Angular Googlemaps本机在拖动后获取标记位置
在设置“on marker drag end”侦听器给出的新坐标时,我面临一个奇怪的问题。尝试设置变量this.lat和this.lng时,甚至尝试在事件侦听器中控制台注销它们时,我会收到以下错误:Angular Googlemaps本机在拖动后获取标记位置,angular,google-maps,ionic3,ionic-native,Angular,Google Maps,Ionic3,Ionic Native,在设置“on marker drag end”侦听器给出的新坐标时,我面临一个奇怪的问题。尝试设置变量this.lat和this.lng时,甚至尝试在事件侦听器中控制台注销它们时,我会收到以下错误: ERROR Error {rejection: TypeError, promise: t, zone: r, task: e, stack: (...)…} message: "Uncaught (in promise): TypeError: Cannot set property 'lat'
ERROR
Error {rejection: TypeError, promise: t, zone: r, task: e, stack: (...)…}
message: "Uncaught (in promise): TypeError: Cannot set property 'lat' of undefined↵TypeError: Cannot set property 'lat' of undefined↵ at file:///android_asset/www/build/28.js:180:27↵ at t.invoke (file:///android_asset/www/build/polyfills.js:3:14976)↵ at Object.zone._inner.zone._inner.fork.onInvoke (file:///android_asset/www/build/vendor.js:4248:33)↵ at t.invoke (file:///android_asset/www/build/polyfills.js:3:14916)↵ at r.run (file:///android_asset/www/build/polyfills.js:3:10143)↵ at file:///android_asset/www/build/polyfills.js:3:20242↵ at t.invokeTask (file:///android_asset/www/build/polyfills.js:3:15660)↵ at Object.zone._inner.zone._inner.fork.onInvokeTask (file:///android_asset/www/build/vendor.js:4239:33)↵ at t.invokeTask (file:///android_asset/www/build/polyfills.js:3:15581)↵ at r.runTask (file:///android_asset/www/build/polyfills.js:3:10834)"
promise: t
rejection: TypeError
stack: (...)
get stack: function () { [native code] }
set stack: function () { [native code] }
task: e
zone: r
__proto__: d
这就好像这两个变量不可及或者我不知道。现在试着调试了3个小时,但没有任何运气。也许我只是没有注意到一些事情,所以任何帮助都会非常感激。所讨论的功能是updatePosition,其他功能都在工作
这是我的密码:
import { Component } from '@angular/core';
import {IonicPage, NavController, NavParams, Platform} from 'ionic-angular';
import {HelperProvider} from "../../providers/helper/helper";
import {
GoogleMaps,
GoogleMap,
GoogleMapsEvent,
GoogleMapOptions,
Marker, CameraPosition, ILatLng
} from '@ionic-native/google-maps';
import {Geolocation, GeolocationOptions} from "@ionic-native/geolocation";
@IonicPage()
@Component({
selector: 'page-statement',
templateUrl: 'statement.html',
})
export class StatementPage {
map: GoogleMap;
lat:any;
lng:any;
settlementLat:any;
settlementLng:any;
geoLocationOption: GeolocationOptions;
showMap: boolean = false;
constructor(
public navCtrl: NavController,
public platform: Platform,
private geoLocation: Geolocation,
private helper: HelperProvider,
public navParams: NavParams) {
const data = JSON.parse(localStorage.getItem('deviceData'));
if(data.settlementLat && data.settlementLng){
this.settlementLat = data.settlementLat;
this.settlementLng = data.settlementLng;
}
}
openMap(){
this.showMap = true;
setTimeout(()=> {this.loadMap()},500)
}
loadMap() {
this.map = GoogleMaps.create('statementMap', {
'camera': {
'target': {
"lat": parseFloat(this.settlementLat),
"lng": parseFloat(this.settlementLng)
},
'zoom': 18
}
});
this.map.one(GoogleMapsEvent.MAP_READY).then(() => {
this.geoLocationOption = {
maximumAge: 0,
timeout : 15000,
enableHighAccuracy: true
};
this.helper.presentLoading('Searching for GPS position...');
this.getPosition();
});
}
getPosition(){
this.geoLocation.getCurrentPosition(this.geoLocationOption).then((resp) => {
this.helper.closeLoading();
this.lat = resp.coords.latitude;
this.lng = resp.coords.longitude;
let position: CameraPosition<ILatLng> = {
target: {
lat: this.lat,
lng: this.lng
},
zoom: 18
};
this.map.moveCamera(position);
