有一个图书馆可以做到这一点：
React Native View Shot
import RNViewShot from "react-native-view-shot";
RNViewShot.takeSnapshot(viewRef,{
format: "jpeg",quality: 0.8
})
.then(
uri => console.log("Image saved to",uri),error => console.error("Oops,snapshot Failed",error)
);