代表阿里小程序代表微信小程序

属性	类型	默认值	必填	描述
source	`object: {uri: string}`	-	true	设置图片的 uri
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
fallbackSource	`object: {uri: string}`	-	false	备用图片的 uri（当主图加载失败是加载）
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
mode	String:	scaleToFill	false	小程序中的图片模式，可选项更多
quality	`string: 'original' 'normal' 'low' 'high' 'auto'`	-	false	图片质量
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。
onClick	`function`	-	false	点击图片时的回调函数
onLoad	`function`	-	false	图片加载成功的回调函数
onError	`function`	-	false	图片加载失败的回调函数

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

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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