this.map.addMarker({
icon: 'blue',
animation: 'DROP',
draggable: true,
position: {
lat: this.lat,
lng: this.lng
}
}).then(this.updatePosition)
}).catch((error) => {
this.helper.closeLoading();
this.map.destroy();
this.helper.presentToast('Please turn on your gps...');
this.showMap = false;
});
}
updatePosition(marker: Marker){
marker.one(GoogleMapsEvent.MARKER_DRAG_END).then(() => {
this.lat = marker.getPosition().lat;
this.lng = marker.getPosition().lng;
console.log(this.lat);
console.log(this.lng);
});
}
}
从'@angular/core'导入{Component};
从“离子角度”导入{IonicPage,NavController,NavParams,Platform};
从“./../providers/helper/helper”导入{HelperProvider}”;
进口{
谷歌地图,
谷歌地图,
谷歌地图服务公司,
谷歌地图选项,
标记器,摄像机位置,ILatLng
}来自“@ionic native/google地图”;
从“@ionic native/Geolocation”导入{Geolocation,GeolocationOptions};
@IonicPage()
@组成部分({
选择器:“页面语句”,
templateUrl:'statement.html',
})
导出类语句页面{
地图:谷歌地图;
lat:任何;
液化天然气:任何;
定居地:任何;
结算:任何;
地理定位选项:地理定位选项;
showMap:boolean=false;
建造师(
公共navCtrl:NavController,
公共平台:平台,
私人地理定位:地理定位,
私人佣工:HelperProvider,
公共navParams:navParams){
const data=JSON.parse(localStorage.getItem('deviceData');
if(data.settlementLat&&data.settlementLng){
this.settlementLat=data.settlementLat;
this.settlementLng=data.settlementLng;
}
}
openMap(){
this.showMap=true;
setTimeout(()=>{this.loadMap()},500)
}
loadMap(){
this.map=GoogleMaps.create('statementMap'{
“照相机”:{
“目标”:{
“lat”:parseFloat(本结算表),
“液化天然气”:parseFloat(本结算)
},
“缩放”:18
}
});
这个.map.one(GoogleMapsEvent.map_READY)。然后(()=>{
this.geoLocationOption={
最大值:0,
超时:15000,
EnableHighAccurance:正确
};
this.helper.presentLoading('搜索GPS位置…');
这个.getPosition();
});
}
getPosition(){
this.geoLocation.getCurrentPosition(this.geoLocationOption)。然后((resp)=>{
this.helper.closeLoading();
this.lat=相应的坐标纬度;
this.lng=相应的坐标经度;
let位置:CameraPosition={
目标:{
拉特:这个,拉特,
液化天然气:这是液化天然气
},
缩放:18
};
此.map.moveCamera(位置);
这个是.map.addMarker({
图标:“蓝色”,
动画:“放下”,
真的,
职位:{
拉特:这个,拉特,
液化天然气:这是液化天然气
}
}).然后(此.updatePosition)
}).catch((错误)=>{
this.helper.closeLoading();
this.map.destroy();
this.helper.presentToast('请打开您的gps…');
this.showMap=false;
});
}
更新位置(标记:标记){
marker.one(GoogleMapsEvent.marker)然后(()=>{
this.lat=marker.getPosition().lat;
this.lng=marker.getPosition().lng;
console.log(this.lat);
控制台日志(this.lng);
});
}
}
尝试避免无效使用此运算符,例如
getPosition(){
this.geoLocation.getCurrentPosition(this.geoLocationOption).then((resp) => {
this.helper.closeLoading();
var my_lat = resp.coords.latitude;
var my_lng = resp.coords.longitude;
let position: CameraPosition<ILatLng> = {
target: {
lat: this.lat,
lng: this.lng
},
zoom: 18
};
this.map.moveCamera(position);
this.map.addMarker({
icon: 'blue',
animation: 'DROP',
draggable: true,
position: {
lat: my_lat,
lng: my_lng
}
}).then(this.updatePosition)
}).catch((error) => {
this.helper.closeLoading();
this.map.destroy();
this.helper.presentToast('Please turn on your gps...');
this.showMap = false;
});
}
getPosition(){
this.geoLocation.getCurrentPosition(this.geoLocationOption)。然后((resp)=>{
this.helper.closeLoading();
var my_lat=相应的坐标纬度;
var my_lng=相应的坐标经度;
let位置:CameraPosition={
目标:{
拉特:这个,拉特,
液化天然气:这是液化天然气
},
缩放:18
};
此.map.moveCamera(位置);
这个是.map.addMarker({
图标:“蓝色”,
动画:“放下”,
真的,
职位:{
拉特:我的拉特,
液化天然气:我的液化天然气
}
}).然后(此.updatePosition)
}).catch((错误)=>{
this.helper.closeLoading();
this.map.destroy();
this.helper.presentToast('请打开您的gps…');
this.showMap=false;
});
}
代码建议仅针对lat和lng的解决方案可能是您在其他人身上有其他问题不正确地使用此仍然无法联系到我的this.lat和this.lng,但我删除了this.updatePosition并使用了一个胖箭头函数来代替它,突然这些变量又可以访问了。所以问题解决了,谢谢你的努力:)