我有一个表单可以将用户优先保存在本地存储中,可以在this fiddle or below中看到。
到目前为止,我有两个主要问题。
我最大的问题是我拥有的选项只有一个选项,但在这种情况下,用户可以选择多个,所以我需要添加多少,以便用户可以保存多个值本地存储,以便下次加载页面时会保存多个选项?
<form name="Filter">
<select multiple="1" id="filter">
<option value="111">Andrew</option>
<option value="222">Bill</option>
<option value="333">Charles</option>
<option value="444">Dikembe</option>
<option value="555">Edward</option>
</select>
</form>
<div id="store">click to store</div>
<br>
<h3>People I have stored</h3>
<div id="myStorage"></div>
JS
var iSelectedTitle = localStorage.getItem('title');
var iSelectedVal = localStorage.getItem('value');
console.log("iSelectedTitle: " + iSelectedTitle);
console.log("iSelectedVal: " + iSelectedVal);
$("#filter option").each(function () {
if ($(this).val() == iSelectedVal) {
$(this).attr("selected", "selected");
}
});
$("#store").click(function () {
var mytitle = $("#filter option:selected").text();
var storedTitle = localStorage.setItem("title", mytitle);
console.log("mytitle: " + mytitle);
console.log("storedTitle: " + storedTitle);
var myValue = $("#filter option:selected").val();
var storedValue = localStorage.setItem("value", myValue);
console.log("myValue: " + myValue);
console.log("storedValue: " + storedValue);
if (iSelectedTitle != "undefined") {
$('#myStorage').empty().append(iSelectedTitle);
}
});
if (iSelectedTitle != "undefined") {
$('#myStorage').append(iSelectedTitle + ' - <a target= "_blank "href="http://www.example.com/' + iSelectedVal + '">View profile</a>');
}
答案 0 :(得分:2)
您可以使用jQuery的map
向数组添加多个选项:
var optArray = $("#filter option:selected").map(function () {
return {
"title": this.innerHTML,
"value": this.value
}
}).get();
这会给你一个很好的数组:
[
{ "title": "Andrew", "value": "111" },
{ "title": "Bill", "value": "222" },
{ "title": "Charles", "value": "333" }
]
添加到localStorage:
$("#store").click(function () {
//get the selected options in the form of an array
var optArray = $("#filter option:selected").map(function () {
return {
"title": this.innerHTML,
"value": this.value
}
}).get();
console.log(optArray);
//set that to localStorage
localStorage["optArray"] = JSON.stringify(optArray);
//refresh myStorage
getFromStore();
});
要使用新添加的人刷新myStorage
容器,您必须将此处理程序称为“click事件(上图)中的最后一个事件。”
var getFromStore = function () {
//check if store values are null, if null, make store =[]
var store = [undefined, null].indexOf(localStorage["optArray"]) != -1 ? [] : JSON.parse(localStorage["optArray"]);
console.log(store);
//empty container before u put values
$('#myStorage').html('');
//check if store is empty
if (store.length != 0) {
//loop over store if it aint empty and append the content into myStorage div
for (var k in store) {
var str = '<div>' + store[k]["title"] + ' - <a target= "_blank" href="http://www.example.com/' + store[k]["value"] + '">View profile</a></div>';
console.log(store[k]);
$('#myStorage').append(str);
}
} else {
//do this if no data is found in localStorage
$("#myStorage").html("No people found in store");
}
}
然后,在DOM ready
中,在页面加载时调用getFromStore
刷新myContainer
:
$(function() {
getFromStore();
})
演示:http://jsfiddle.net/hungerpain/hqVGS/9/
修改强>
要默认选中复选框,请在getFromStore
功能中添加以下行:
$("[value=" + store[k]["value"] + "]","#filter").prop("selected", true); //find the option with the corresponding value and select it
答案 1 :(得分:1)
您可以在数组中保存多个值,
var myValuesArr = ['one','two','three'];
在将数组保存到localStorage
var serialVals = JSON.stringify(myValuesArr);
localStorage.setItem('numbers',serialVals);
同样,存储的数据在回读后必须进行反序列化
var serialVals = localStorage.getItem('numbers');
var myValuesArr = JSON.parse(serialVals);