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Image

  • category: UI
  • chinese: 图片
  • type: UI组件

设计思路

在 native 端对 image 标签封装,在 web 端使用 img 完成适配。

** 注意,在 native 端,图片必须声明宽高才能绘制,否则无法展现。**

API

属性配置说明类型默认值
source【即将废弃】图片 URL,格式 {uri:"xxx"}object
src新增,与 source api 含义相同string
style必须写宽高,否则无法渲染object
resizeMode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枚举类型,可选 contain cover stretchstretch
onLoad图片 onLoad 方法,其中 e.size 可返回图片真实宽高function(e)
quality是否无损,凡是 alicdn 的图片地址,默认开启压缩,如果 quality 设置为 original,则不压缩图片function(e)

注意,src api ,

  • 图片 url

    • 建议使用 https 协议。
    • 建议不要使用相对路径。
    • 开发阶段,您如果需要任意尺寸图片,可以使用 placeholder 占位符服务, 如:
     <Image source={{uri:"https://via.placeholder.com/350x150"}} style={{width:350,height:150}} quality="original"/>
    
  • resizeMode 释义

    • contain : 包含,在区域内图片完全展示,不拉伸,不裁剪
    • cover : 覆盖,覆盖整个区域,可能图片本身会被部分被挡住而不显示,等比缩放,可能会裁剪
    • stretch : 拉伸,拉伸图片以撑满整个区域

例:


    <Image source={{uri:"https://gd2.alicdn.com/imgextra/i2/413996455/TB2tNcJbd0opuFjSZFxXXaDNVXa_!!413996455.jpg"}} quality ="original"/>

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Package last updated on 23 Jan 2018

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