未定义不是对象（评估“options.cache”）

Question

我正在使用带有 Expo 的 Apollo 客户端创建一个反应原生应用程序 尝试在 ios 模拟器中运行应用时出现错误

const MainNavigator = createStackNavigator({
Home: {screen: HomeScreen},
Event: {screen: EventScreen},
});

const client = new ApolloClient();
const RootComponent = createAppContainer(MainNavigator);

const App = () => (
  <ApolloProvider client={client}>
   <RootComponent />
  </ApolloProvider>
);

AppRegistry.registerComponent('Kunkur', () => App);`
export default App;

Answer 1

你需要添加缓存和链接到 apollo 客户端的选项。

import { InMemoryCache } from 'apollo-cache-inmemory';
import { HttpLink } from 'apollo-link-http';


const client = new ApolloClient(
{
  cache: new InMemoryCache(),
  link: new HttpLink(
  {
   uri: 'http://your.graphql.url/graphql'
  })
}