小编kbo*_*boy的帖子

我正在设置一个地图来查找一个人的坐标，然后将该位置放在地图上。但由于某种原因，坐标没有显示在地图上。我使用 console.log 确保状态变量（存储坐标的位置）发出正确的坐标，而且确实如此。我不知道为什么地图不会改变给他们。

我的代码：

import { StatusBar } from "expo-status-bar";
import React from "react";
import { StyleSheet, Text, View } from "react-native";
import { MapContainer, TileLayer, Marker, Popup } from "react-leaflet";
import Constants from "expo-constants";
import * as Location from "expo-location";
import * as Permissions from "expo-permissions";
import { render } from "react-dom";

import "leaflet/dist/leaflet.css";

export default class App extends React.Component {
  constructor() {
    super();
    this.state = {
      ready: false,
      where: { lat: '', lng: '' },
      error: null,
    }; …