反应传单标记旋转答案

【问题标题】：React Leaflet marker rotation反应传单标记旋转
【发布时间】：2020-10-04 17:33:47
【问题描述】：

我已经按照this 构建了一个旋转标记，但不幸的是，它在这里不起作用是我创建的组件

class RotatedMarker extends MapLayer {

static defaultProps = {
    rotationOrigin: 'center',
};

createLeafletElement(props) {
    const el = new LeafletMarker(props.position, this.getOptions(props));
    this.contextValue = {...props.leaflet, popupContainer: el};
    return el;
}

updateLeafletElement(fromProps, toProps) {
    if (toProps.position !== fromProps.position) {
        this.leafletElement.setLatLng(toProps.position);
    }
    if (toProps.icon !== fromProps.icon) {
        this.leafletElement.setIcon(toProps.icon);
    }
    if (toProps.zIndexOffset !== fromProps.zIndexOffset) {
        this.leafletElement.setZIndexOffset(toProps.zIndexOffset);
    }
    if (toProps.opacity !== fromProps.opacity) {
        this.leafletElement.setOpacity(toProps.opacity);
    }
    if (toProps.draggable !== fromProps.draggable) {
        if (toProps.draggable === true) {
            this.leafletElement.dragging.enable();
        } else {
            this.leafletElement.dragging.disable();
        }
    }
    if (toProps.rotationAngle !== fromProps.rotationAngle) {
        this.leafletElement.setRotationAngle(toProps.rotationAngle);
    }
    if (toProps.rotationOrigin !== fromProps.rotationOrigin) {
        this.leafletElement.setRotationOrigin(toProps.rotationOrigin);
    }
}

render() {
    const {children} = this.props;
    return children == null || this.contextValue == null ? null : (
        <LeafletProvider value={this.contextValue}>{children}</LeafletProvider>
    );
}
}

这就是我使用该组件的方式：

<RotatedMarker
    rotationAngle={120}
    rotationOrigin="center"
    position={[violation.latitude,violation.longitude,]}
    icon={getMarkerIcon().icon}>
</RotatedMarker>

我曾尝试直接调用此函数this.leafletElement.setRotationAngle(toProps.rotationAngle);，但出现以下错误：

TypeError: this.leafletElement.setRotationAngle 不是函数

我正在使用 react-leaflet V2

【问题讨论】：

标签： javascript reactjs leaflet react-leaflet

【解决方案1】：

它对我有用。不确定您的设置是什么，但您需要安装 leaflet-rotatedmarker 插件并将其导入您的自定义组件中，以免收到该错误。

你应该有这个

import React from "react";
import { Marker as LeafletMarker } from "leaflet";
import { LeafletProvider, withLeaflet, MapLayer } from "react-leaflet";
import "leaflet-rotatedmarker"; //here import the plugin

class RotatedMarker extends MapLayer {
  static defaultProps = {
    rotationOrigin: "center"
  };
...

这是一个有效的demo

【讨论】：