Question

文档说：

defaultSource

A static image to display while loading the image source.

    uri - a string representing the resource identifier for the image, which should be either a local file path or the name of a static image resource (which should be wrapped in the require('./path/to/image.png') function).
    width, height - can be specified if known at build time, in which case these will be used to set the default <Image/> component dimensions.
    scale - used to indicate the scale factor of the image. Defaults to 1.0 if unspecified, meaning that one image pixel equates to one display point / DIP.
    number - Opaque type returned by something like require('./image.jpg').

仅限文件参考。如何引用内存图像数据，如https://www.npmjs.com/package/react-native-fetch-blob#download-example--fetch-files-that-needs-authorization-token

中的示例代码

RNFetchBlob.fetch('GET', 'http://www.example.com/images/img1.png', {
    Authorization : 'Bearer access-token...',
    // more headers  .. 
  })
  // when response status code is 200 
  .then((res) => {
    // the conversion is done in native code 
    let base64Str = res.base64()
    // the following conversions are done in js, it's SYNC 
    let text = res.text()
    let json = res.json()

  })
  // Status code is not 200 
  .catch((errorMessage, statusCode) => {
    // error handling 
  })

Answer 1

我认为这是不可能的。

defaultSource属性仅接受两种不同的类型：

由require('./image.jpg')返回的数字
具有以下形状的对象：{uri: string, width: number, height: number, scale: number}。 uri字段是一个字符串，用于指向本机端的图像。

React-Native Image标签defaultSource指向内存映像数据？

1 个答案: