React Native - 为什么获取缓存结果？

Question

我使用 Fetch 从服务器获取数据，如下所示：

fetch(url, {
    method: 'GET',
    cache: 'no-cache'
});

有时无需任何缓存即可正常工作，有时会得到相同的结果（我确定数据已更改，并且我已使用浏览器检查过这一事实）。

React Native 似乎在后台进行缓存，但我该如何禁用它呢？

Answer 1

如果您将缓存设置为reload，它应该会被修复。

以下是缓存的一些用途。

  // Download a resource with cache busting, to bypass the cache
  // completely.
  fetch("some.json", {cache: "no-store"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with cache busting, but update the HTTP
  // cache with the downloaded resource.
  fetch("some.json", {cache: "reload"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with cache busting when dealing with a
  // properly configured server that will send the correct ETag
  // and Date headers and properly handle If-Modified-Since and
  // If-None-Match request headers, therefore we can rely on the
  // validation to guarantee a fresh response.
  fetch("some.json", {cache: "no-cache"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with economics in mind!  Prefer a cached
  // albeit stale response to conserve as much bandwidth as possible.
  fetch("some.json", {cache: "force-cache"})
    .then(function(response) { /* consume the response */ });

注意：如果它不起作用，请告诉我，我会更新我的答案。

关于fetch 的更多信息请参见：hacks.mozilla 和 developer.mozilla