import ImagePlaceholder from 'react-native-cz-image-placeholder';

<ImagePlaceholder
    width={32}
    height={38}
    url={pic_label_image_url}
    defaultSource={require('../../../assets/images/good_default_icon.png')}
/>  

pod 'react-native-fast-image', :path => '../node_modules/react-native-fast-image/react-native-fast-image.podspec'

pod install

defaultSource: 默认图: require('./images/xxx.png')

url: 图片地址: ''

width: 图片宽

height: 图片高

style: 图片样式: {borderRadius: 50}

headers: 图片headers: {"x": "y"}

priority: 图片下载优先级: CZImagePlaceholder.priority.normal (low, high)

cache: 下载缓存策略: CZImagePlaceholder.cacheControl.immutable (web, cacheOnly)

resizeMode: 图片显示类型: CZImagePlaceholder.resizeMode.contain (cover, stretch, center)

evaluateView: 赋值当前视图对象

onLoadStart: 开始下载网络图片

onLoad(event): 下载成功

onError: 下载失败

onLoadEnd: 加载完成，无论成功失败都会调用

/*
* 更换图片地址
* */
this.imagePlaceholder.modifyImageUrl('url');