我创建了一个Google Chrome扩展程序,可以从商家那里获取商家信息。详细信息页面,它使用业务'提取城市,州和邮政编码。借助Google的地理编码API解决问题。我使用localStorage
存储城市,州和别针的值,如下所示:
var city = "", state = "", pin = "";
var url = "https://maps.googleapis.com/maps/api/geocode/json?address="+encodeURIComponent(laddress[1].replace(/<.*?>/g,'').replace('&','&').trim())+"&sensor=false&key=AIzaSyCAQmrAKh0jzNVcT1VqTUhjB5Oh_dxl1zA";
console.log(url);
var xhr = new XMLHttpRequest();
var resp;
xhr.open("GET", url, true);
xhr.setRequestHeader("Content-Type", "*/*");
xhr.onload = function () {
var json = xhr.responseText; // Response
json = json.replace(/^[^(]*\(([\S\s]+)\);?$/, '$1'); // Turn JSONP in JSON
json = JSON.parse(json);
console.log(json.results[0].address_components);
for(var i=0;i<json.results[0].address_components.length;i++){
if(json.results[0].address_components[i].types[0]=="administrative_area_level_2")
city = json.results[0].address_components[i].long_name;
if(json.results[0].address_components[i].types[0]=="administrative_area_level_1")
state = json.results[0].address_components[i].long_name;
if(json.results[0].address_components[i].types[0]=="postal_code")
pin = json.results[0].address_components[i].long_name;
}
localStorage.setItem("city", city);
localStorage.setItem("state", state);
localStorage.setItem("pin", pin);
}
xhr.send();
lcity = localStorage.getItem("city");
lstate = localStorage.getItem("state");
lpin = localStorage.getItem("pin");
时会出现问题
访问多个商家页面时,我应该如何在localStorage
中获得完美的价值?
答案 0 :(得分:0)
我相信你使用了错误的localStorage。虽然localStorage是按照HTML5定义的,但它需要一个有根的上下文,如wwww.something.com。
尝试使用chrome.storage。
修改文档中的示例。我们来使用本地存储。
var city = "", state = "", pin = "";
var url = "https://maps.googleapis.com/maps/api/geocode/json?address="+encodeURIComponent(laddress[1].replace(/<.*?>/g,'').replace('&','&').trim())+"&sensor=false&key=AIzaSyCAQmrAKh0jzNVcT1VqTUhjB5Oh_dxl1zA";
console.log(url);
var xhr = new XMLHttpRequest();
var resp;
xhr.open("GET", url, true);
xhr.setRequestHeader("Content-Type", "*/*");
xhr.onload = function () {
var json = xhr.responseText; // Response
json = json.replace(/^[^(]*\(([\S\s]+)\);?$/, '$1'); // Turn JSONP in JSON
json = JSON.parse(json);
console.log(json.results[0].address_components);
for(var i=0;i<json.results[0].address_components.length;i++){
if(json.results[0].address_components[i].types[0]=="administrative_area_level_2")
city = json.results[0].address_components[i].long_name;
if(json.results[0].address_components[i].types[0]=="administrative_area_level_1")
state = json.results[0].address_components[i].long_name;
if(json.results[0].address_components[i].types[0]=="postal_code")
pin = json.results[0].address_components[i].long_name;
}
chrome.storage.local.set({“city”: city,
"state”: state,
"pin”: pin}, function(){
// Do stuff here after set.
chrome.storage.local.get(["city", "state", "pin",
function(items) {
lcity = items.city;
lstate = items.state;
lpin = items.pin;
}
});
}
xhr.send();
请记住修改清单中的权限以使用存储空间。
快速点: xhr.send()是异步调用。紧接着设置l *变量是数据有时出现的问题。处理卸载或local.set回调。上面的例子在回调中有设置。